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Hydrothermal conversion from hydrogarnet to hydroandradite based on alumina recovery from red mud 认领 引用 被引量：1
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作者 Hong-fei WU Xiao-lin PAN +3 位作者 Ji-long LIU Feng QIU Tun HE Hai-yan YU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第1期309-322,共14页
To synergistically recover alumina and alkali from red mud(RM),the structural stability and conversion mechanism of hydroandradite(HA)from hydrogarnet(HG)were investigated via the First-principles,XRF,XRD,PSD and SEM ... To synergistically recover alumina and alkali from red mud(RM),the structural stability and conversion mechanism of hydroandradite(HA)from hydrogarnet(HG)were investigated via the First-principles,XRF,XRD,PSD and SEM methods,and a novel hydrothermal process based on the conversion principle was finally proposed.The crystal structure simulation shows that the HA with varied silicon saturation coefficients is more stable than HG,and the HA with a high iron substitution coefficient is more difficult to be converted from HG.The(110)plane of Fe2O3 is easier to combine with HG to form HA,and the binding energy is 81.93 kJ/mol.The effects of raw material ratio,solution concentration and hydrothermal parameters on the conversion from HG to HA were revealed,and the optimal conditions for the alumina recovery were obtained.The recovery efficiencies of alumina and Na2O from the RM are 63.06%and 97.34%,respectively,and the Na2O content in the treated RM is only 0.13%. 展开更多
关键词 hydrogarnet hydroandradite structural stability hydrothermal conversion red mud
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Sequential phase transformations in Ta0.4Ti2Zr alloy via tensile molecular dynamics simulations with deep potential 认领 引用 被引量：1
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作者 Hongyang Liu Rong Chen +3 位作者 Bo Chen Jingzhi He Dongdong Kang Jiayu Dai 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期46-55,共10页
Understanding the complex deformation mechanisms of non-equimolar multi-principal element alloys(MPEAs)requires high-fidelity atomic-scale simulations.This study develops a deep potential(DP)model to enable molecular ... Understanding the complex deformation mechanisms of non-equimolar multi-principal element alloys(MPEAs)requires high-fidelity atomic-scale simulations.This study develops a deep potential(DP)model to enable molecular dynamics simulations of the Ta0.4Ti2Zr(Ta0.4)alloy.Monte Carlo simulations using this potential reveal Ta atom precipitation in the Ta0.4alloy.Under uniaxial tensile loading along the[100]direction in the NPT ensemble,the alloy undergoes a remarkable sequence of phase transformations:an initial body-centered cubic(BCC1)to face-centered cubic(FCC)transformation,followed by a reverse transformation from FCC to a distinct BCC phase(BCC2),and finally a BCC2 to hexagonal close-packed(HCP)transformation.Critically,the reverse FCC to BCC2 transformation induces significant volume contraction.We demonstrate that the inversely transformed BCC2 phase primarily accommodates compressive stress.Concurrently,the reorientation of BCC2 crystals contributes substantially to the observed high strain hardening.These simulations provide atomic-scale insights into the dynamic structural evolution,sequential phase transformations,and stress partitioning during deformation of the Ta0.4alloy.The developed DP model and the revealed mechanisms offer fundamental theoretical guidance for accelerating the design of high-performance MPEAs. 展开更多
关键词 multi-principal element alloys machine-learning potential phase transformation stress partitioning
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Dynamic coordination transformation from single-to dual-metal sites in MOFs for cascaded photoreforming of plastics into CO 认领 引用
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作者 Jian Li Zhenfa Wu +6 位作者 Xinru Zhang Tongan Yan Jin Luo Wenjuan Xue Zhaolin Lv Hongliang Huang Chongli Zhong 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第5期314-323,共10页
Building on the success of catalytic single-metal sites(SMSs)in various model reaction systems,dual-metal sites(DMSs)could provide further breakthrough on catalysing complex reactions especially for those involving mu... Building on the success of catalytic single-metal sites(SMSs)in various model reaction systems,dual-metal sites(DMSs)could provide further breakthrough on catalysing complex reactions especially for those involving multiple cascading steps.Specifically,photocatalytic waste plastic conversion requires bond cleavage into small molecules followed by site-dependent transformations,where DMSs photocatalysts can,in principle,be highly active and selective through efficient charge separation and dual-site synergy.However,related studies remain rare since difficulty on efficient waste plastic photodegradation usually hinders subsequent catalytic conversion.Herein,we report for the first time that dual-metal sites are developed in a two-dimensional metal-organic framework(MOF)(Cu2-DMSs/MOF)derived from single-metal sites in bulk MOF(Cu1-SMSs/MOF)via dynamic coordination-driven transformation.The Cu2-DMSs/MOF catalyst exhibits enhanced photocatalytic performance without sacrificial agents,catalysing the cascading polyethylene-to-CO2 and CO2-to-CO reactions in one step.The polyethylene-to-CO2 degradation rate is 2.32 mmol·g-1·h-1 and the subsequent CO2-to-CO conversion proceeds at 0.29 mmol·g-1·h-1 with 100%selectivity,representing an order-of-magnitude enhancement compared with previous reports.The*O2-and*OH radicals formed from O2 and H2O oxidative cleave C-C and C-H bonds in polyethylene to CO2,which is subsequentially selective reduced to CO via multi-electron proton-coupling.This work offers a conceptual advance in designing dual-metal site catalysts,opening new avenues for cascading photocatalytic conversion of white pollution into valuable chemicals. 展开更多
