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Preparation methods,biological activities,and potential applications of marine algae oligosaccharides:a review 认领 引用 被引量：10
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作者 Lixin Zheng Yang Liu +2 位作者 Shijie Tang Wancong Zhang Kit-Leong Cheong 《Food Science and Human Wellness》 SCIE CAS CSCD 2023年第2期359-370,共12页
Marine algae are valuable sources of health-promoting molecules that have been consumed by Asians for decades.Among aquatic flora,marine algae stand out in terms of high content of marine algae polysaccharides(MAP)suc... Marine algae are valuable sources of health-promoting molecules that have been consumed by Asians for decades.Among aquatic flora,marine algae stand out in terms of high content of marine algae polysaccharides(MAP)such as carrageenan,alginate,fucoidan,laminaran,agarose,rhamnan,and ulvan.When hydrolyzed,MAP generate marine algae oligosaccharides(MAO),which have attracted interest in recent years due to their superior solubility compared with MAP.Besides,MAO have been demonstrated numerous biological activities including antioxidant,antidiabetic,anti-inflammatory,antimicrobial,and prebiotic activities.Thus,this review summarizes the main chemical classes of MAO,their sources,and the main processes used for their production(i.e.,physical,chemical,and biological methods),coupled with a discussion of the advantages and disadvantages of these methods.Highlights of the biological activities of MAO and their potential applications in food,nutraceutical,and pharmaceuticals would also be discussed and summarized. 展开更多
关键词 Marine algae MAO Preparation methods Biological activities Potential applications
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Effect of preparation methods on Pt/alumina catalysts for the hydrogen iodide catalytic decomposition 认领 引用 被引量：1
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作者 Zhi Chao Wang Lai Jun Wang +3 位作者 Ping Zhang Song Zhe Chen Jing Ming Xu Jing Chen 《Chinese Chemical Letters》 SCIE CAS 2009年第1期102-105,共4页
Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction,impregnation-hydrazine reduction and electroless plating methods.Their differences in the structures,specific areas and particle siz... Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction,impregnation-hydrazine reduction and electroless plating methods.Their differences in the structures,specific areas and particle sizes were characterized by XRD,BET and TEM,respectively.Furthermore,their catalytic activities for the hydrogen iodide(HI)decomposition were evaluated in a fixed bed reactor.The results show that the catalyst 5%Pt/Al2O3 prepared by the electroless plating has the optimum catalytic properties for HI decomposition owing to the high dispersion of the platinum nano-particles(〈5 nm)on the alumina supports. 展开更多
关键词 Hydrogen iodide Catalytic decomposition Pt/At2O3 Preparation methods
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Effect of preparation methods on the adsorption property of municipal solid waste-based carbon materials 认领 引用 被引量：1
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作者 宋敏 唐心红 +1 位作者 唐美 卫月星 《Journal of Southeast University(English Edition)》 EI CAS 2016年第2期208-214,共7页
Three different preparation methods including steam physical activation, catalytic carbonation and KOH chemical activation methods were used to prepare municipal solid waste- based carbon materials. The methylene blue... Three different preparation methods including steam physical activation, catalytic carbonation and KOH chemical activation methods were used to prepare municipal solid waste- based carbon materials. The methylene blue （MB） adsorption value was applied to evaluate the adsorption capabilities of the prepared carbon materials. The effects of preparation methods on adsorption capability and yield of products were investigated. The yield of carbon materials with the catalytic carbonation method is the highest, and the KOH activation method is the second level. Considering the adsorption performance, the KOH activation method is much more favorable. Among the different components of municipal solid waste-based carbon materials, the adsorption properties of the single component of paperboard, the double components of tire and paperboard, the triple components of tire, paperboard and polyvinyl chloride （PVC）, and the multi-component mixtures are better than those of other single-, double-, triple- and multi-component mixtures, respectively. 展开更多
关键词 pyrolysis preparation methods waste adsorption activated carbon
