检索结果-内蒙古大学图书馆

Biomimetic multi-layered protective materials with prestress and a periodic laminated structure

Journal of Materiomics 2025年

作者： Xin Liu Fan Zhang Ji Zou Weimin Wang Wei Ji Zhengyi Fu Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang 441138 Hubei China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The nacreous layer of shells has become an excellent biomimetic template of materials due to its unique structure. Inspired by the highly complex multilayered structure of shells, biomimetic layered composite protective materials with outstanding strength, toughness, and impact resistance have been developed. As the hard phase in biomimetic pearlescent layered protective materials, ceramics suffer from inherent low toughness. Applying prestress proved to be an efficient method to enhance their toughness and impact resistance. In this study, prestressed biomimetic periodic laminated (TiB 2 –TiB)/Ti protective materials were fabricated with spark plasma sintering (SPS) technology under the conditions of 1450 °C and 30 MPa in an argon atmosphere. Moreover, both experimental and numerical simulation analyses were conducted to investigate their protective performance. Compared to non-prestressed protective materials, the prestressed constrained materials exhibited the significantly improved protective performance with reduced penetration depth, substantially lower residual velocity, and kinetic energy after impact. This study provided valuable insights into the structural design and performance optimization of other protective materials.

关键词： (TiB 2 -TiB)/Ti Bionic Pre-stress Protective performance Simulation modeling

来源：评论

学校读者我要写书评

暂无评论

Numerical Investigation and Experimental Validation of Water Condensation in the Gas Diffusion Layer with Different Properties

SSRN

引用

SSRN 2022年

作者： Zhang, Heng Sarker, Mrittunjoy Rahman, Md Azimur Zhan, Zhigang Sui, Pang-Chieh Chuang, Po-Ya Abel Mechanical Engineering University of California Merced MercedCA95343 United States Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China

Liquid water in the porous media hinders the transport of reactant to the catalyst layer, where the electrochemical reactions occur, which in turn, reduces performance and lifetime of a PEMFC. In this study, two different types of gas diffusion layer (GDL) materials are used to study the two-phase saturation distribution in a PEMFC. The correlations between the effective and anisotropic transport properties and porosity of the two GDLs are solved by the pore scale model. In addition, the anisotropic liquid water permeability and the relationship between saturation and capillary pressure is determined by using the Lattice-Boltzmann method. Fuel cell performance as well as liquid water distribution in the GDL using neutron radiography are obtained for validation. Under wet conditions, the cell with Freudenberg GDL performs better than that using Toray GDL, especially at high current densities. The results of the two-phase model simulation show that the peak water saturation for Toray GDL occurs in the catalyst layer and can reach 40%, while the peak water saturation for Freudenberg GDL occurs inside the GDL directly under the ribs and only reaches 25% saturation. The combined results provide key insights to enable high power operation of a PEMFC through GDL material optimization. © 2022, The Authors. All rights reserved.

关键词： Proton exchange membrane fuel cells (PEMFC)

来源：评论

学校读者我要写书评

暂无评论

One-Pot Annealing Preparation of Imidazole Ring-Doped Graphitic Carbon Nitride with Enhanced Peroxidase-Like Activity for Glucose Detection

SSRN

引用

SSRN 2022年

作者： Gao, Xueyou Xue, Hang Zhou, Yue Chen, Yuanyuan Peng, Jian Biomedical Materials and Engineering Research Center of Hubei Province State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Orthopaedics Union Hospital Tongji Medical College Huazhong University of Science andTechnology Wuhan430022 China Department of Pharmacology Medical College Wuhan University of Science and Technology Wuhan430022 China