关键词 Metal-organic framework Dual-metal sites Phase transformation Photocascade Plastic-to-fuel conversion
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Unraveling in-situ electrochemical reconstruction of indium oxide catalysts with oxygen vacancy for enhanced electrocatalytic CO2-to-formate conversion 认领 引用 被引量：1
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作者 Biao Hong Wei Xiao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1652-1661,I0174-I0197,共10页
Indium-based materials have emerged as promising alternative catalysts for the selective electroreduction of CO2to formate,yet the optimal catalytic configuration remains elusive.Herein,theoretical calculation reve... Indium-based materials have emerged as promising alternative catalysts for the selective electroreduction of CO2to formate,yet the optimal catalytic configuration remains elusive.Herein,theoretical calculation reveals that metallic indium over oxygen vacancycontaining In2O3support(In/In2O3-VO)possesses the lowest energy barriers(0.99 eV)for CO2reduction to formate.A rational air-annealing strategy applied to In3+-adsorbed resin is developed to synthesize indium oxide catalysts containing oxygen vacancy(R-In2O3).In-situ spectroscopy techniques confirm in-situ electrochemical reconstruction of the In/In2O3configuration and the effective stabilization of the key reaction intermediate(HCOO*).Consequently,the catalyst delivers excellent CO2-to-formate conversion performance,maintaining a current efficiency above 92% over 56 h of galvanostatic electrolysis at-250 mA·cm-2.These insights provide an effective strategy for the rational design of high-performance and durable indium-based electrocatalysts for sustainable formate production. 展开更多
关键词 carbon dioxide electroreduction indium oxide formate active sites energy conversion
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Nonlinear environmental impacts of digital transformation in China’s mega-urban agglomerations 认领 引用 被引量：1
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作者 Zehui Chen Chuanglin Fang +1 位作者 Zhitao Liu Lingyu Meng 《Geography and Sustainability》 CSCD 2026年第2期59-73,共15页
Amidst rapid digitalization and pressing environmental challenges,understanding the environmental implications of digital transformation is crucial for sustainable urban development.Yet,the complex,potentially nonline... Amidst rapid digitalization and pressing environmental challenges,understanding the environmental implications of digital transformation is crucial for sustainable urban development.Yet,the complex,potentially nonlinear digitalization-environment relationships remain underexplored.This study has two objectives:first,to quantify the nonlinear causal impacts of digital transformation on pollution mitigation and carbon reduction;and second,to unravel the mediating pathways that drive these outcomes.We employ Double Machine Learning(DML)on panel data from 2013 to 2022 across China’s four mega-urban agglomerations to identify the nonlinear environ mental impacts of digital transformation.Mediation analysis is then used to examine the technology,structure,governance,and scale pathways.Despite overall progress in both digital transformation and environmental per formance,significant regional variations persist.Our DML analysis reveals distinct nonlinearities:an S-shaped relationship between digital transformation and pollution mitigation,and a more complex N-shaped curve for the digital transformation-carbon reduction nexus.Mediation analysis further reveals complex mechanism:while the structure path consistently promotes environmental benefits,technology and scale factors show negative effects,and governance impacts diverge,promoting pollution mitigation but hindering carbon reduction.Trans lating digital transformation into environmental benefits necessitates a multi-pronged strategy.Key imperatives include prioritizing green technological innovation over sheer digital expansion to mitigate adverse scale effects,and restructuring energy systems towards renewable sources.Furthermore,digital governance must be wielded judiciously,with accountability to enhance specific environmental goals.This research reveals the intricate and context-dependent nature of digital transformation’s environmental effects,providing data-driven insights for regional policies aiming to leveraging digitalization for environmental sustainability,particularly in urban con texts. 展开更多
关键词 Digital transformation Environmental sustainability Pollution mitigation Carbon reduction Double machine learning
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2.5D process path planning for multi-genus shapes based on combining of topological and geometric properties of medial axis transformation 认领 引用 被引量：1
