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Direct Greenhouse Gases Conversion to Few-Walled Carbon Nanotubes:Optimization of Dual-Step Process Overcoming Single-Step Limitations 认领 引用
1
作者 Jaewon Jang Eunchae Oh +3 位作者 Byung-Joo Kim Young-Hoon Kim Junghoon Yang Jungpil Kim 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期223-237,共15页
This study investigated the efficient conversion of greenhouse gases(GHGs),CO2and CH4mixtures,into few-walled carbon nanotubes(FWCNTs)through an optimized single-step and dual-step chemical vapor deposition(CVD)... This study investigated the efficient conversion of greenhouse gases(GHGs),CO2and CH4mixtures,into few-walled carbon nanotubes(FWCNTs)through an optimized single-step and dual-step chemical vapor deposition(CVD)process.In the single-step process for directly synthesizing FWCNTs from greenhouse gases,CO2concentration,gas flowrates,and H2addition were identified as factors influencing the growth of FWCNTs.It was demonstrated that minimizing the amounts of CO2and H2was essential for achieving complete CO2conversion because CO2acts as an oxidizing agent that hinders CNT growth,while an excess of H2disrupts the chemical equilibrium of the CO2conversion reaction,leading to side reactions that suppress FWCNTs formation.To overcome these limitations,a dual-step approach incorporating sequential catalytic reactions was developed.In the first step,the Ni/SiO2catalyst was utilized to facilitate CO2methanation,reducing CO2amounts while generating CH4-rich gas.In the second step,CH4pyrolysis was performed over the FeMo/MgO catalyst,enabling the growth of high-quality FWCNTs.This sequential configuration successfully synthesized FWCNTs under conditions previously unattainable in the single-step process,validating the effectiveness of the dual-step design.The strategic optimization of process parameters and sequential catalytic reactions established a viable route for converting GHGs into valuable FWCNTs. 展开更多
关键词 carbon dioxide CH4pyrolysis CO2methanation few-walled carbon nanotubes greenhouse gases
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BiVO4/TiO2(N2) Nanotubes Heterojunction Photoanode for Highly Efficient Photoelectrocatalytic Applications 认领 引用 被引量：8
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作者 Rui Wang Jing Bai +3 位作者 Yunpo Li Qingyi Zeng Jinhua Li Baoxue Zhou 《Nano-Micro Letters》 SCIE EI CAS 2017年第2期14-22,共9页
We report the development of a novel visible response BiVO_4/TiO_2(N_2) nanotubes photoanode for photoelectrocatalytic applications. The nitrogen-treated TiO_2 nanotube shows a high carrier concentration rate, thus re... We report the development of a novel visible response BiVO_4/TiO_2(N_2) nanotubes photoanode for photoelectrocatalytic applications. The nitrogen-treated TiO_2 nanotube shows a high carrier concentration rate, thus resulting in a high efficient charge transportation and low electron–hole recombination in the TiO_2–BiVO_4. Therefore, the BiVO_4/TiO_2(N_2) NTs photoanode enabled with a significantly enhanced photocurrent of 2.73 mA cm-2(at 1 V vs. Ag/Ag Cl) and a degradation efficiency in the oxidation of dyes under visible light. Field emission scanning electron microscopy, X-ray diffractometry, energy-dispersive X-ray spectrometer, and UV–Vis absorption spectrum were conducted to characterize the photoanode and demonstrated the presence of both metal oxides as a junction composite. 展开更多
关键词 BiVO4 TiO2(N2) nanotube Heterojunction Photoelectrocatalytic Degradation of dyes
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Supporting IrO2 and IrRuOx nanoparticles on TiO2 and Nb-doped TiO2 nanotubes as electrocatalysts for the oxygen evolution reaction 认领 引用 被引量：3
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作者 Radostina V.Genova-Koleva Francisco Alcaide +4 位作者 Garbine Alvarez Pere L.Cabot Hans-Jürgen Grande María V.Martínez-Huerta Oscar Miguel 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第7期227-239,共13页