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Effect of preparation methods on the hydrocracking performance of NiMo/Al2O3 catalysts 认领 引用 被引量：5
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作者 Jiake Yang Tongjiu Zuo Jiangyin Lu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第4期224-230,共7页
In this work,NiMo catalysts with various contents of MoO3were prepared through incipient wetness impregnation by a twostep method(NMxA)and onepot method(NMxB).The catalysts were then characterized by XRD,XPS,NH3TPD... In this work,NiMo catalysts with various contents of MoO3were prepared through incipient wetness impregnation by a twostep method(NMxA)and onepot method(NMxB).The catalysts were then characterized by XRD,XPS,NH3TPD,H2TPR,HRTEM,and N2adsorptiondesorption technologies.The performance of the NiMo/Al2O3 catalysts was investigated by hydrocracking lowtemperature coal tar.When the MoO3 content was 15 wt%,the interaction between Ni species and Al2O3 on the NM15B catalyst was stronger than that on the NM15A catalyst,resulting in the poor performance of the former.When the MoO3 content was 20 wt%,MoO3 agglomerated on the surface of the NM20A catalyst,leading to decreased number of active sites and specific surface area and reduced catalytic performance.The increase in the number of MoS2 stack layers strengthened the interaction between Ni and Mo species of the NM20B catalyst and consequently improved its catalytic performance.When the MoO3 content reached 25 wt%,the active metals agglomerated on the surface of the NiMo catalysts,thereby directly decreasing the number of active sites.In conclusion,the twostep method is suitable for preparing catalysts with large pore diameter and low MoO3 content loading,and the onepot method is more appropriate for preparing catalysts with large specific surface area and high MoO3 content.Moreover,the NMxA catalysts had larger average pore diameter than the NMxB catalysts and exhibited improved desulfurization performance. 展开更多
关键词 Preparation methods Hydrocracking performance The NiMo catalysts MoO3content
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Effect of preparation methods on the structure and catalytic performance of Fe–Zn/K catalysts for CO2 hydrogenation to light olefins 认领 引用 被引量：10
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作者 Xu Wang Jianli Zhang +3 位作者 Jingyu Chen Qingxiang Ma Subing Fan Tiansheng Zhao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期761-767,共7页
Potassium promoted iron–zinc catalysts prepared by co-precipitation method(C–Fe–Zn/K),solvothermal method(S–Fe–Zn/K)and hydrothermal method(H–Fe–Zn/K)could selectively convert CO_2to light olefins,respectively.... Potassium promoted iron–zinc catalysts prepared by co-precipitation method(C–Fe–Zn/K),solvothermal method(S–Fe–Zn/K)and hydrothermal method(H–Fe–Zn/K)could selectively convert CO_2to light olefins,respectively.The physicochemical properties of the obtained catalysts were determined by SEM,N_2physisorption,XRD,H_2-TPR,CO_2-TPD and XPS measurements.The results demonstrated that preparation methods had great influences on the morphology,phase structures,reduction and adsorption behavior,and hence the catalytic performance of the catalysts.The samples prepared by hydrothermal and co-precipitation method generated small uniform particles and led to lower specific surface area.In contrast,microspheres with larger specific surface area were formed by self-assembly of nanosheets using solvothermal method.ZnFe_2O_4was the only detectable phase in the fresh C–2Fe–1Zn/K,S–3Fe–1Zn/K and S–2Fe–1Zn/K samples.ZnFe_2O_4and ZnO co-existed with increasing Zncontent in S–1Fe–1Zn/K sample,while ZnO and Fe_2O_3could be observed over H–2Fe–1Zn/K sample.All the used samples contained Fe_3O_4,ZnO and Fe_5C_2.The peak intensity of ZnO was strong in the AR-H–2Fe–1Zn/K sample while it was the lowest in the AR-C–2Fe–1Zn/K sample after reaction.The formation of ZnFe_2O_4increased the interaction between iron and zinc for C–2Fe–1Zn/K and S–Fe–Zn/K samples,causing easier reduction of Fe_2O_3to Fe_3O_4.The surface basicity of the sample prepared by co-precipitation method was much more than that of the other two methods.During CO_2hydrogenation,all the catalysts showed good activity and olefin selectivity.The CO selectivity was increased with increasing Zncontent over S–Fe–Zn/K samples.H–2Fe–1Zn/K catalyst preferred to the production of C_5^+hydrocarbons.CO_2conversion of 54.76%and C_2~=–C_4~=contents of 57.38%were obtained on C–2Fe–1Zn/K sample,respectively. 展开更多