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作者 Xin JIANG Wenjie ZHAO +3 位作者 Cheng SU Guanying HUO Shirong LI Zhiming ZHENG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第4期640-653,共14页
The 2.5D process is widely utilized in modern industries,with multi-genus cross-sections increasingly encountered in both additive and subtractive manufacturing.Tool paths for multigenus shapes often suffer from disco... The 2.5D process is widely utilized in modern industries,with multi-genus cross-sections increasingly encountered in both additive and subtractive manufacturing.Tool paths for multigenus shapes often suffer from discontinuities that lead to frequent tool liftings,and selfintersections in offset paths,adversely affecting machining accuracy and efficiency.In this context,path topology,stepover uniformity,and degeneration of offset paths represent three fundamental concerns that must be considered in an integrated manner in 2.5D path planning for multi-genus shapes.This study proposes a tool path planning method based on combining of topological and geometric characteristics of medial axis transformation for the shape with multi-genus.A region segmentation strategy tailored to multi-genus shapes is first introduced to prevent global selfintersections in equidistant offset paths.Subsequently,the graph structure of the segmented shape is extracted,and the minimization of tool liftings is formulated as a minimum path cover problem in an undirected graph.A Fermat-spiral-like path topology is adopted within sub-regions to preserve the connectivity of graph and ensure smooth transitions between successive layers of contourparallel paths.Numerical and physical experiment results confirm the proposed method's effectiveness in maintaining stepover uniformity,avoiding degeneration of global self-intersections,and ensuring path connectivity. 展开更多
关键词 2.5D process Medial axis transformation Multi-genus shape Topological segmentation Tool path planning
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Prediction of ferrite transformation start temperature in hot-rolled aluminum bearing dual-phase steel based on combination of metallurgical principles and experimental data 认领 引用
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作者 Xiao-Guang Zhou Si-Qiao Wang +5 位作者 Xu-Yuan Zhang Hong-Bing Wang Chun-Yang Shu Xin-Yao Zhang Si-Wei Wu Zhen-Yu Liu 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第1期149-158,共10页
The accurate establishment of a ferrite transformation start temperature model is crucial to design a reasonable controlled rolling process and ensure uniform microstructure in aluminum bearing dual-phase steel.The me... The accurate establishment of a ferrite transformation start temperature model is crucial to design a reasonable controlled rolling process and ensure uniform microstructure in aluminum bearing dual-phase steel.The measurements of the expansion-temperature curves of aluminum bearing dual-phase steel under continuous cooling and isothermal conditions are presented,utilizing a dynamic transformation dilatometer experiment.Based on these expansion-temperature curves,the start temperature and incubation time of ferrite transformation were determined,elucidating the influence of process parameters on both the incubation time and the start temperature of ferrite transformation.By integrating metallurgical principles with measured incubation time of ferrite transformation,and considering the effects of temperature and strain,a fitting model for the variation in volume free energy during ferrite nucleation was derived.Building upon this foundation,a high-precision incubation time of ferrite transformation mathematical model for the experimental steel was established.To more accurately calculate the start temperature of ferrite transformation under continuous cooling conditions,the Scheil’s additivity rule was modified to account for the effects of deformation and cooling rate.The results indicate that the modification coefficient decreases with increasing the cooling rate and strain,thereby significantly improving the accuracy of calculating the starting temperature of ferrite transformation using the modified additivity rule. 展开更多
关键词 Dual-phase steel Ferrite transformation Incubation time Ferrite transformation start temperature Model
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Conversion of human glial cells into neurons in ex vivo culture of human brain tissue:Essential roles of the transcription factors NeuroD1 and Ascl1 认领 引用
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作者 Liang Xu Qingsong Wang +8 位作者 Jiancheng Liao Jiajun Zheng Bing Qin Wen Li Jiaxuan Zhang Wei Li Xiangyu Wang Maoying Zhang Gong Chen 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第8期3650-3658,共9页
Transcription factor-mediated cell conversion has been reported in the central nervous system of both rodents and nonhuman primates.In particular,glia-to-neuron conversion has been achieved in the brain and spinal cor... Transcription factor-mediated cell conversion has been reported in the central nervous system of both rodents and nonhuman primates.In particular,glia-to-neuron conversion has been achieved in the brain and spinal cord of animal models for neural regeneration and repair.However,whether glia-to-neuron conversion can be used for brain repair in humans needs to be explored.To investigate the use of glia-to-neuron conversion technology in the human brain,we established a long-term ex vivo culture system using human brain tissue that was surgically removed from epileptic patients to test glia-to-neuron conversion directly.We found that neural transcription factors NeuroD1 and Ascl1 both converted human glial cells into neurons.Immunostaining and electrophysiological recordings showed that the glia-converted neurons demonstrated immature properties during the initial 7-14 days of conversion,and then acquired more mature neuronal properties after 21-27 days of conversion.These ex vivo conversion studies in human brain tissue pave the way toward future clinical trials using a transcription factor-based glia-to-neuron conversion approach to treat neurological disorders. 展开更多