IrO2 and IrRuOx(Ir:Ru 60:40 at%),supported by 50 wt%onto titania nanotubes(TNTs)and(3 at%Nb)Nb-doped titania nanotubes(Nb-TNTs),as electrocatalysts for the oxygen evolution reaction(OER),were synthesized and character... IrO2 and IrRuOx(Ir:Ru 60:40 at%),supported by 50 wt%onto titania nanotubes(TNTs)and(3 at%Nb)Nb-doped titania nanotubes(Nb-TNTs),as electrocatalysts for the oxygen evolution reaction(OER),were synthesized and characterized by means of structural,surface analytical and electrochemical techniques.Nb doping of titania significantly increased the surface area of the support from 145(TNTs)to 260 m2g-1(Nb-TNTs),which was significantly higher than those of the Nb-doped titania supports previously reported in the literature.The surface analytical techniques showed good dispersion of the catalysts onto the supports.The X-ray photoelectron spectroscopy analyses showed that Nb was mainly in the form of Nb(IV)species,the suitable form to behave as a donor introducing free electrons to the conduction band of titania.The redox transitions of the cyclic voltammograms,in agreement with the XPS results,were found to be reversible.Despite the supported materials presented bigger crystallite sizes than the unsupported ones,the total number of active sites of the former was also higher due to their better catalyst dispersion.Considering the outer and the total charges of the cyclic voltammograms in the range 0.1–1.4 V,stability and electrode potentials at given current densities,the preferred catalyst was Ir O2 supported on the Nb-TNTs.The electrode potentials corresponding to given current densities were between the smallest ones given in the literature despite the small oxide loading used in this work and its Nb doping,thus making the Nb-TNTs-supported IrO2 catalyst a promising candidate for the OER.The good dispersion of IrO2,high specific surface area of the Nb-doped supports,accessibility of the electroactive centers,increased stability due to Nb doping and electron donor properties of the Nb(IV)oxide species were considered the main reasons for its good performance. 展开更多
关键词 Nb-doped TiO2 nanotubes IrO2 catalyst IrRuOx catalyst Oxygen evolution reaction PEMWE
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Improving the fretting biocorrosion of Ti6Al4V alloy bone screw by decorating structure optimised TiO2 nanotubes layer 认领 引用 被引量：3
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作者 Jiajun Luo Maryam Tamaddon +4 位作者 Changyou Yan Shuanhong Ma Xiaolong Wang Feng Zhou Chaozong Liu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第14期47-55,共9页
TiO2 nanotubes(NT)has been demonstrated its potential in orthopaedic applications due to its enhanced surface wettability and bio-osteointegration.However,the fretting biocorrosion is the main concern that limited its... TiO2 nanotubes(NT)has been demonstrated its potential in orthopaedic applications due to its enhanced surface wettability and bio-osteointegration.However,the fretting biocorrosion is the main concern that limited its successfully application in orthopaedic application.In this study,a structure optimised thin TiO2 nanotube(SONT)layer was successfully created on Ti6Al4V bone screw,and its fretting corrosion performance was investigated and compared to the pristine Ti6Al4V bone screws and NT decorated screw in a bone-screw fretting simulation rig.The results have shown that the debonding TiO2 nanotube from the bone screw reduced significantly,as a result of structure optimisation.The SONT layer also exhibited enhanced bio-corrosion resistance compared pristine bone screw and conventionally NT modified bone screw.It is postulated that interfacial layer between TiO2 nanotube and Ti6Al4V substrate,generated during structure optimisation process,enhanced bonding of TiO2 nanotube layer to the Ti6Al4V bone screws that leading to the improvement in fretting corrosion resistance.The results highlighted the potential SONT in orthopaedic application as bone fracture fixation devices. 展开更多
关键词 Bone implant interface Bone screws Biomedical materials TiO2 nanotubes Fretting corrosion
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Photocatalytic Oxidation of Low Molecular Weight Hydrocarbon Gases over Pt-TiO2 Nanotubes 认领 引用 被引量：2
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作者 蔡元珠 潘晓阳 +1 位作者 李云鹏 易志国 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第9期1328-1338,共11页
Pt-TiO2 nanotubes with tube diameter of -120 nm and uniformly dispersed Pt particles（size of -2 nm） were successfully synthesized via a carbon nanotube（CNT） templating method followed by a photo-deposition process... Pt-TiO2 nanotubes with tube diameter of -120 nm and uniformly dispersed Pt particles（size of -2 nm） were successfully synthesized via a carbon nanotube（CNT） templating method followed by a photo-deposition processing of Pt nanoparticles. The as-obtained Pt-TiO2 NTs possess both enhanced visible light absorption and reduced recombination of photogenerated electrons and holes. These merits boost the Pt-TiO2 NTs an excellent photocatalytic material toward photooxidation of a variety of low molecular hydrocarbons under atmospheric environment. 展开更多