关键词 CO2 hydrogenation Light olefins Preparation methods Iron–zinc catalyst
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Influence of preparation methods on the physicochemical properties and catalytic performance of MnO_x-CeO_2 catalysts for NH_3-SCR at low temperature 认领 引用 被引量：59
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作者 Xiaojiang Yao Kaili Ma +4 位作者 Weixin Zou Shenggui He Jibin An Fumo Yang Lin Dong 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第1期146-159,共14页
This work examines the influence of preparation methods on the physicochemical properties and catalytic performance of MnOx‐CeO2 catalysts for selective catalytic reduction of NO by NH3 (NH3‐SCR) at low temperature.... This work examines the influence of preparation methods on the physicochemical properties and catalytic performance of MnOx‐CeO2 catalysts for selective catalytic reduction of NO by NH3 (NH3‐SCR) at low temperature. Five different methods, namely, mechanical mixing, impregnation,hydrothermal treatment, co‐precipitation, and a sol‐gel technique, were used to synthesizeMnOx‐CeO2 catalysts. The catalysts were characterized in detail, and an NH3‐SCR model reaction waschosen to evaluate the catalytic performance. The results showed that the preparation methodsaffected the catalytic performance in the order: hydrothermal treatment > sol‐gel > co‐precipitation> impregnation > mechanical mixing. This order correlated with the surface Ce3+ and Mn4+ content,oxygen vacancies and surface adsorbed oxygen species concentration, and the amount of acidic sitesand acidic strength. This trend is related to redox interactions between MnOx and CeO2. The catalystformed by a hydrothermal treatment exhibited excellent physicochemical properties, optimal catalyticperformance, and good H2O resistance in NH3‐SCR reaction. This was attributed to incorporationof Mnn+ into the CeO2 lattice to form a uniform ceria‐based solid solution (containing Mn‐O‐Cestructures). Strengthening of the electronic interactions between MnOx and CeO2, driven by thehigh‐temperature and high‐pressure conditions during the hydrothermal treatment also improved the catalyst characteristics. Thus, the hydrothermal treatment method is an efficient and environment‐friendly route to synthesizing low‐temperature denitrification (deNOx) catalysts. 展开更多
关键词 MnOx‐CeO2 catalyst Preparation method Nitrogen oxides Low‐temperature NH3‐SCR Electron interaction Surface acidity
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Influence of preparation methods on CuO-CeO_2 catalysts in the preferential oxidation of CO in excess hydrogen 认领 引用 被引量：9
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作者 Zhigang Liu Renxian Zhou Xiaoming Zheng 《Journal of Natural Gas Chemistry》 2008年第2期125-129,共5页
Influence of three different preparation methods, i.e. impregnation, coprecipitation, and inverse coprecipitation, on the preferential oxidation of CO in excess hydrogen （PROX） over CuO-CeO2 catalysts has been inves... Influence of three different preparation methods, i.e. impregnation, coprecipitation, and inverse coprecipitation, on the preferential oxidation of CO in excess hydrogen （PROX） over CuO-CeO2 catalysts has been investigated and CuO-CeO2 catalysts are characterized using BET, XPS, XRD, UV Raman, and TPR techniques. The results show that the catalysts prepared by coprecipitation have smaller particle sizes, well-dispersed CuOx species, more oxygen vacancies, and are more active in the PROX than those prepared by the other methods. However. the inverse coprecipitation depresses the catalytic performance of CuO-CeO2 catalysts and causes the growth of CuO-CeO2 because of different pH value in the precipitation process. 展开更多
关键词 CuO-CeO2 preparation method preferential oxidation CO fuel cell
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Effect of Preparation Methods of Bi2O3 Nanoparticles on their Photocatalytic Activity 认领 引用 被引量：5
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作者 DING Peng DU Yao-guo XU Zi-li 《Chemical Research in Chinese Universities》 SCIE EI CAS 2004年第6期717-721,共5页