关键词 Ascl1 brain slice cell conversion ex vivo culture glial cell glia-to-neuron conversion human brain in vivo reprogramming neural regeneration NeuroD1
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Characteristics of energy conversion and energy flux densities at the Kelvin-Helmholtz vortex 认领 引用
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作者 ZhiZhong Guo Zhe Wang +5 位作者 HuiShan Fu WenZhe Zhang ChenXi Du WenDing Fu ZhenYu Xu JiQiu Niu 《Earth and Planetary Physics》 EI CSCD 2026年第3期524-533,共10页
The Kelvin-Helmholtz(KH)instability serves as an important process for transporting the solar wind mass and energy into the Earth’s magnetosphere.However,energy conversion and energy transport at the vortices driven ... The Kelvin-Helmholtz(KH)instability serves as an important process for transporting the solar wind mass and energy into the Earth’s magnetosphere.However,energy conversion and energy transport at the vortices driven by the KH instability have not been investigated in detail thus far.Here,using high-resolution data from the Magnetospheric Multiscale(MMS)spacecraft,we compare characteristics of energy conversion and energy flux densities between a linear and a nonlinear KH vortex.We find that the linear KH vortex is acting as a generator region(∫J·E0).The energy flux densities increase significantly at the trailing edge of KH vortices.At the linear KH vortex,energy transfer is equally contributed by enthalpy,ion kinetic,and Poynting fluxes,whereas in the nonlinear case,the energy is mainly transported in the form of the Poynting flux and electron kinetic energy and heat fluxes are negligible.These results help us better understand the role of KH vortices in energy conversion and transport at the Earth’s magnetopause. 展开更多
关键词 magnetopause Kelvin-Helmholtz instability energy conversion
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Real-Time Monitoring of Component Conversion during the Foaming and Curing Process of Self-expanding Polyurethane Grouts 认领 引用
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作者 Xiao-Long Li Xuan-Xuan Zi +3 位作者 Xiao-Feng Liu Ming Guo Yan-Hui Zhong Bei Zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第6期1843-1854,I0016,共12页
Polyurethane polymer grouting materials with rapid expansion and solidification characteristics have been widely applied for infrastructure repair and reinforcement.An accurate characterization of the chemical reactio... Polyurethane polymer grouting materials with rapid expansion and solidification characteristics have been widely applied for infrastructure repair and reinforcement.An accurate characterization of the chemical reaction process of the slurry is essential for investigating its grouting mechanism.However,the high concentration of isocyanate groups in such polymer systems causes a“flat-top phenomenon”in Fourier transform infrared(FTIR)spectroscopy,rendering it difficult to accurately determine the conversion rate.To address this issue,a real-time method for measuring the reaction conversion rates of slurry components was proposed.The polyol conversion rate was obtained by tracking the integral area changes of the C―O bond peak in the carbamate product relative to the internal standard.The total slurry volume was determined at different time intervals using light detection and ranging(LiDAR)-based point cloud scanning,from which the gas volume was estimated.Combined with the solubility curve of the physical blowing agent and ideal gas law,the conversion rate of the chemical blowing agent was calculated.The isocyanate conversion rate was indirectly inferred based on the measured polyol and chemical blowing agent conversions.This method was applied to a polyurethane grouting material used in an engineering project,and the time-resolved conversion curves of all components throughout the reaction were obtained.The results revealed a three-stage evolution:a slow initial increase,a rapid rise in the middle stage,and a gradual deceleration in the later stage.The foaming reaction proceeded consistently faster than the gelation reaction did.These findings provide a foundation for further research on the diffusion mechanisms of polyurethane polymer slurries. 展开更多
关键词 Grouting materials Polymer Chemical reaction Component conversion rate testing
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Bio-inspired amino acid promoted nanofluidic ion transport and energy conversion in free-standing layered vermiculite-based membranes 认领 引用
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作者 Ruohan Feng Chaoran Zhang +1 位作者 Di Zhang Fang Song 《Green Energy & Environment》 SCIE EI CAS CSCD 2026年第1期248-257,共10页