关键词 small molecular hydrocarbons Pt-supported TiO2 nanotubes photocatalysis
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Formation Mechanistism Study of TiO2 Film Comprising Nanotubes and Nanoparticles 认领 引用
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作者 杨笛 王义全 +3 位作者 任国斌 冯帅 陈嫒媛 王文忠 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2012年第1期91-95,I0004,共5页
A novel titanium dioxide （TiO2） film comprising both nanotubes and nanopaticles was fabricated by an anodization process of the modified titanium. The local electric field at the anodized surface was simulated and i... A novel titanium dioxide （TiO2） film comprising both nanotubes and nanopaticles was fabricated by an anodization process of the modified titanium. The local electric field at the anodized surface was simulated and its influence on the morphology of the TiO2 film was discussed. The results show that the electric field strength is enhanced by the covering. The growth rate of TiO2 increases with the assist of the local electric field. However, TiO2 dissolution is hindered since the local electric field prevents [TiF6]6- from diffusing. It means that the balance condition for the formation of nanotubes is broken, and TiO2 nanoparticles are formed. Moreover, the crystal structure of the TiO2 film was confirmed using X-ray diffraction and Raman analysis. The anatase is a main phase for the proposed film. 展开更多
关键词 Anodization TiO2 film Nanotube
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Electro-Optics and Band Gap Energies of Nanosilver-Coated TiO2 Nanotubes on Titanium Metal 认领 引用
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作者 Ugursoy Olgun Mustafa Gülfen +1 位作者 Fatih Ustel Hale Arslan 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2018年第2期153-163,共11页
TiO2 nanotubes on Ti metal surface were prepared by the electrochemical anodization method. Then, nanosilver was deposited onto the nanotubes by the electroless dip coating and the anodization. The obtained TiO2 nanot... TiO2 nanotubes on Ti metal surface were prepared by the electrochemical anodization method. Then, nanosilver was deposited onto the nanotubes by the electroless dip coating and the anodization. The obtained TiO2 nanotubes were examined by using scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, cyclic voltammetry, and UV–Vis. The electrochemical band gap（Eg^CV） of the nanosilver-coated TiO2 nanotubes prepared by the anodization was found as 1.54 eV. Using the UV–Vis measurements, the optical band gap energy（Eg^op.） was calculated as 1.51 eV for the Ag/TiO2 nanotubes obtained by electroless dip coating. The electrical conductivity of the TiO2 nanotubes also increased from 3.0 × 10^-4 to 34.7 S/cm after nano Ag deposition by the anodization method.These Ag/TiO2 nanotubes with low band gap and high electrical conductivity are desirable for the applications in electronics, Li-ion batteries, and solar cells. 展开更多
关键词 Electrochemical anodization TiO2 nanotubes Nano Ag deposition Band gap energy Electrical conductivity
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Preparation and Characterization of TiO2 Nanotubes Decorated by CuO and CeO2 Particles 认领 引用
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作者 SHEN Jiali HE Jihuan 《Journal of Donghua University(English Edition)》 CAS 2019年第2期113-116,共4页
A novel catalyst,TiO2 nanotubes(TiO2 NTs)composite decorated by CuO and CeO2 particles,was prepared by a simple and cost-effective method.The TiO2 NTs were fabricated by the hydrothermal method,and CuO and CeO2 partic... A novel catalyst,TiO2 nanotubes(TiO2 NTs)composite decorated by CuO and CeO2 particles,was prepared by a simple and cost-effective method.The TiO2 NTs were fabricated by the hydrothermal method,and CuO and CeO2 particles loaded onto TiO2 NTs(CuO/CeO2@TiO2 NTs)were prepared by the water bath heating method.The CuO/CeO2@TiO2 NTs were investigated and characterized by transmission electron microscope(TEM),energy dispersive spectrometer(EDS),photoluminescence(PL),X-ray diffractometer(XRD)and ultraviolet-visible light diffuse reflectance spectrum(UV-Vis DRS).Both the p-n heterojunction formed at the p-CuO and n-TiO2 interfaces and the highly induced electron transfer of CeO2 can greatly promote the separation of electrons-holes.Therefore,CuO/CeO2@TiO2 NTs show enhanced absorption and have potential applications in photocatalysis. 展开更多
关键词 TiO2 nanotubes(TiO2 NTs) CuO CeO2 hydrothermal method