Bi 2O 3 nanoparticles were prepared by means of ammonia precipitation, polyol mediated methods and microemulsion chemical method. The structure and properties of the as-prepared nanoparticles, having been submitted to... Bi 2O 3 nanoparticles were prepared by means of ammonia precipitation, polyol mediated methods and microemulsion chemical method. The structure and properties of the as-prepared nanoparticles, having been submitted to a heat-treatment test at 750 ℃, were characterized by means of XRD, BET, XPS and UV-Vis absorption techniques. The photocatalytic oxidation reactions of benzene, toluene and xylene were used as the model reaction to measure the photocatalytic activity of Bi 2O 3 nanoparticles, respectively. The results show that the crystallite size of Bi 2O 3 prepared with different methods and calcined at 750 ℃ were 50.6, 38.5 and 31.5 nm, respectively. The photocatalytic activity of Bi 2O 3 nanoparticles prepared with the microemulsion chemical method was higher than that of the particles prepared with the polyol mediated method; and that of the particles prepared with the micromulsion chemical method was the highest among the three. The degradation rates of the three pollutants xylene, toluene and benzene decreased in sequence. 展开更多
关键词 Bi2O3 Preparation method Characterization Photocatalytic activity
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Classification of Preparation Methods and Wearability of Smart Textiles 认领 引用 被引量：3
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作者 FANG Jialu DU Jianxia 《Journal of Donghua University(English Edition)》 CAS 2022年第4期379-391,共13页
In recent years,smart textiles have attracted the attention of scholars from all walks of life,but there is an imbalance between functionality and usability,which affects their marketization process.Firstly,five repre... In recent years,smart textiles have attracted the attention of scholars from all walks of life,but there is an imbalance between functionality and usability,which affects their marketization process.Firstly,five representative smart textiles are introduced and their respective wearability is described around preparation methods.Secondly,it is concluded that the preparation methods of smart textiles can be divided into two categories:fiber methods and finishing methods.The fiber methods refer to making smart fibers into smart textiles.Textiles made by fiber methods are breathable and feel good in the hand,but the mechanical properties are influenced by the production equipment,and the process cost is high.The finishing methods refer to the functional finishing of ordinary textiles.Although the finishing method is simple and convenient,it may reduce the comfort of the textile.Finally,applications and new research in various fields of smart textiles are presented with promising prospects.It is anticipated that this review will serve as a theoretical basis for future research and development of smart textiles.Researchers are expected to create new technologies to overcome the tension between functionality and usability,as well as to increase user comfort and convenience. 展开更多
关键词 smart textiles classification of preparation method wearability functionality fabric comfort
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Methods of preparation,structural characteristics of resistant starch and its relation to human health:a review 认领 引用 被引量：1
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作者 Weiyi Zhang Yang Yang +6 位作者 Chunmin Ma Bing Wang Xiaofei Liu Yan Wang Xin Bian Guang Zhang Na Zhang 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第4期1503-1519,共17页
Resistant starch(RS)comprises starch fractions that resist digestion in the small intestine and reach the colon,where they are fermented by the microbiota.Resistant starch harbors functional properties and healthpromo... Resistant starch(RS)comprises starch fractions that resist digestion in the small intestine and reach the colon,where they are fermented by the microbiota.Resistant starch harbors functional properties and healthpromoting ingredients that can regulate blood glucose and lipid levels,prevent cancer,and enhance the quality of life.Consequently,new technologies for the preparation of RS are continually being developed to support its industrial production.This review describes the structural and nutritional properties of RS and examines recent advancements in RS preparation methods.Emphasis is placed on how RS structure influences its properties and the physiological mechanisms in vivo.This review aims to stimulate further research into the preparation methods,functional characteristics,and utilization of RS,thereby supporting ongoing developments in the food industry. 展开更多
关键词 Resistant starch Preparation methods Characterization Function Human health
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Optimization of the Extraction Process and Establishment of the Preparation Method for Guichen Xuanfei Mixture 认领 引用
