检索结果-内蒙古大学图书馆

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

Nir-Response Amorphous Feooh Anchored Bio2-X for Chlorophenols Photodegradation Via Molecular Oxygen Activation

SSRN

引用

SSRN 2023年

作者： Huang, Shengnan Chen, Fengxi Zhu, Deyu Li, Jun Liu, Yunling Chen, Rong State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Donghu New & High Technology Development Zone Hubei Wuhan430205 China Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450002 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Jilin130012 China

Chlorophenols (CPs) are universal and toxic pollutants in nature, as they have been widely detected in surface water, groundwater, sediment, ambient air, soil, and the human body. In this work, novel FeOOH@BiO2-x binary heterostructure composites with UV-Vis-NIR full-spectrum response were successfully constructed by anchoring highly dispersed amorphous FeOOH on BiO2-x nanosheets. A series characterization indicated the binary components were successfully obtained. The FeOOH@BiO2-x photocatalysts exhibited highly enhanced photocatalytic activity for the degradation of chlorophenols under UV-Vis-NIR full-spectrum irradiation. The amorphous FeOOH could effectively broaden the light response range, modulate the energy band structure and promote the separation and transfer of photogenerated electron-holes pairs, thus boosting the activation of molecular oxygen to generate •O2-. Furthermore, FeOOH@BiO2-x maintained excellent photocatalytic performance upon real solar light of varied irradiance for consecutive 7 days, indicative of great potential towards phenolic pollutants degradation in water. The redox couples of Fe3+/Fe2+ and Bi(3+x)+/Bi3+ also accelerate the efficient generation of reactive oxygen species over FeOOH@BiO2-x with improved durability. This work not only contributes to the design of full-spectrum responsive photocatalysts, but also provides a rational strategy for molecular oxygen activation towards the elimination of emerging contaminants. © 2023, The Authors. All rights reserved.

关键词： Bismuth compounds

来源：评论

学校读者我要写书评

暂无评论

Densification and Properties of W-Ag Matrix Composites by Designed Dual-Metal-Layer Coated Powders

SSRN

引用

SSRN 2022年

作者： Luo, Guoqiang Guo, Jingwei Hu, Jianian Li, Peibo Sun, Yi Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China State Key Laboratory of Precision Blasting Jianghan University Wuhan430070 China Chaozhou Branch of Chemistry Chemical Engineering Guangdong Laboratory Chaozhou521000 China

In this study, W-Ag matrix composites were fabricated by a relatively low temperature (750 °C) via designing dual-metal-layer (Cu and Ag) coated W powders. The effects of Cu and Ag coated W powders on the densification, microstructure and properties of the composites were investigated. The results indicated that the Cu-Ag coating promotes the sintering process and favors the low-temperature densification of W-Ag matrix composites. Moreover, the Cu-Ag coating benefited the formation of Cu-Ag solution and improved the interfacial bonding. The hardness of W-Ag matrix composites was increased to 260.0 HV by adjusting the composition of the material, and compressive strength can reach 799 MPa. The electrical conductivity can improve to 45.0% IACS. © 2022, The Authors. All rights reserved.

关键词： Microstructure

来源：评论

学校读者我要写书评

暂无评论

Soluble Ultra-High Molecular Weight Poly(4,4′-Diphenylether-5,5′-Bibenzimidazole) Based Membranes with Remarkable Mechanical Strength and Specific Proton Conductivity for High Temperature Proton Exchange Membrane Fuel Cells

SSRN

引用

SSRN 2023年

作者： Liu, Guoliang Wang, Ailian Ji, Wenxi Zhang, Longgui Wu, Jianing Zhang, Taoyi Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Research Institute of Chemical Industry Co. Ltd Beijing100013 China Hubei Key Laboratory of Fuel Cell Technology Wuhan University of Technology Wuhan430070 China

Reducing the thickness of membrane electrolyte is one important direction to improve Ohmic polarization and the according performance of high-temperature proton exchange membrane fuel cells for its widespread applications. Herein, we report that robust thin membranes can be formed using a soluble ether-contained poly(4,4′-diphenylether-5,5′-bibenzimidazole) with an ultra-high molecular weight of 170 kDa. Due to the enhanced chain entanglement of high molecular weight polymers, the formed thin membrane exhibits promising mechanical strength, thermal and oxidation stability. The optimized membrane with thickness of 61 µm and phosphoric acid uptake of 606 wt.% has the high specific proton conductivity of 25.9 S cm-2 at 160 oC under anhydrous conditions and mechanical strength of 11.2 MPa. The accordingly fabricated membrane electrode assembly delivers a peak power density of 0.544 W cm-2 with the open circuit voltage of 0.915 V at 160 oC using air as oxidant, outperforming the value of 0.522 W cm-2 for the commercial membrane electrode assembly with thickness of 250 µm and phosphoric acid uptake of 1018 wt.%. © 2023, The Authors. All rights reserved.

关键词： Proton conductivity

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：