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Size effect of carbon nanotubes confined CoP-Ni2P heterostructure via phosphorylation-induction strategy for efficient overall water splitting 认领 引用 被引量：1
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作者 Neng Chen Sai Che +3 位作者 Ye-Heng Zhang Hong-Qiang Li Yong-Feng Li Xiao-Jun He 《Rare Metals》 SCIE EI CAS CSCD 2025年第7期4740-4755,共16页
The size tuning of one-dimensional(1D)spatially confined electrocatalysts with abundant exposed active sites is still a huge challenge for electrocatalytic hydrogen/oxygen evolution reactions(HER/OER)and overall water... The size tuning of one-dimensional(1D)spatially confined electrocatalysts with abundant exposed active sites is still a huge challenge for electrocatalytic hydrogen/oxygen evolution reactions(HER/OER)and overall water splitting(OWS).Herein,we construct CoPNi2P heterostructure embedded ultrafine N-doped carbon nanotubes(CoP-Ni2P@U-NCNTs/NF)with a diameter size of about 50 nm from 2D cobalt-based zeolitic imidazolate framework(Co-ZIF-L/NF)via phosphorylation strategy,while Co-Ni embedded N-doped carbon nanotubes with a diameter of about 200 nm are constructed via carbonization.The size-tuned CoP-Ni2P@U-NCNTs/NF possesses abundant active sites and electron transport pathways,and the stability of CoP-Ni2P heterostructure is improved by carbon coating.Density functional theory(DFT)calculation results verify that the Ni2P and CoP heterojunction synergistic ally promotes the electron redistribution of the Co-Ni to optimize Gibbs free energy of H*(ΔGH*).Meanwhile,the NCNTs-confined CoP-Ni2P induced by phosphating accelerates the reconstruction of the CoOOH-NiOOH compared with Ni-Co,therebyboosting the reaction kinetics of efficient OWS due to the reduced reaction energy barrier of O-O coupling.As expected,the CoP-Ni2P@U-NCNTs/NF favors a low overpotential of 67/203 mV@10 mA cm-2for the HER/OER,realizing an ultralow cell voltage of 1.52V@10 mA cm-2for OWS and long-term durability at various current densities.This work provides a feasible approach to tuning the composition and structure of highefficiency electrocatalysts for the production of green hydrogen. 展开更多
关键词 In-situ growth Transition metal phosphide CoP-Ni2P heterostructure Ultrafine N-doped carbon nanotubes Water splitting
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Two-dimensional ultrathin MoS2-modified black Ti^3+-TiO2 nanotubes for enhanced photocatalytic water splitting hydrogen production 认领 引用 被引量：9
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作者 Wei Ou Jiaqi Pan +7 位作者 Yanyan Liu Shi Li Hongli Li Weijie Zhao Jingjing Wang Changsheng Song Yingying Zheng Chaorong Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第4期188-194,共7页
Two-dimensional (2D) ultrathin MoS2-modified black Ti^3+-TiO2 nanotubes were fabricated using an electrospinning-hydrothermal treatment-reduction method.Bare TiO2 nanotubes were fabricated via electrospinning.Then,2D ... Two-dimensional (2D) ultrathin MoS2-modified black Ti^3+-TiO2 nanotubes were fabricated using an electrospinning-hydrothermal treatment-reduction method.Bare TiO2 nanotubes were fabricated via electrospinning.Then,2D MoS2 lamellae were grown on the surface of the nanotubes and Ti^3+/Ov ions were introduced by reduction.The photocatalytic performance of the 2D MoS2/Ti^3+-TiO2 nanotubes was^15 times better than that of TiO2.The HER enhancement of the MoS2/Ti^3+-TiO2 nanotubes can be attributed to the Pt-like behavior of 2D MoS2 and the presence of Ti^3+-ions,which facilitated the quick diffusion of the photogenerated electrons to water,reducing the H2 activation barrier.The presence of Ov ions in the nanotubes and their hollow structure increased their solar utilization. 展开更多
关键词 2D MoS2 TiO2 nanotubes Ti^3+self-doping Photocatalytic hydrogen production
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Synergetic effect of graphene and Co(OH)2 as cocatalysts of TiO2 nanotubes for enhanced photogenerated cathodic protection 认领 引用 被引量：5
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作者 Xiayu Lu Li Liu +3 位作者 Xuan Xie Yu Cui Emeka E.Oguzie Fuhui Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第2期55-63,共9页