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作者 Lifu WEI Shengbin CHEN +4 位作者 Xiren ZHENG Xiumei MA Bing QING Zhenying FU Wen ZHONG 《Medicinal Plant》 2026年第3期11-14,共4页
[Objectives]To optimize the extraction and preparation processes of Guichen Xuanfei Mixture and establish a foundation for its industrial-scale production.[Methods]Using the dry paste rate as the evaluation index,a si... [Objectives]To optimize the extraction and preparation processes of Guichen Xuanfei Mixture and establish a foundation for its industrial-scale production.[Methods]Using the dry paste rate as the evaluation index,a single-factor experiment was conducted to examine the effects of soaking time,volume of water added,and extraction duration.Subsequently,orthogonal experiments were employed to optimize the volume of water added,extraction duration,and extraction frequency.Following the determination of the optimal extraction process,process validation tests and pilot-scale production were performed.[Results]The optimal extraction process involved soaking the medicinal materials in water for 30 min,followed by two successive boiling steps.During the first extraction,8 times the volume of water relative to the material was used,and 6 times the volume was applied during the second extraction.Each extraction was conducted for 1 h.The average dry paste rate obtained from the verification test was 24.25%,while the yield rates for the three batches of pilot-scale production were 93.6%,93.9%,and 93.6%,respectively.[Conclusions]The optimized extraction and preparation method is rational,stable,and demonstrates excellent reproducibility,making it well-suited for the industrial-scale production of Guichen Xuanfei Mixture. 展开更多
关键词 Guichen Xuanfei Mixture Extraction process Preparation method
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A systematic review on marine umami peptides:Biological sources,preparation methods,structure-umami relationship,mechanism of action and biological activities 认领 引用 被引量：9
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作者 Yu-Mei Wang Zhe Zhang +2 位作者 Yan Sheng Chang-Feng Chi Bin Wang 《Food Bioscience》 SCIE 2024年第1期1842-1855,共14页
Umami peptide(UP)is an important flavor substance from natural proteins,which can make foods have a more harmonious and rich taste.In addition,UPs have a variety of significant biological activities,such as lowering b... Umami peptide(UP)is an important flavor substance from natural proteins,which can make foods have a more harmonious and rich taste.In addition,UPs have a variety of significant biological activities,such as lowering blood pressure,antioxidant,and hypolipidemia activities.Recently,UPs derived from marine organisms have been reported in a growing number of studies,and marine organism proteins have been considered as important bioresource of UPs,which not only produce high-quality UPs,but also solve the problem of efficient utilization of low-value seafood products and their processing by-products.Although reports of the preparation,structure,and activity of UPs have increased tremendously.However,research on UPs derived from marine organism proteins still lacks a systematic review and evaluation.Therefore,this review summarizes recent advances in UPs derived from marine organism proteins,mainly including:(i)Biological sources of marine UPs;(ii)Preparation process of marine UPs;(iii)Separation,purification and identification methods of marine UPs;(iv)Structure and structure-umami relationship of marine UPs;(v)Umami receptors and mechanism of action of marine UPs;(vi)Biological activity and application of marine UPs.Therefore,this review provides a timely reference for the development of new marine UPs in functional foods and nutritional supplements. 展开更多
关键词 Marine umami peptide Biological sources Preparation methods Structure-umami relationship Umami receptors Biological activity
Study on the effect of preparation method on denitration performance of Co-modified Ce/TiO2 catalyst 认领 引用
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作者 YU Chao ZHANG Boya +2 位作者 SHEN Kai HAN Yuxuan ZHANG Yaping 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第3期79-91,共13页
