检索结果-内蒙古大学图书馆

Recent advances in non-metal doped titania for solar-driven photocatalytic/photoelectrochemical water-splitting

能源化学 2022年第3期66卷 529-559页

作者： Ying-Ying Wang Yan-Xin Chen Tarek Barakat Yu-Jia Zeng Jing Liu Stéphane Siffert Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of NamurB-5000 NamurBelgium Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 NamurBelgium CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060GuangdongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430074HubeiChina Unité de Chimie Environnementale et Interactions sur le Vivant Université Littoral Cote d'Opale145Avenue Maurice Schuman59140 DunkerqueFrance Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of NamurB-5000 NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430074HubeiChina

Photocatalytic(PC)/Photoelectrochemical(PEC)water splitting under solar light irradiation is consid-ered as a prospective technique to support the sustainable and renewable H2 economy and to reach the ultime goal of carbon ***2 based photocatalysts with high chemical stability and excellent photocatalytic properties have great potential for solar-to-H2 *** conquer the challenges of the large band-gap and rapid recombination of photo generated electron-holepairs in TiO2,non-metal doping turns out to be economic,facile,and effective on boosting the visible light *** localized defect states such as oxygen vacancy and Ti3+generated by non-metal doping are located in the band-gap of TiO2,which result in the reduction of band-gap,thus a red-shift of the absorption *** hetero dop-ing atoms such as B3+,I7+,S4+/S6+,P5+can also act as electron donors or trap sites which facilitate the charge carrier separation and suppress the recombination of electron-hole *** this comprehensive review,we present the most recent advances on non-metal doped TiO2 photocatalysts in terms of funda-mental aspects,origin of visible light activity and the PC/PEC behaviours for water *** particular,the characteristics of different non-metal elements(N,C,B,S,P,Halogens)as dopants are discussed in details focusing on the synthesis approaches,characterization as well as the efficiency of PC and PEC water *** present review aims at guiding the readers who want quick access to helpful infor-mation about how to efficiently improve the performance of photocatalysts by simple doping strategies and could stimulate new intuitive into the new doping strategies.

关键词： Photocatalytic/Photoelectrochemical water splitting Titania Non-metal doping Visible light photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Functionally Graded Triply Periodic Minimal Surface Scaffold of Ha-Al2o3 Via Vat Photopolymerization 3d Printing

SSRN

引用

SSRN 2023年

作者： Liu, Qiuyu Tang, Qinchao Huang, Zhifeng Li, Zhiwei Wang, Xuye Wen, Pin Bai, Yi Chen, Fei Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of Education Hubei Key Laboratory of Stomatology School & Hospital of Stomatology Wuhan430079 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Wuhan430070 China

Hydroxyapatite (HA) is widely used in scaffolds due to its high similarity in the composition to natural bone. However, the weak and fragile characteristics of synthetic HA limit its application. The strength of HA can be increased by the incorporation of alumina (Al2O3) to obtain composites with extraordinary compressive strength and biocompatibility. HA-Al2O3 composites with different ratios were prepared by Vat photopolymerization 3D printing, and their shrinkage, porosity, phase composition and biocompatibility were systematically investigated. In addition, the Diamond structure of the scaffold was chosen to achieve the trade-off relationship between compressive strength and porosity. The results suggest that the HA-Al2O3 composite with 20 vol% HA possesses the maximum compressive strength and 60 vol% HA has optimal biocompatibility. A compositional gradient scaffold from 60 vol% HA and 20 vol% HA was proposed to satisfy different needs of the different parts in scaffold for biocompatibility and compressive strength. The HA-Al2O3 gradient scaffold achieves a preferable compressive strength of 13.7 MPa while possessing gradient biocompatibility. © 2023, The Authors. All rights reserved.