Peroxidase-like activity of artificial enzymes has been widely used for biosensing. However, the peroxidase-like activity of artificial enzymes is far from satisfactory in contrast to natural enzymes. Herein, by imitating the structure of natural enzymes, we propose a one-pot annealing process to prepare imidazole ring-doped graphitic carbon nitride with enhanced peroxidase-like activity. By adding histidine during calcination, the graphite-phase carbon nitride doped with imidazole rings (g-C3N4-His) is obtained, which shows enhanced peroxidase-like activity by 46.5 times compared to bare g-C3N4. Furthermore, imidazole rings from g-C3N4-His make it possible to anchor Cu(II) active sites on it to produce g-C3N4-His-Cu, which show another 3 times increased peroxidase-like activity. It should be noted that the as-prepared g-C3N4-His-Cu could work in wide pH (4-9) and low temperature (5 oC). The ultrahigh peroxidase-like activity is attributed to the electronic effect of imidazole rings and active sites of Cu(II) for ·OH production. Based on the enhanced peroxidase-like activity, a H2O2 and glucose biosensor is developed with high sensitivity (limit of detection 10 nM) and selectivity. Therefore, the biosensor shows potential applications in diabetic diagnosis in clinic. © 2022, The Authors. All rights reserved.

关键词： Glucose

来源：评论

学校读者我要写书评

暂无评论

Double-headed brush CsPbI 3 nanorod assemblies for high non-filtered linear polarization in optical displays

引用

Nano Energy 2025年 142卷

作者： Chengqi Liu Xiaoqian Wang Zisheng Tang Yanhui Jiao Dafu Zhao Manrui Liu Qi Zhang Damin Liu Zhe Pang Jiazhen He Hang Li Zhao Deng Kang Song Dongyuan Zhao Yong Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China Department of Chemistry Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai 200433 China

Metal halide perovskite materials exhibit significant potential for linear polarization applications owing to their unique chemical composition, crystal structure, and exceptional optoelectronic properties. However, their intrinsic soft ionic nature, arising from dynamic lattice behavior and weak ionic bonding, presents substantial challenges in achieving precise control over assembly morphology, thereby limiting their effectiveness in linear polarization applications. Here, we report the synthesis of CsPbI 3 perovskite nanorod assemblies with a distinctive "double-headed brush" morphology via a one-step hot-injection method. This unique remote assembly structure, featuring feather-like protrusions at both ends and an enhanced moment of inertia, effectively stabilizes the horizontal orientation distribution of nanorod assemblies in solution. Consequently, the "double-headed brush" nanorod assemblies demonstrate remarkable emission anisotropy, achieving a high linear polarization degree of approximately 0.52. This study showcases precise morphological control over CsPbI 3 nanorod assemblies, leveraging the non-filtered linear polarization properties of the double-headed brush architecture, and underscores the promising potential of CsPbI 3 perovskite materials for advancing next-generation optical display.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Anomalous Nernst Effect in an Antiperovskite Antiferromagnet

引用

Physical Review Applied 2022年第2期18卷 024007-024007页

作者： Yunfeng You Hei Lam Caihua Wan Chunlei Wan Wenxuan Zhu Lei Han Hua Bai Yongjian Zhou Leilei Qiao Tongjin Chen Feng Pan Junwei Liu Cheng Song Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Physics Hong Kong University of Science and Technology Hong Kong 00852 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The anomalous Nernst effect (ANE), the generation of a transverse electric voltage by a longitudinal temperature gradient, has attracted increasing interest from researchers recently, due to its potential in thermoelectric power conversion and close relevance to the Berry curvature of the band structure. Avoiding the stray field of ferromagnets, the ANE in antiferromagnets (AFMs) has the advantage of realizing highly efficient and densely integrated thermopiles. Here, we report the observation of the ANE in an antiperovskite noncollinear AFM, Mn3SnN, experimentally, which is triggered by the enhanced Berry curvature from Weyl points located close to the Fermi level. Considering that antiperovskite Mn3SnN has a rich magnetic phase transition, we modulate the noncollinear AFM configurations by the biaxial strain, which enables us to control its ANE. Our findings provide a potential class of materials to explore the Weyl physics of noncollinear AFMs as well as realizing antiferromagnetic spin caloritronics that exhibits promising prospects for energy conversion and information processing.

关键词： Electronic structure Magnetic phase transitions Magnetotransport Nernst effect Spin caloritronics Thermoelectric generators Antiferromagnets Noncollinear magnets

来源：评论

学校读者我要写书评

暂无评论

Interfacial co-existence of oxygen and titanium vacancies in nanostructured TiO2 for enhancement of carrier transport

引用

Nanoscale 2020年第15期12卷 8364-8370页

作者： Yi Lu Yi-Xuan Liu Li He Li-Ying Wang Xiao-Long Liu Jia-Wen Liu Yuan-Zhou Li Ge Tian Heng Zhao Xiao-Hang Yang Jie Liu Christoph Janiak Silvia Lenaerts Xiao-Yu Yang Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering Wuhan University of Technology Wuhan 430070 China. xyyang@***.