This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO2 catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s... This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO2 catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s low-temperature denitrification activity.After identifying optimal preparation parameters via condition screening,multiple characterization techniques-including BET,XRD,XPS,H2-TPR and in situ DRIFTS-were employed to deeply analyze the catalyst’s physicochemical properties and reaction mechanism.Results demonstrated that compared to the impregnation and co-precipitation methods,the Ce-Co0.025/TiO2-SG catalyst(prepared by the sol-gel method with a Co/Ti mass ratio of 0.025)exhibited significantly superior denitrification activity:NO conversion remained stably above 95%in the 225−350℃ temperature range,and it displayed high N2 selectivity.Characterization analysis revealed that abundant surface oxygen vacancies,a high proportion of Ce3+ species,and prominent acidic sites collectively contributed to enhancing its low-temperature denitrification performance.This work provides reference value for the development of highly efficient low-temperature denitrification catalysts. 展开更多
关键词 preparation method Co Ce/TiO2 low-temperature denitration NH3-SCR
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The advanced development of one-dimensional transition metal dichalcogenide nanotubes:From preparation to application 认领 引用 被引量：1
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作者 Fengshun Wang Huachao Ji +6 位作者 Zefei Wu Kang Chen Wenqi Gao Chen Wang Longlu Wang Jianmei Chen Dafeng Yan 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第5期187-197,共11页
Two-dimensional(2D)transition metal sulfides(TMDs)are emerging and highly well received 2D materials,which are considered as an ideal 2D platform for studying various electronic properties and potential applications d... Two-dimensional(2D)transition metal sulfides(TMDs)are emerging and highly well received 2D materials,which are considered as an ideal 2D platform for studying various electronic properties and potential applications due to their chemical diversity.Converting 2D TMDs into one-dimensional(1D)TMDs nanotubes can not only retain some advantages of 2D nanosheets but also providing a unique direction to explore the novel properties of TMDs materials in the 1D limit.However,the controllable preparation of high-quality nanotubes remains a major challenge.It is very necessary to review the advanced development of one-dimensional transition metal dichalcogenide nanotubes from preparation to application.Here,we first summarize a series of bottom-up synthesis methods of 1D TMDs,such as template growth and metal catalyzed method.Then,top-down synthesis methods are summarized,which included selfcuring and stacking of TMDs nanosheets.In addition,we discuss some key applications that utilize the properties of 1D-TMDs nanotubes in the areas of catalyst preparation,energy storage,and electronic devices.Last but not least,we prospect the preparation methods of high-quality 1D-TMDs nanotubes,which will lay a foundation for the synthesis of high-performance optoelectronic devices,catalysts,and energy storage components. 展开更多
关键词 One-dimensional transition metal sulfides Nanotubes Structure Preparation method Applications
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A Review:Preparation Technology of Ceramic Microspheres 认领 引用
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作者 GUO Yusen WANG Li +8 位作者 LIU Shijie ZHANG Keke XU Biao WEI Haoyu YAN Miaoxin QIN Feng GENG Shangrui YIN Chaofan DONG Binbin 《China's Refractories》 CAS 2025年第2期38-44,共7页
Ceramic microspheres not only have excellent properties of ceramic materials(low density,large specific surface area,high strength,high hardness,as well as good chemical stability,high temperature resistance and wear ... Ceramic microspheres not only have excellent properties of ceramic materials(low density,large specific surface area,high strength,high hardness,as well as good chemical stability,high temperature resistance and wear resistance),but also have many advantages of microspheres due to their sphericity,making them widely used in nuclear industry,biology,medicine,chemical industry,military industry,environmental protection and many other fields.This paper mainly introduces several methods for preparing ceramic microspheres,including the methods of forming spheres using crystallographic principles,such as the sol-gel method and polymerization-induced colloidal aggregation method;the methods of forming spheres through extrusion,friction,collision and other mechanical forces,such as the air grinding method and die pressing method;and the methods to form spheres using the principle of surface tension,such as the spray drying method and melting method.In addition,the hydrothermal method,hard template method and emulsion-gel injection molding method were also introduced. 展开更多
关键词 coramic microspheres preparation methods research progress