Two-dimensional nanofluidic membranes have garnered considerable interest due to their potential for cost-effective osmotic energy harvesting.One promising approach to enhancing ion conductivity and selectivity is the... Two-dimensional nanofluidic membranes have garnered considerable interest due to their potential for cost-effective osmotic energy harvesting.One promising approach to enhancing ion conductivity and selectivity is the incorporation of guest additives.However,the traditional host-guest configuration can undermine the structural integrity of nanochannels owing to the inconsistent size and shape of these additives.Drawing inspiration from the intricate design of biological protein channels,which utilize small amino acid molecules as guests,we have addressed this issue by incorporating glycine,a common amino acid,into a vermiculite membrane using a simple vacuum-assisted infiltration method.The resulting vermiculite-glycine membrane demonstrates 1.8 times greater ionic conductivity and twice the power density compared to pure vermiculite membranes.Analysis based on glycine content,coupled with spectroscopic examination,reveals that ion conductivity is linked to the distribution of glycine molecules across three specific sites within the membrane.This suggests that glycine molecules—whether confined in voids,adsorbed onto nanochannel surfaces,or intercalated within multilayered vermiculite nanoparticles—enhance nanofluidic ion transport by modulating surface and space charge density,as well as strengthening hydrogen bonding,electrostatic interactions,and steric effects.This work reveals the specific interactions between amino acids and vermiculite,offering a novel path for advancing nanofluidic composite membranes and highlighting critical considerations for the proposed strategy. 展开更多
关键词 Amino acid Nanofluidics Ion transport Osmotic energy conversion Vermiculite-based membrane
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Conversion of subtropical natural forests to plantations reduces ant taxonomic and functional diversity 认领 引用
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作者 WEN Huihui PENG Qingqing +3 位作者 WANG Dingyi YUE Kai NI Xiangyin WU Fuzhong 《Journal of Mountain Science》 SCIE CSCD 2026年第6期2687-2700,共14页
The widespread conversion of natural forests to monoculture plantations poses a major threat to soil biodiversity,yet its impacts on the taxonomic and functional dimensions of keystone species remain poorly understood... The widespread conversion of natural forests to monoculture plantations poses a major threat to soil biodiversity,yet its impacts on the taxonomic and functional dimensions of keystone species remain poorly understood.Focusing on ants,social insects highly sensitive to environmental changes,we investigated their diversity responses to forest conversion in a mountain ecosystem.Using natural forests as a baseline,we quantified shifts in ant community structure in adjacent broadleaved and fir plantations.Forest conversion induced severe biotic homogenization,with a single genus(Pheidole)accounting for 62%–68%of total ant abundance.Conversion to fir plantations,in particular,led to pronounced declines in taxonomic diversity,significantly reducing Shannon–Wiener diversity and Pielou evenness,underscoring the disruptive effects of coniferous monocultures on natural species assemblages.Functional diversity declined even more sharply after conversion.Functional dispersion(FDis)and Rao’s quadratic entropy(RaoQ)decreased by 68%–74%in broadleaved plantations and by 61%–69%in fir plantations,with the strongest reductions observed in summer.Notably,taxonomic and functional diversity declines were decoupled in response to forest conversion.In plantations,ant diversity variation was primarily associated with moisture and substrate quality(lignin and cellulose),whereas in natural forests,it was more closely linked to litter inputs(litter quantity).Our findings demonstrate that forest conversion profoundly compromises both the structural composition and functional organization of ant communities,potentially triggering cascading effects on critical ecosystem processes.To mitigate biodiversity loss in mountain forest ecosystems,management practices should avoid replacing natural forests with monoculture plantations and instead maintain habitat conditions that support both taxonomic and functional diversity of ants. 展开更多
关键词 Subtropical forests Forest conversion Ants Taxonomic diversity Functional diversity
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Numerical investigation of natural gas-enhanced autothermic pyrolysis for optimizing in-situ conversion in oil shale 认领 引用
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作者 Chao-Fan Zhu Tan-En Jiang +3 位作者 Shan-Shan Yao Jia-Zong Li Rui Jia Wei Guo 《Petroleum Science》 SCIE EI CAS CSCD 2026年第2期762-776,共15页