关键词： Hydroxyapatite

来源：评论

学校读者我要写书评

暂无评论

Vacancy-Based Defect Regulation for High Thermoelectric Performance in Ge9Sb2Te12-x Compounds

引用

ACS APPLIED materials & INTERFACES 2020年第17期12卷 19664-19673页

作者： Chen, Shuo Bai, Hui Li, Junjie Pan, Wenfeng Jiang, Xianyan Li, Zhi Chen, Zhiquan Yan, Yonggao Su, Xianli Wu, Jinsong Uher, Ctirad Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China Department of Physics University of Michigan Ann Arbor Michigan 48109 United States

Defect engineering is the core strategy for improving thermoelectric properties. Herein, cation doping along with modulation of cation vacancy has been developed in GeTe-based materials as an effective method to induce vacancy-based defects to boost their thermoelectric performance. A series of ternary compounds of Ge9Sb2Te12-x (x = 0, 0.03, 0.06, 0.09, 0.12, 0.15) was prepared by vacuum-melting and annealing combined with the spark plasma sintering (SPS) process. The role of Sb doping and cation vacancy on thermoelectric properties was systematically investigated. It is found that alloying Sb2Te3 into GeTe increases the concentration of cation vacancies, which is corroborated by both positron annihilation measurements and theoretical calculations. The vacancies, stacking faults, and planar defect interactions determine the thermoelectric transport properties. Adjusting the deficiency of Te effectively tunes the concentration of cation vacancies and dopant defects in the structure. In turn, this tunes the carrier concentration close to its optimum. A high power factor of 32.6 mu W cm(-1) K-2 is realized for Ge9Sb2Te11.91 at 725 K. Moreover, large strains induced by the defect structures, including Sb dopant, vacancy, staking faults, as well as planar defects intensify phonon scattering, leading to a significant decrease in the thermal conductivity from 7.6 W m(-1) K-1 for pristine GeTe to Ge9Sb2Te11.85 at room temperature. All of the above contribute to a high ZT value of 2.1 achieved for the Ge9Sb2Te11.91 sample at 775 K.

关键词： GeTe-based compounds alloying with Sb2Te3 deficiency of Te stacking fault vacancy plane thermoelectric

来源：评论

学校读者我要写书评

暂无评论

Improvement of Sic Deposition Uniformity in Cvd Reactor by Showerhead with Baffle

SSRN

引用

SSRN 2023年

作者： Li, Qizhong Zhang, Yixuan Ji, Baifeng Zhang, Song Tu, Rong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Civil Engineering and Architecture Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Guangdong Zhongshan528400 China

The deposition rate distribution during halide chemical vapour deposition of silicon carbide (SiC) is influenced by equipment structure, and a uniform film can be obtained by optimising the chamber structure. A detailed chemical reaction mechanism was incorporated into a reaction chamber model to verify the SiC deposition kinetics model. We studied the influence of spray hole size, baffle size, and baffle positioning on the deposition rate uniformity. The results show that reducing the size of the spray holes leads to a "double peak" in the deposition rate across the substrate from the edge to both sides, which first increases and then decreases. The "double peak" disappears when the spray hole size is reduced. With an increase in baffle size, the uniformity of the deposition rate first increased and then decreased. Moreover, the baffle displacement had little effect on the deposition rate when the baffle-to-spray plate distance was at least 45 mm. Meanwhile, the deposition uniformity gradually worsened when the baffle distance was reduced. The spray plate and baffle reduced the extreme difference in deposition rates across the effective deposition area by improving the velocity field of the reaction chamber. A uniform SiC film can be obtained using the proposed optimisation method. © 2023, The Authors. All rights reserved.

关键词： Structural optimization

来源：评论

学校读者我要写书评

暂无评论

Recovering Quadruple-cation Perovskite Films from Water Caused Permanent Degradations

引用

Journal of Wuhan University of technology(materials Science) 2020年第1期35卷 57-64页

作者：赵钦 ZHANG Boyu 彭勇黄志雄 WANG Song CHENG Yibing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering Monash UniversityVIC3800Australia

To promote the stability and efficiency,quadruple-cation perovskite system(blending of MA,FA,Cs,I,Br,etc)was introduced to substitute the traditional MAPbI3 *** films degraded by water can be recovered by a simple *** PbI2 residues decomposed from perovskite were transformed into perovskite again,which gave rise to remarkably boosted optical properties,drastically improved film morphology and largely suppressed *** efficiency of the repairing method was testified by fieldemission scanning electron microscopy,atomic force microscopy,X-ray photoelectron spectroscopy,and so *** power conversion efficiency of fixed perovskite solar cells improved from around 3%to 15.78%(0.16 cm^2,mask area),and 12.56%at area of 1 cm^2,which prove that this method is very effective.