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Edge preparation methods for cutting tools:a review 认领 引用 被引量：1
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作者 Yu ZHOU Wei FANG +6 位作者 Lanying SHAO Yanfei DAI Jiahuan WANG Xu WANG Julong YUAN Weigang GUO Binghai LYU 《Frontiers of Mechanical Engineering》 SCIE CSCD 2023年第4期49-77,共29页
Edge preparation can remove cutting edge defects,such as burrs,chippings,and grinding marks,generated in the grinding process and improve the cutting performance and service life of tools.Various edge preparation meth... Edge preparation can remove cutting edge defects,such as burrs,chippings,and grinding marks,generated in the grinding process and improve the cutting performance and service life of tools.Various edge preparation methods have been proposed for different tool matrix materials,geometries,and application requirements.This study presents a scientific and systematic review of the development of tool edge preparation technology and provides ideas for its future development.First,typical edge characterization methods,which associate the microgeometric characteristics of the cutting edge with cutting performance,are briefly introduced.Then,edge preparation methods for cutting tools,in which materials at the cutting edge area are removed to decrease defects and obtain a suitable microgeometry of the cutting edge for machining,are discussed.New edge preparation methods are explored on the basis of existing processing technologies,and the principles,advantages,and limitations of these methods are systematically summarized and analyzed.Edge preparation methods are classified into two categories:mechanical processing methods and nontraditional processing methods.These methods are compared from the aspects of edge consistency,surface quality,efficiency,processing difficulty,machining cost,and general availability.In this manner,a more intuitive understanding of the characteristics can be gained.Finally,the future development direction of tool edge preparation technology is prospected. 展开更多
关键词 edge preparation method preparation principle cutting edge geometry edge characterization tool performance
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Analysis and discussion of different methods of artificial ice-high specimen preparation 认领 引用 被引量：1
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作者 ShuJuan Zhang Wei Ma +1 位作者 ZhiZhong Sun HaiMin Du 《Research in Cold and Arid Regions》 CSCD 2014年第5期440-446,共7页
Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown... Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown that the uniaxial compression strength of ice-high frozen soils changes as the ice or total water content increases; the differences of different methods of specimen preparation are analyzed here and the advantages and disadvantages of them are presented.It is confirmed that the role of crushed ice is significantly different from that of naturally frozen ice in frozen soils,and the size and amount of crushed ice will influence the strength and deformation mechanism of frozen soils.Therefore,it is strongly recommended that when a ice-high specimen is artificially prepared,the ice should be frozen through natural means and not be replaced with crushed ice. 展开更多
关键词 ice-high specimen artificial preparation method strength deformation
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Research Progress on High Thermal Conductivity Graphene/Copper-Based Composite Heat Sinks for Electronic Equipment 认领 引用 被引量：1
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作者 Li Hongzhao Jiang Haojie +3 位作者 Pan Jiabao Jia Hongsheng Chen Minghe Chen Yang 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第3期636-654,共19页
Graphene/copper-based composite heat sinks demonstrate extensive application potential in military equipment thermal management,high-power electronic packaging,new energy vehicles,and 5G communication systems,due to t... Graphene/copper-based composite heat sinks demonstrate extensive application potential in military equipment thermal management,high-power electronic packaging,new energy vehicles,and 5G communication systems,due to their outstanding properties,including high thermal conductivity,tunable thermal expansion coefficients,excellent mechanical strength,and low density.However,the industrial-scale application of these composites faces critical challenges during the fabrication of components with complex structures,such as inhomogeneous dispersion of graphene within the copper matrix and poor