A layer of graphene(GR)particles was successfully deposited at the interface between Co(OH)2 nanoparticles and TiO2 nanotubes,aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor T... A layer of graphene(GR)particles was successfully deposited at the interface between Co(OH)2 nanoparticles and TiO2 nanotubes,aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor TiO2.The obtained Co(OH)2/GR/TiO2 was extensively characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),UV–vis absorption spectra and photoluminescence(PL)emission spectra.Electrochemical impedance spectra,photogenerated potential-time(E-t),photocurrent density-time(i-t)and i-E curves and open circuit potential(OCP)curves were measured to investigate the photoelectrochemical activities and photogenerated cathodic protection properties.The results revealed that Co(OH)2/GR/TiO2 exhibits excellent photoelectrochemical and photogenerated cathodic performance due to synergistic effect between Co(OH)2 and graphene.Co(OH)2 and graphene co-modified TiO2 photoanode could provide an effective protection for 304 stainless steel(304 SS)in 3.5 wt%Na Cl solution for 12 h,which would be promising for future practical applications in the field of marine corrosion protection. 展开更多
关键词 TiO2 nanotubes Graphene Co(OH)2 nanoparticles Photoelectrochemical performance Photogenerated cathodic protection
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Nitrogen-doped carbon encapsulated in mesoporous TiO2 nanotubes for fast capacitive sodium storage 认领 引用 被引量：6
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作者 Baosong Li Shoaib Anwer +3 位作者 Xinhua Huang Shaohong Luo Jing Fu Kin Liao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第4期202-210,共9页
Controllable synthesis of insertion-type anode materials with beneficial micro-and nanostructures is a promising approach for the synthesis of sodium-ion storage devices with high-reactivity and excellent electrochemi... Controllable synthesis of insertion-type anode materials with beneficial micro-and nanostructures is a promising approach for the synthesis of sodium-ion storage devices with high-reactivity and excellent electrochemical performance.In this study,we developed a sacrificial-templating route to synthesize TiO2@N-doped carbon nanotubes(TiO2@NC-NTs)with excellent electrochemical performance.The asprepared mesoporous TiO2@NC-NTs with tiny nanocrystals of anatase TiO2 wrapped in N-doped carbon layers showed a well-defined tube structure with a large specific surface area of 198 m2 g-1 and a large pore size of~5 nm.The TiO2@NC-NTs delivered high reversible capacities of 158 m A h g-1 at 2 C(1 C=335 m A g-1)for 2200 cycles and 146 m A h g-1 at 5 C for 4000 cycles,as well as an ultrahigh rate capability of up to 40 C with a capacity of 98 m A h g-1.Even at a high current density of 10 C,a capacity of 138 m A h g-1 could be delivered over 10,000 cycles.Thus,the synthesis of mesoporous TiO2@NC-NTs was demonstrated to be an efficient approach for developing electrode materials with high sodium storage and long cycle life. 展开更多
关键词 TiO2 nanotubes MoO3 template Nitrogen-doped carbon Anode Sodium-ion battery
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Experimental and computational study of visible light-induced photocatalytic ability of nitrogen ions-implanted TiO2 nanotubes 认领 引用
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作者 Ruijing Zhang Xiaoli Liu +1 位作者 Xinggang Hou Bin Liao 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第4期82-88,共7页
Nitrogen-doped TiO2 nanotubes(TNTs)were prepared by ion implantation and anodic oxidation.The prepared samples were applied in photocatalytic(PC)oxidation of methyl blue,rhodamine B,and bisphenol A under light irradia... Nitrogen-doped TiO2 nanotubes(TNTs)were prepared by ion implantation and anodic oxidation.The prepared samples were applied in photocatalytic(PC)oxidation of methyl blue,rhodamine B,and bisphenol A under light irradiation.To explore the influence of doped ions on the band and electronic structure of TiO2,computer simulations were performed using the VASP code implementing spin-polarized density functional theory(DFT).Both substitutional and interstitial nitrogen atoms were considered.The experimental and computational results propose that the electronic structure of TiO2 was modified because of the emergence of impurity states in the band gap by introducing nitrogen into the lattice,leading to the absorption of visible light.The synergy effects of tubular structures and doped nitrogen ions were responsible for highly efficient and stable PC activities induced by visible and ultraviolet(UV)light. 展开更多
关键词 photocatalytic activities nitrogen ion implantation TiO2 nanotube impurity energy level light irradiation
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Engineering Cl vacancies in lead-free halide double perovskites decorated on TiO2nanotubes for highly sensitive NO2sensing at room temperature 认领 引用 被引量：1