关键词： quadruple-cation perovskite solar cells repair

来源：评论

学校读者我要写书评

暂无评论

Emerging heterostructured C3N4 photocatalysts for photocatalytic environmental pollutant elimination and sterilization

引用

Inorganic Chemistry Frontiers 2023年第13期10卷 3756-3780页

作者： Yang Ding Chunhua Wang Lang Pei Soumyajit Maitra Qinan Mao Runtian Zheng Meijiao Liu Yun Hau Ng Jiasong Zhong Li-Hua Chen Bao-Lian Su Center of Advanced Optoelectronic Materials College of Materials and Environmental Engineering Hangzhou Dianzi University Hangzhou 310018 China School of Energy and Environment City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China Department of Materials University of Oxford Oxford UK Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles Namur Belgium Department of Chemistry Zhejiang Sci-Tech University Hangzhou 310018 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China

Photocatalysis is deemed a highly prominent technology to solve environmental problems such as pollution, CO2 emission and bacterial contamination. As an important photocatalyst, g-C3N4 has attracted a great amount of...

Photocatalysis is deemed a highly prominent technology to solve environmental problems such as pollution, CO₂ emission and bacterial contamination. As an important photocatalyst, g-C3N4 has attracted a great amount of attention in environmental remediation owing to its good stability, excellent light response, low cost and environmentally friendly properties. However, the pristine g-C3N4 photocatalyst generally suffers from serious photoinduced charge carrier recombination, poor surface active sites, and insufficient visible light harvesting, thereby leading to unsatisfactory photocatalytic performance. Heterostructured C₃N₄ photocatalysts have recently become a research focus in environmental fields thanks to their fast photoexcited electron–hole pair dissociation, broadened visible light response range, and sufficient photoredox capability. Herein, we critically review the up-to-date developments of heterostructured C₃N₄ photocatalysts in organic pollutant elimination, heavy metal ion reduction, CO₂ conversion and bacterial inactivation. Meanwhile, the strategies for constructing efficient C₃N₄ based heterostructures with enhanced environmental photocatalytic capability are thoroughly described, which should help readers to quickly acquire in-depth knowledge and to inspire new concepts in heterostructure engineering. Finally, the challenges and opportunities in fabricating heterostructured C₃N₄ photocatalysts for large-scale and commercial applications are discussed to give a clear study direction in this field.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Ultra-Fine Grained Tungsten Heavy Alloy Prepared by High-Pressure Spark Plasma Sintering

SSRN

引用

SSRN 2022年

作者： Zhang, Shuaihao Ji, Wei Zhu, Qiqi Li, Qiunan Wang, Weimin Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hanjiang Hongyuan Xiangyang Silicon Carbide Special Ceramics Co. Ltd. Xiangyang441000 China

Tungsten heavy alloy (WHA) is an ideal material employed for kinetic energy penetrators due to its high density and excellent mechanical properties. However, it is difficult to obtain ultra-fine grained tungsten alloy with excellent properties by traditional powder metallurgy method because of severe grain growth at high sintering temperature with long soaking time. In this study, highly dense 93W-5.6Ni-1.4Fe (wt.%) WHA was successfully fabricated at low temperature of 950 °C with high pressure of 150 MPa by spark plasma sintering. The as-sintered tungsten alloy possesses high relative density (98.6%), ultra-fine grain size (271 nm) and high dislocation density (2.6×1016 m-2 ), which results in excellent properties such as high hardness (1079 HV1). © 2022, The Authors. All rights reserved.