interfacial bonding between the two phases,which substantially undermine the overall performance of graphene/copper-based composites.To address these issues,the preparation methods for graphene/copper-based composite heat sinks were reviewed.For each method,a rigorous analysis was presented to clarify its inherent advantages and unavoidable restrictions.Furthermore,the latest research progress in addressing three core scientific challenges was synthesized,including uniform dispersion of graphene,interfacial optimization mechanisms,and molecular dynamics simulations for elucidating the structure-property relationships.Finally,the future development directions of graphene/copper-based composite heat sinks in engineering applications were prospected. 展开更多
关键词 graphene/copper-based composite heat sinks preparation methods interfacial bonding mechanism molecular dynamics
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Research progress of core-shell catalysts in the deNOx field 认领 引用
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作者 Tao He Chunxue Wang +6 位作者 Yifei Liang Tingjie Fu Kunlin Li Xin Sun Kai Li Ping Ning Fei Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第6期320-331,共12页
Core-shell structured materials exhibit superior stability and catalytic performance in catalytic applications.The unique microenvironment of the core-shell catalyst facilitates efficient enrichment and adsorption of ... Core-shell structured materials exhibit superior stability and catalytic performance in catalytic applications.The unique microenvironment of the core-shell catalyst facilitates efficient enrichment and adsorption of low-concentration,high-mobility atmospheric pollutants.Furthermore,these catalysts have found widespread application in the control of atmospheric contaminants attributed to the synergistic interplay between core-shell components and the protective barrier function of the shell architecture.This paper comprehensively reviews the preparation method of core-shell catalysts and their application in the control of air pollutants.This paper focuses on the advantages of core-shell catalysts and the main types of core-shell catalysts employed in deNOxprocesses.Recognition of the relationship between the structural composition of core-shell catalysts and their catalytic performance,as well as exploring the synergistic effects,heat and mass transfer,and underlying catalytic mechanism.This review offers critical guidance for the design and development of application-oriented core-shell catalysts to abate atmospheric pollutants. 展开更多
关键词 Core-shell catalysts Preparation methods Atmospheric pollutants NH3-SCR deNOx
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Microstructures and properties of Al_2O_3 dispersion-strengthened copper alloys prepared through different methods 认领 引用 被引量：11
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作者 Zhi-qiao Yan Feng Chen +2 位作者 Fu-xing Ye Dong-ping Zhang Yi-xiang Cai 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第12期1437-1443,共7页
Al2O3 dispersion copper alloy powder was prepared by intemal oxidation, and three consolidation methods--high-velocity compaction （HVC）, hot pressing （HP）, and hot extrusion （HE）--were used to prepare Al2O3 disp... Al2O3 dispersion copper alloy powder was prepared by intemal oxidation, and three consolidation methods--high-velocity compaction （HVC）, hot pressing （HP）, and hot extrusion （HE）--were used to prepare Al2O3 dispersion-strengthened copper （Cu-Al2O3） alloys. The microstructures and properties of these alloys were investigated and compared. The results show that the alloys prepared by the HP and HE methods exhibited the coarsest and finest grain sizes, respectively. The alloy prepared by the HVC method exhibited the lowest relative density （98.3% vs. 99.5% for HP and 100% for HE）, which resulted in the lowest electrical conductivity （81% IACS vs. 86% IACS for HP and 87% IACS for HE）. However, this alloy also exhibited the highest hardness （77 HRB vs. 69 HRB for HP and 70 HRB for HE）, the highest compressive strength （443 MPa vs. 386 MPa for I/P and 378 MPa for HE）, and the best hardness retention among the investigated alloys. The results illustrate that the alloy prepared by the HVC method exhibits high softening temperature and good mechanical properties at high temperatures, which imply long service life when used as spot-welding electrodes. 展开更多
关键词 dispersion-strengthened alloys copper alloys alumina preparation methods microstructure properties
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