The interfacial co-existence of oxygen and metal vacancies in metal oxide semiconductors and their highly efficient carrier transport have rarely been reported. This work reports on the co-existence of oxygen and titanium vacancies at the interface between TiO and rGO via a simple two-step calcination treatment. Experimental measurements show that the oxygen and titanium vacancies are formed under 550 °C/Ar and 350 °C/air calcination conditions, respectively. These oxygen and titanium vacancies significantly enhance the transport of interfacial carriers, and thus greatly improve the photocurrent performances, the apparent quantum yield, and photocatalysis such as photocatalytic H production from water-splitting, photocatalytic CO reduction and photo-electrochemical anticorrosion of metals. A new "interfacial co-existence of oxygen and titanium vacancies" phenomenon, and its characteristics and mechanism are proposed at the atomic-/nanoscale to clarify the generation of oxygen and titanium vacancies as well as the interfacial carrier transport.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Holey platinum nanotubes for ethanol electrochemical reforming in aqueous solution

引用

Science Bulletin 2021年第20期66卷 2079-2089,M0003页

作者： Tian-Jiao Wang Hui-Ying Sun Qi Xue Ming-Jun Zhong Fu-Min Li Xinlong Tian Pei Chen Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710062China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China

The catalytic/electrocatalytic performance of platinum(Pt)nanostructures highly relates to their ***,we propose a facile self-template pyrolysis strategy at high temperature to synthesize one-dimensionally holey Pt nanotubes(Pt-hNTs)using Pt^(Ⅱ)-dimethylglyoxime complex(Pt^(Ⅱ)-DMG)nanorods as the reaction *** coordination capability of DMG results in the generation of Pt^(Ⅱ)-DMG nanorods,whereas the reducibility of DMG at high temperature leads to the reduction of Pt^(Ⅱ)species in Pt^(Ⅱ)-DMG *** the reaction process,the inside-out Ostwald ripening phenomenon leads to the hollow morphology of *** from the physical characteristics of hollow and holey structure,Pt-hNTs with clean surface show superior electroactivity and durability for catalyzing ethanol electrooxidation as well as hydrogen evolution reaction in alkaline *** optimized experimental conditions,the constructed symmetric Pt-hNTs||Pt-hNTs ethanol electrolyzer only requires an electrolysis voltage of 0.40 V to achieve the electrochemical hydrogen production,demonstrating a highly energy saving strategy relative to traditional water electrolysis.

关键词： Holey platinum nanotubes High temperature pyrolysis Ethanol electrochemical reforming Ethanol oxidation reaction Hydrogen production

来源：评论

学校读者我要写书评

暂无评论

In situ synthesis of oriented Zn-Mn-Co-telluride on precursor free CuO: An experimental and theoretical study of hybrid electrode paradigm for advanced supercapacitors

引用

Nano materials Science 2024年

作者： Ahmad, Muhammad Nawaz, Tehseen Hussain, Iftikhar Chen, Xi Khan, Shahid Ali Eddahani, Yassine Abraham, B. Moses Ali, Shafqat Wang, Ci Zhang, Kaili Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University 3141 Chestnut Street PhiladelphiaPA19104 United States Department of Chemistry The University of Hong Kong Hong Kong Department of Chemical Engineering Indian Institute of Technology Kanpur Kanpur208016 India State Key Laboratory of New Textile Materials and Advanced Processing Technologies National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Key Lab of In-fiber Integrated Optics Ministry Education of China Harbin Engineering University Harbin150001 China