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作者 Keke Li Haiquan Wang +3 位作者 Zhen-Kun He Yan-Yan Song Zhida Gao Chenxi Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第8期618-623,共6页
The sensitive and selective monitoring of nitrogen dioxide(NO2)can have a significant impact on environmental monitoring and health protection.Unfortunately,commercial NO2sensors largely suffer from poor detecti... The sensitive and selective monitoring of nitrogen dioxide(NO2)can have a significant impact on environmental monitoring and health protection.Unfortunately,commercial NO2sensors largely suffer from poor detection sensitivity and high operating temperatures.In this study,we developed a sensitive roomtemperature NO2sensor based on an n-n heterojunction comprised of a Cs2AgInCl6perovskite with chlorine vacancies(VCl)and TiO2nanotube arrays(VCl-Cs2AgInCl6/TiO2NTs).In this design,the large number of chlorine vacancies in the Cs2AgInCl6perovskite act as active sites for oxygen adsorption and the subsequent sensing reaction.Benefitting from the formation of the n-n type heterojunction and the onedimensional structure of the TiO2nanotubes,the Fermi levels are aligned,thereby facilitating the efficient transport of charge carriers between the target gas and the sensing interface.The resulting VClCs2Ag In Cl6/TiO2NTs demonstrate a high response of 7.26 toward 1 ppm of NO2at room temperature,possess a detection limit as low as 20 ppb,and have outstanding performance stability.This work widens the application of perovskite materials and indicates their potential application in medical diagnostics,environmental monitoring,and smart sensing systems. 展开更多
关键词 TiO2nanotube arrays n-n Type heterojunction Roomtemperature Cl vacancy NO2detection
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Photothermal Therapy Using TiO2 Nanotubes in Combination with Near-Infrared Laser 认领 引用 被引量：2
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作者 Chanseok Hong Jungwoo Kang +4 位作者 Jungkeun Lee Hongmei Zheng Soonsun Hong Donheang Lee Chongmu Lee 《Journal of Cancer Therapy》 2010年第2期52-58,共7页
We report the in vitro cell test and in vivo animal test results of titanium oxide nanotubes (TiO2 NTs) as a potential therapeutic agent used for cancer thermotherapy in combination with near-infrared (NIR) laser. The... We report the in vitro cell test and in vivo animal test results of titanium oxide nanotubes (TiO2 NTs) as a potential therapeutic agent used for cancer thermotherapy in combination with near-infrared (NIR) laser. The in vitro cell test results show that both the cells exposed to NIR laser without TiO2 NTs treatment and the cells treated with TiO2 NTs but not with NIR irradiation had cell viabilities higher than 96%. Combination of these two techniques, however, shows cell viability less than 1%. The cell death rate strongly depended on the concentration of TiO2 NTs. Also, the cell deaths were mostly due to necrosis but partly due to late apoptosis. The in vivo animal test results show that tumor cells can be completely destroyed without nearly giving damage to surrounding healthy cells by an injection of an adequate amount of TiO2 NTs/NaCl suspension and a subsequent single continuous laser treatment at a moderately low laser illumina-tion intensity for the exposure time optimized for the tumor size. These results suggest that TiO2 NTs can be effectively utilized as a therapeutic agent for cancer thermotherapy due to their excellent photothermal property and high bio-compatibility. 展开更多
关键词 Thermotherapy TiO2 Nanotubes In Vitro Cell Test In Vivo Animal Test NIR
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Co-electrolysis of carbon dioxide and ferrous oxide in Ca-based molten salt to iron-encapsulated carbon nanotubes with enhanced microwave absorption 认领 引用
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作者 Wangyue Xu Hongwei Wang +3 位作者 Hao Li Juanxiu Xiao Song Bi Wei Xiao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期147-154,共8页