The autothermic pyrolysis in-situ conversion process for oil shale(ATS)offers the advantages of low development costs and the capability to exploit deep oil shale resources.However,oil shale formations with low oil co... The autothermic pyrolysis in-situ conversion process for oil shale(ATS)offers the advantages of low development costs and the capability to exploit deep oil shale resources.However,oil shale formations with low oil content encounter the challenge of insufficient heat-generating donors in the thermal cracking residue,making it difficult to sustain the autogenous thermal reaction through oxidative exotherm.In this study,we propose a natural gas-assisted autogenous thermal in-situ conversion technology(H-ATS)designed to develop low oil content shale,and we analyze its mechanism through numerical simulation across oil shales with varying oil contents.The results show that introducing 2.0%natural gas into the injected air successfully triggers the autogenous thermal reaction in low-oil-conte nt shale,achieving an energy efficiency of 3.70.For medium oil content shale,a 2.0%natural gas addition,and for high oil content shale,a 4.0%addition,significantly reduces the gas compression energy required,enhancing energy efficiency to 8.11 and 13.04,respectively—representing improvements of 29.47%and 19.19%over the ATS process alone.This study evaluates the applicability of H-ATS technology across various oil shale formations,providing a new approach for the commercialization of in-situ conversion technology. 展开更多
关键词 Oil shale Autothermic pyrolysis in-situ conversion process Natural gas-assisted Energy efficiency
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A Stretchable Sandwich Composite Film With Ultra-Broadband Electromagnetic Interference Shielding and High-Performance Photothermal Conversion Capability 认领 引用
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作者 Dan Guo Donglei Li +7 位作者 Bochong Wang Jianyong Xiang Anmin Nie Yingchun Cheng Kun Zhai Tianyu Xue Fusheng Wen Congpu Mu 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期716-728,共13页
With the rapid growth demand for advanced integrated electronic systems,lightweight flexible electromagnetic interference(EMI)shielding films integrated with functional properties,such as excellent mechanical properti... With the rapid growth demand for advanced integrated electronic systems,lightweight flexible electromagnetic interference(EMI)shielding films integrated with functional properties,such as excellent mechanical properties and self-healing capability,are a research focus in high-tech functional materials.Herein,a sandwich-structured aramid nanofibers/silver nanoparticles/waterborne polyurethane(ANF/AgNPs/WPU,AAgW)composite film is fabricated using microwave synthesis combined with spin-coating.AAgW composite film exhibits excellent stretchability,exceptional EMI shielding effectiveness(SE)in the frequency range of 6.0-60.0 GHz,and effcient photothermal conversion.AAgW film exhibits outstanding mechanical properties with a fracture strain of 406.4%.Notably,EMI SE of 40 dB is achieved in an ultra-wide frequency range of 6.0-60.0 GHz when the thickness of AAgW composite film is only 26.0μm.After 100 stretching cycles at 35%strain,the average SE in the X-band remains at 19.6 dB.In addition,the AAgW film possesses an active heating ability through photothermal conversion,and its surface saturation temperature can reach 71℃under a one-sun illumination.The integration of the"shielding-heating"function provides a brand-new solution for simultaneously achieving stretchable ultra-wideband EMI shielding and photothermal conversion.This work shows great promise for applications in advanced wearable devices and high-frequency communication terminals. 展开更多
关键词 electromagnetic interference shielding photothermal conversion silver nanoparticles spin-coating stretch waterborne polyurethane
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Ultra-High-Efficiency On-Chip CO2Conversion by Nanosecond Self-Pulsing Micro-Plasma Devices 认领 引用
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作者 Guangyu Sun Bartu Karakurt +3 位作者 Hongkeng Zhu Onder Soydal Jeremy S.Luterbacher Elison Matioli 《Carbon Energy》 SCIE EI CAS CSCD 2026年第5期159-172,共14页
Conversion of CO2into carbon-neutral fuels and chemicals remains a central challenge in sustainable chemistry and energy sectors,as conventional catalytic processes are critically limited by the thermodynamic equil... Conversion of CO2into carbon-neutral fuels and chemicals remains a central challenge in sustainable chemistry and energy sectors,as conventional catalytic processes are critically limited by the thermodynamic equilibrium and low overall energy efficiency.Here,a micro-plasma chip for CO2-to-CO conversion is introduced that achieves ultra-high energy efficiency and breaks the thermodynamic equilibrium limitation under ambient conditions.These micro-plasma devices(MPDs)with sub-10-μm discharge gaps self-generate nanosecond pulses directly from a DC bias without external pulsed-power sources and drive discharges through field emission at substantially lower voltages than conventional plasma systems,together yielding an ultra-high energy efficiency.An experimentally validated theoretical framework elucidates the device's working principle and is used for performance improvement.The resulting optimized,scaled-up MPD array constructed for benchmark comparison demonstrates 30%single-pass CO2conversion and 50%overall energy efficiency without any catalyst,which is unprecedented among all previously reported micro-plasma systems.Remarkably,its performance exceeds that of many conventional large-scale plasma systems,while consuming orders of magnitude less power.Integration of localized on-chip reactive species generation by MPDs with catalytic,synthetic,or electrochemical processes could spur the development of new CO2reduction pathways. 展开更多
关键词 CO2reduction micro-discharge microelectronics on-chip chemistry plasma conversion