The evolution of energy storage technology has seen remarkable progress, with a shift from pure metals to sophisticated, tailor-made active materials. The synthesis of nanostructures with exceptional properties is crucial in the advancement of electrode materials. In this regard, our study highlights the fabrication of a novel, oriented heterostructure comprised of Zn-Mn-Co-telluride grown on a pre-oxidized copper mesh using a hydrothermal method followed by a solvothermal process. This innovative approach leads to the formation of the Zn-Mn-Co-telluride@CuO@Cu heterostructure, which demonstrates the unique oriented morphology. It outperforms both Zn-Mn-Co-telluride@Cu and CuO@Cu by exhibiting lower electrical resistivity, increased redox activity, higher specific capacity, and improved ion diffusion characteristics. The conductivity enhancements of the heterostructure are corroborated by density functional theory (DFT) calculations. When utilized in a hybrid supercapacitor (HSC) alongside activated carbon (AC) electrodes, the Zn-Mn-Co-telluride@CuO@Cu heterostructure-based HSC achieves an energy density of 75.7 Wh kg−1. Such findings underscore the potential of these novel electrode materials to significantly impact the design of next-generation supercapacitor devices. © 2024 Chongqing University

关键词： Electrodes

来源：评论

学校读者我要写书评

暂无评论

Microwave plasma etching of SS304 substrates for improved PVD coating adhesion

引用

Applied Surface Science 2025年 708卷

作者： Liu, Wenxin Xu, Zhigang Peng, Jian Wang, Chuanbin Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Hubei Wuhan430070 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Fabricating microstructures on a substrate surface enhances surface roughness, improving the adhesion of physical vapor deposition (PVD) coatings. Currently, plasma etching is widely used to improve substrate surface roughness. However, it suffers from limitations such as low etching efficiency and substrate damage. This study explores microwave plasma etching as an innovative approach to enhance surface roughness, combined with magnetron sputtering to improve coating adhesion. The effects of etching time on substrate morphology, roughness, and wettability are systematically analyzed, along with their influence on chromium (Cr) coating properties. Results show that microwave plasma etching increases surface roughness and wettability without altering the substrate's phase structure. The crystallographic orientation of Cr coatings is less affected by the substrate surface roughness. Indentation and scratch tests are conducted to evaluate the adhesion strength under dynamic and static conditions. When the etching time is 2 h and the substrate surface roughness is 10.5 nm, the adhesion strength between the coating and the substrate reaches a maximum of 42.7 N, which is nearly a 100 % improvement compared to the adhesion strength of the polished substrate. This study demonstrates an effective method for improving substrate roughness and provides insights into enhancing the coating adhesion. © 2025 Elsevier B.V.

关键词： Surface roughness

来源：评论

学校读者我要写书评

暂无评论

Hypervalent Potassium Xanthate Modified Sno2 for Highly Efficient Perovskite Solar Modules

SSRN

引用

SSRN 2022年

作者： Lu, Jianfeng Lv, Pin Yang, Yufei Li, Neng Zhang, Yuxi Hu, Min Huang, Bo Zhu, Yanqing Li, Bin Pan, Junye Wang, Shifeng Huang, Fuzhi Cheng, Yi-Bing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China School of Electronic and Electrical Engineering Hubei Province Engineering Research Center for Intelligent Micro-Nano Medical Equipment and Key Technologies Wuhan Textile University Wuhan430200 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Foshan528216 China Innovation Laboratory of Materials for Energy and Environment Technologies Institute of Oxygen Supply Tibet University Lhasa850000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Tin oxide (SnO2) has been demonstrated as a promising electron transport material for high efficiency perovskite solar cells (PSCs) that made entirely via solution processing at low temperature (2|perovskite lead to a large voltage loss and performance variation. Herein, we present a facile and effective method to simultaneously reduce the interfacial defects and enhance the charge transfer via modification of SnO2 by hypervalent potassium xanthate. The presence of Lewis acidic centers of the sulfur ligands, gives rise to a strong hypervalent interactions with both Pb2+ on the perovskite and Sn4+ on the SnO2 surface, which accelerates the interfacial charge transfer and suppresses the recombination reaction. As a result, solar cells with a power conversion efficiency of 23.4% with negligible hysteresis are fabricated in light of significantly increased voltage in comparison with the relevant controls. Moreover, a stabilized efficiency of 18.8% for large-area (active area: 48.0 cm2) perovskite solar modules is achieved. The modules retain 90% of their initial performance after aging at ambient for 600 hours, which is substantially improved in comparison with the modules based on pristine SnO2 © 2022, The Authors. All rights reserved.

关键词： Perovskite solar cells

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：