Direct utilization of co-existed ferrous oxide(FeO)dust in CO2flue gas from the steel industry to product value-added materials is yet to be established.Inspired by the form of CaO-CaCO3as natural carbon cycle a... Direct utilization of co-existed ferrous oxide(FeO)dust in CO2flue gas from the steel industry to product value-added materials is yet to be established.Inspired by the form of CaO-CaCO3as natural carbon cycle and the high oxide dissolution capacity of molten salts,CaO is herein introduced into the affordable molten NaCl-CaCl2-FeO salt to generate CO32-through an efficient capture of CO2.The subsequent coelectrolysis of FeO and CO32-successfully produces cathodic Fe-encapsulated carbon nanotubes(Fe@CNT)with enhanced energy efficiency(current efficiency of 83.1%for CO2reduction and energy consumption of 22.49 kWh kg1for Fe@CNT generation).The in-situ capture of CO2by O2generated from the electro-deoxidation of FeO bridges the electrolysis of CO2and FeO,rendering the enhanced current efficiency of the co-electrolysis and template-free generation of Fe@CNT.When evaluated as functional materials for electromagnetic wave absorption,the Fe@CNT integrates dielectric loss of CNT and electromagnetic loss from Fe.The Fe well-defined in CNT induces the synergistic loss and further improves the impedance matching,resulting in excellent electromagnetic wave absorption performance.The coelectrolysis establishes a promising strategy for converting CO2into highly functional materials directly from CO2-containing flue gas from steel industrial without dust removal. 展开更多
关键词 CO2conversion Molten salt electrochemistry Carbon nanotube Iron Microwave absorption
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Corrosion resistance of self-healing three-dimensional Ti/Al-doped TiO2nanotubes Ti3AlC2coating deposited by magnetron sputtered on copper 认领 引用
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作者 WANG Guo-qing WANG Ning +5 位作者 HU Yi-teng WANG Jing GAO Chuan-hui WANG Jie XUE Jun-jie YAN Ke-xin 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第3期867-881,共15页
Copper is a versatile material,commonly utilized in power transmission and electronic devices,but its relative high reactivity necessitates a long-lasting protective technique.Here,we report a method that combines pla... Copper is a versatile material,commonly utilized in power transmission and electronic devices,but its relative high reactivity necessitates a long-lasting protective technique.Here,we report a method that combines plasma-enhanced non-equilibrium magnetron sputtering physical vapor deposition(PEUMS-PVD)and anodization to construct a self-healing three-dimensional Ti/Al-doped TiO2nanotubes/Ti3AlC2coating on the surface of Cu substrates.This novel strategy enhances the corrosion resistance of copper substrates in marine environments,with corrosion current densities of up to 4.5643×10−8A/cm2.Among them,the doping of nano-aluminum particles makes the coating self-healing.The mechanistic analysis of the corrosion behaviors during early immersion experiments was conducted using electrochemical noise,and revealed that during the initial stages of coating immersion,uniform corrosion predominates,with a minor occurrence of localized corrosion. 展开更多
关键词 magnetron sputtering TiO2nanotubes Ti3AlC2coating corrosion resistance performance
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Au Nanoparticle-Doped TiO2 Nanotubes Catalysts Prepared by Anodizing and Electroplating Methods and Its Application for Nitrite Detection 认领 引用
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作者 Mir Ghasem Hosseini Mohamad Mohsen Momeni Solmaz Zeynali 《材料科学与工程（中英文B版）》 2012年第1期16-23,共8页
Au-NPs/TiO2-NTs catalysts were prepared by a two-step process consisting of anodizing of titanium plate followed by electroplating of gold nanoparticles on resulted Ti02 nanotubes. The morphology and surface analysis ... Au-NPs/TiO2-NTs catalysts were prepared by a two-step process consisting of anodizing of titanium plate followed by electroplating of gold nanoparticles on resulted Ti02 nanotubes. The morphology and surface analysis of Au-NPs/TiO2-NTs catalysts were investigated using scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The results indicated that gold nanoparticles were homogeneously deposited on the surface ofTiO2 nanotubes. The TiOz layers consist of individual tubes of about 70-90 nm diameters. The electro-oxidation of nitrite of Au-NPs/TiO2-NTs electrodes is investigated by different electrochemical methods. The electro-catalytic activity of Au-NPs/TiO2-NTs catalysts in the nitrite electro-oxidation was studied by different electrochemical methods. The results indicate that Au-NPs/TiO2-NTs catalysts as a promising support material improve the excellent electro-catalytic activity for nitrite oxidation greatly. So Au-NPs/TiO2-NTs electrode can be used repeatedly and exhibits stable electro-catalytic activity for the nitrite oxidation. 展开更多
关键词 TiO2纳米管 催化剂制备 亚硝酸盐 阳极氧化 Au纳米粒子 电镀 电催化活性 扫描电子显微镜