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Recent Advances in Nanomaterial-Based Light Conversion for Agriculture 认领 引用
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作者 Ting Tang Xue-Yan Gong +2 位作者 Ferdinand Ndikuryayo W.M.W.W.Kandegama Wen-Chao Yang 《Aggregate》 EI CAS CSCD 2026年第4期244-260,共17页
Photosynthesis is a key physiological process for plant growth and survival.Adverse environmental conditions(e.g.,drought and extreme temperatures)have significantly reduced photosynthetic efficiency.Therefore,enhanci... Photosynthesis is a key physiological process for plant growth and survival.Adverse environmental conditions(e.g.,drought and extreme temperatures)have significantly reduced photosynthetic efficiency.Therefore,enhancing crop photosynthesis is crucial for increasing crop yield and addressing global food security.Artificial light supplementation has become a common method to improve photosynthetic efficiency in modern agriculture.The problems of high energy consumption,uneven light distribution,and light pollution associated with traditional supplementary lighting systems not only increase economic costs but can also lead to imbalanced plant growth and negative impacts on the environment and ecosystem.However,traditional supplementary lighting systems suffer from high energy consumption and light pollution,whereas nanotechnology has emerged as a promising alternative to enhance photosynthetic efficiency,despite the limited commercial nanomaterials and unclear action mechanisms.This review systematically summarizes the key factors affecting plant photosynthesis and outlines the main types of existing photosynthesis promoting nanomaterials as well as their underlying mechanisms.On the basis of their modes of action,these nanomaterials are classified into three major categories.First,nanomaterials that directly interact with plant photosynthetic components,second,supplementary light sources integrated with nanomaterials,and third,nanocomposite agricultural films.We discuss the research progress in the application of these nanomaterials in crop cultivation,aiming to provide theoretical support and a scientific basis for the development of more efficient and environment-friendly nanomaterials for enhancing plant photosynthesis. 展开更多
关键词 light conversion materials nanomaterials photosynthetic efficiency supplemental lighting sustainable agriculture
Leakage Current Dominated Piezocatalysis by Na(AlSi2O6)H2O Nanobelts:Highly Efficient U(Ⅵ)Solidification and N2 Conversion 认领 引用
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作者 Feixue Gao Ruimin Li +7 位作者 Yusen Han Ming Fang Shuo Zhang Yan Chen Xiaoli Tan Hui Chen Bin Ma Meiyan Ni 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期856-867,共12页
Piezocatalysis has garnered unprecedented research enthusiasm for applications in energy and environmental fields,as it can harvest the tiny vibration energy from the natural environment and convert it into electrical... Piezocatalysis has garnered unprecedented research enthusiasm for applications in energy and environmental fields,as it can harvest the tiny vibration energy from the natural environment and convert it into electrical energy to drive catalytic reactions.However,the fundamental principles underlying this strategy remain a subject of controversy.Herein,a leakage current-based mechanism is first proposed and employed to elucidate piezocatalysis.It is demonstrated that the cyclic ultrasonic vibration induces an asymmetric cyclic internal electric field,which drives the directional migration of free electrons(i.e.,leakage current)and thus facilitates the occurrence of piezocatalysis.As an example,Na(AlSi2O6)H2O(NASO)nanobelts are fabricated from perlite powder and utilized for highly efficient and low-cost piezocatalytic extraction of uranium(U[Ⅵ])from seawater and the direct conversion of air to nitrate.The extraction of U(Ⅵ)is ascribed to the formation of UO4·2H2O by combining UO22+ and H2O2,and the extraction efficiency is up to 96.97%.Moreover,nitrate is successfully produced from air,and the yield reaches 3.85 mg g-1 h-1.This work offers new insights into the catalytic process,holds substantial application potential for addressing energy and environmental challenges,and sheds important light on the rational design and optimization of piezocatalysts. 展开更多
关键词 leakage current N₂conversion nanobelt piezocatalysis U(VI)removal
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Effect of austenitization on martensite transformation in Co-Cr-Mo alloys by in situ observation 认领 引用
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作者 Yan-peng LI Yuan-li XU +2 位作者 Peng PENG Xu-dong ZHANG Zhi-kun MA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第5期1564-1579,共16页
The martensite transformation of Co-Cr-Mo alloys during cooling after holding at different austenitization temperatures(Ta),was investigated via high-temperature confocal laser scanning microscopy(HT-CLSM).The mart... The martensite transformation of Co-Cr-Mo alloys during cooling after holding at different austenitization temperatures(Ta),was investigated via high-temperature confocal laser scanning microscopy(HT-CLSM).The martensite starting temperature(Ms)increases with increasing Ta.Martensite area fraction(fM)firstly decreases,then increases,and finally decreases with increasing Ta.Additionally,inverse martensite transformation,grain growth,and σphase decomposition were examined during heating via differential scanning calorimetry and HT-CLSM.The effects of Ta on martensite transformation and phase composition of the alloys were analyzed.Ms and fM were influenced by both grain size and pre-existing martensite at Ta of 900-950℃,grain size alone at 950-1100℃,and both grain size and elemental diffusion at 1100-1200℃.This study will provide basic theoretical guidance for regulating the microstructure and enhancing the mechanical properties of Co-Cr-Mo alloys. 展开更多