关键词： Spark plasma sintering

来源：评论

学校读者我要写书评

暂无评论

Study of the Effect of Impregnation on Continuous Carbon Fibers Reinforced Sic Ceramic Composites Prepared Via Material Extrusion and Reactive Melting Infiltration

SSRN

引用

SSRN 2022年

作者： Liu, Kai Qiu, Lei Zhang, Yuzhen Du, Yanying Sun, Ce Lu, Chao Zhang, Song Tu, Rong Wu, Yanjiao Sun, Huajun Shi, Yusheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China School of Logistics Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

This paper presents a new method for the efficient preparation of continuous carbon fibers reinforced SiC ceramic (Cf/SiC) composites using material extrusion (MEX) and reactive melting infiltration (RMI). A slurry with the ability to produce stable filaments with good surface quality has been obtained by comparing the rheological behavior. The resin impregnation-carbonization and RMI processes were used for densification to obtain Cf/SiC composites. The effect of the number of impregnation-carbonization on the properties and microstructure of the sintered bodies has been studied. When the impregnation-carbonization was used for 1 time, the specific strength of the sintered body reached the highest value of 4.5 [[EQUATION]] 10 4 N·m/kg and the bending strength reached 93.1±4.3 MPa. In addition, Cf/SiC with complex structures were prepared using this method. This new approach reveals significant potential for MEX printing technology to prepare Cf/SiC composites with complex and lightweight structures. © 2022, The Authors. All rights reserved.

关键词： Carbon fibers

来源：评论

学校读者我要写书评

暂无评论

Aqueous Sn-S Complex Derived Electron Selective Layer for Perovskite Solar Cells

引用

Journal of Wuhan University of technology(materials Science) 2020年第2期35卷 272-279页

作者： LI Zhi SHEN Wenjian ZHAO Juan YING Hangkai WU Zhengli LIU Yifan LI Wangnan KU Zhiliang PENG Yong HUANG Fuzhi CHENG Yibing ZHONG Jie FU Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Hubei Research Center for New Energy&Intelligent Connected Vehicle Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hu-bei University of Arts and ScienceXiangyang 441053China

A novel aqueous Sn-S complex solution was applied as precursor to fabricate SnO2 electron selective layers (ESLs) for the hybrid perovskite solar cells (PSCs).The tin and sulfur powder were directly dissolved in a (NH4)2S water solution to form Sn-S *** depositon and annealing,the SnO2 film was formed,presenting as a low cost and enviromental friendly method for preparation of *** films showed excellent transmittance at visible wavelength ***,the method exhibited high compatibility for doping using Cu,Cd,Li,and Zn *** doping (0.05 M) in the as-prepared SnO2 ESL significantly improved perovskite solar cells (PSCs) *** highest PCE of 13.17% was achived with 15% enhancement compared to that of undoped SnO2 ESL ***4 modifications on SnO2 film improved photovoltaic performance to 14.45%,but resulted in the poor long-term stability,around 80% more degredation than that of PSCs based on Zn-doped SnO2 films.

关键词： perovskite solar cell aqueous solution SnO2 Sn-S complex electron selective layer

来源：评论

学校读者我要写书评

暂无评论

Enhanced Thermoelectric Properties of N-Type Cosb3-Based Composites by Incorporating in Particles

SSRN

引用

SSRN 2022年

作者： Xie, Wenhao Su, Xanli Zheng, Yun Zhu, Bo Cheng, Xin Wang, Ziyu Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education Jianghan University Wuhan430056 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China The Institute of Technological Sciences Wuhan University Wuhan430072 China

Thermoelectric devices that are made of n-and p-type materials in series has been well known and applied owing to the ability that convert waste heat into electric energy. Among them, environmentally friendly and cheap skutterudite materials have been studied as the main object. In this work, n-type CoSb3 based materials were synthesized via non-filling method. The thermoelectric properties were systematically measured via various method and microstructure and morphology was characterized. Finally, the PF maximum value is 3642.3 μW/mK2 at 723 K for Co0.91Ni0.09Sb3/1wt% In sample and the highest ZT value of 1.01 was attained for the Co0.91Ni0.09Sb3/2wt%In thermoelectric ingot. These results indicate that non-filling method could improve the thermoelectric performance of n-type CoSb3 based materials. © 2022, The Authors. All rights reserved.

关键词： Waste heat

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：