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Boosting redox kinetics in CoS/Ti3C2heterostructure via interfacial charge redistribution for high-energy-density supercapacitors 认领 引用
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作者 Yu Liu Mengjie Pan +4 位作者 Mengqin Gong Huachen Lin Yulong Ying Longhua Li Hong Jia 《Green Energy & Environment》 SCIE EI CAS CSCD 2026年第2期464-477,共14页
Supercapacitors are indispensable for next-generation energy storage,achieving high energy density and long-term durability remains a formidable challenge.Conventional CoS suffers from poor conductivity,while Ti3C_... Supercapacitors are indispensable for next-generation energy storage,achieving high energy density and long-term durability remains a formidable challenge.Conventional CoS suffers from poor conductivity,while Ti3C2faces severe restacking.Herein,we report a novel synthesis strategy that integrates metal-organic framework(MOF)growth with electrostatic self-assembly to construct heterojunction of CoS nanotubes coated with ultrathin Ti3C2nanofilms.Material characterization via SEM,TEM,XRD,and XPS systematically confirms the heterostructure formation,and chemical composition.This rational design synergistically leverages CoS high pseudocapacitance and Ti3C2metallic conductivity while the heterostructure mitigates restacking,enhances charge transfer,and stabilizes interfacial interactions.Density functional theory(DFT)calculations reveal strengthened OH-adsorption at the Co-Ti interface(Ead=1.106 eV).Consequently,the CoS/Ti3C2@CC delivers a remarkable specific capacitance of 1034.21 F g-1 at 1 A g-1.Assembled into a supercapacitor,CoS/Ti3C2@CC//AC achieves a high energy density of 74.22 Wh kg-1 at 800 W kg-1,maintaining 89.13%initial capacitance after 10,000 cycles.Significantly,it exhibits a remarkably low leakage current(0.23μA)and ultra-prolonged voltage retention(47.14%after 120 h),underscoring exceptional durability.This work pioneers a rational heterostructure engineering strategy by integrating MOF-derived architectures with conductive MXene nanofilms,offering critical insights for the development of ultra-durable supercapacitors. 展开更多
关键词 CoS nanotube arrays Ti3C2nanofilms Heterostructure electrode Interfacial charge redistribution Ultra-durable supercapacitor
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Carboxylated Carbon Nanotube-Supported Copper-Indium Bimetallic Catalysts for Electroreduction of CO2 to Dimethyl Carbonate via Membrane-Free Cascade Electrosynthesis 认领 引用
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作者 Youjia Wang Xin Ma +4 位作者 Yuxin Tian Wenchao Wang Bochen Tian Yansheng Liu Junwei Hou 《Carbon and Hydrogen》 SCIE CAS CSCD 2026年第2期226-243,共18页
Under the background of the dual carbon strategy,upgrading CO2 electroreduction from C1 products to high-value C3 esters is an important direction for realizing its resource utilization and valorization.In this wor... Under the background of the dual carbon strategy,upgrading CO2 electroreduction from C1 products to high-value C3 esters is an important direction for realizing its resource utilization and valorization.In this work,Cu100In50 bimetallic catalysts supported on carboxylated carbon nanotubes were prepared,and a membrane-free paired electrolytic cell cascade system was constructed to achieve the directional conversion of CO2→CO→dimethyl carbonate(DMC).The catalyst exhibits enhanced CO supply and interfacial mass transfer capability,with the number of CO adsorption sites increased by 1.8 times and the methanol contact angle reduced from 22°to 8°.Electrochemical measurements show that the catalyst achieves a CO Faraday efficiency(FECO)of 60.9%at−1.8 V versus Ag/AgCl,whereas the FEH2 remains as low as 2.1%.In the cascade reaction,the FEDMC reaches 52.3%at−2.2 V and remains at 49.6%after 5 cycles.The system can also be extended to the electrosynthesis of diethyl carbonate(DEC),giving a FEDEC of 27.8%.In situ Raman spectroscopy combined with DFT calculations reveals that In doping shifts the d-band center of Cu by 0.38 eV,regulates the adsorption behavior of key intermediates,and suppresses HER,whereas carboxyl groups optimize the interfacial electronic structure and mass transfer behavior.This work provides an efficient catalytic strategy and mechanistic insight for the cascade valorization of CO2 into high-value carbonates. 展开更多
关键词 carboxylated carbon nanotubes cascade reaction CO2electroreduction copper-indium bimetallic catalyst DFT dimethyl carbonate insitu Raman spectroscopy
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