关键词 austenitization temperature Co−Cr−Mo alloys high-temperature confocal laser scanning microscope martensite transformation phase transformation potential barriers
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From wood to huminite:Molecular structural transformations 认领 引用
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作者 Yu Liu Tengwei Gao +1 位作者 Ji Li Dingshuai Liu 《International Journal of Coal Science & Technology》 SCIE EI CAS CSCD 2026年第1期192-208,共17页
The formation of coal has always been a topic of interest for coal geologists and plays an important role in the enrichment of coal and coal-associated resources,such as critical elements and coalbed methane.In this s... The formation of coal has always been a topic of interest for coal geologists and plays an important role in the enrichment of coal and coal-associated resources,such as critical elements and coalbed methane.In this study,wood,peat,lignite and xylite samples were collected to study the molecular transformation from wood to huminite.Dipolar decoupling magicangle spinning13C nuclear magnetic resonance,cross-polarization magic-angle spinning 13C nuclear magnetic resonance,atomic force microscopy-infrared spectroscopy and X-ray photoelectron spectroscopy experiments were conducted to characterize the molecular structure of different samples.In addition,the molecular model of matrix lignite was reconstructed and shown to align well with the experimental data.The results show that in the process of wood transforming into huminite,the first stage involves the degradation of cellulose and hemicellulose,and some of the ether bonds in lignin also break.In the second stage,the methyl groups from the methoxy structure of lignin are lost,and oxygen-containing linkages such as β-O-4 are degraded to form carboxyl,carbonyl structures and other chemical structures.In the third stage,phenolic hydroxyl groups combine with carboxyl groups to form ester linkages in huminite,while the remaining methyl groups from methoxy continue to be released.Due to the heterogeneity of microbial degradation,textinite preserved structures such as cellulose remnants,and these cellulose remnants were oxidized to form carbonyl groups.However,heavily gelified huminite,such as corpohuminite and densinite,is mainly formed by lignin,with no traces of cellulose found.The study elaborates on the molecular transformation from wood into huminite,which may help in further understanding the formation of coal. 展开更多
关键词 Huminite Vitrinite Molecular transformation Lignin Coal formation
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Changes in source-specific health risks of PM2.5-bound trace elements after the residential“coal-to-gas”conversion measure in urban Beijing 认领 引用
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作者 Wei Yuan Ru-Jin Huang +6 位作者 Jing Duan Jie Guo Wenjuan Cao Ting Wang Jingye Ren Yanan Zhan Wei Xu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期436-442,共7页
The concentration of atmospheric fine particles(PM2.5)has been considerably lowered in Beijing as a result of the implementation of a number of air pollution control initiatives.Nevertheless,the understanding of th... The concentration of atmospheric fine particles(PM2.5)has been considerably lowered in Beijing as a result of the implementation of a number of air pollution control initiatives.Nevertheless,the understanding of the impact of clean air measures on the health risks of PM2.5-bound trace elements is still limited.In this study,the concentrations and chemical fractionation of 14 trace elements in PM2.5 in Beijing after the"coal-to-gas"conversion measure were measured and compared with our previous study in Beijing before the measure.The major elements changed from Fe,Zn,and Pb before the measure to Fe,Ti,and Cu after the measure.The bioavailability of Pb,Zn,Cu,Sr,Ba,and Cr increased by approximately 5%-44%after the measure,while the bioavailability of Cd,Mn,As,Co,V,Fe,Ni,and Ti decreased by approximately 0.5%-31%,which may be mainly attributed to changes in their emission sources.After the measure,the relative contribution of traffic-related emissions to the total concentration of 14 elements increased by 12.1%,and coal combustion decreased by 17.5%.Trafficrelated emissions(92.8%)were the primary causes of carcinogenic risk after the measure,while traffic-related emissions(52.2%)and coal combustion(41.4%)dominated before the measure.This study elucidates changes in concentrations,chemical fractionation,bioavailability,sources,and health risks of PM2.5-bound trace elements in Beijing before and after the“coal-to-gas”conversion measure and suggests that traffic-related emissions should still be the main focus in the future. 展开更多
关键词 Trace elements Chemical fractionation Emission sources Health risks “Coal-to-gas”conversion measure
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