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g-C_(3)N_(4) templated mesoporous carbon with abundant heteroatoms as high-rate anode material for dual-carbon sodium ion hybrid capacitors

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Journal of Materiomics 2022年第6期8卷 1149-1157页

作者： Chong Wang Qingtao Yu Ning Zhao Bohan Li Wanci Shen Feiyu Kang Zheng-Hong Huang Ruitao Lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Engineering Laboratory for Functionalized Carbon Materials Shenzhen Key Laboratory for Graphene-based MaterialsGraduate School at ShenzhenTsinghua UniversityShenzhen518055China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China

Sodium ion hybrid capacitors(SIHCs)are regarded as advanced power supply ***,the kinetics imbalance of cathode and anode suppresses the further performance improvement of *** carbonaceous anode materials are promising and many strategies have been utilized to increase the capacity of sloping region or accelerate the reaction rate of plateau ***,it is still challenging to simultaneously realize high mesopore/micropore volume ratio,large interlayer distance(>0.37 nm),and abundant and favorable heteroatoms-doping by a simple ***,we report N,P,O ternarydoped mesoporous carbon(PNPOC-T,T=700,800 or 900)with large interlayer distance(~0.4 nm)as anode *** PNPOC-T were prepared by a simple in-situ polymerization of aniline and phytic acid on the exfoliated graphitic nitrogen carbide(g-C3N4)and subsequent *** obtained PNPOC-800 exhibits an excellent rate performance(101.5 mA·h·g^(-1) at 20 A·g^(-1)),which can be attributed to the high surface-controlled capacitive behavior ratio and rapid ion *** optimum SIHCs display a high energy density of 105.48 W·h·kg^(-1) and a high power density of 13.59 kW$***,the capacitance retention rate of SIHCs can reach 87.43%after 9000 cycles at 1 A·g^(-1).

关键词： Sodium ion hybrid capacitors N/P/O ternary doping Mesoporous carbon Pseudocapacitive Rate performance

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Fracture mechanism of alumina-spinel castables containing ZrO2 by wedge splitting test and digital image correlation technique

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Ceramics International 2022年第11期48卷 15430-15438页

作者： Zhang, Liyuan Yu, Renhong Li, Jiwei Zhou, Jiwei Liu, Pengcheng Cao, Yingnan Zhang, Xiaohui Pan, Liping High Temperature Materials Research Institute Henan University of Science &Technology Luoyang471003 China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang471023 China State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co. Ltd. Luoyang471039 China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan430081 China

To clarify the fracture mechanism of alumina-spinel castables, two kinds of alumina-spinel castables with or without fused zirconia-alumina (FZA) were prepared. The full-field strains and crack propagation process in the region of interest (ROI) of alumina-spinel castables were investigated by wedge splitting test (WST) and digital image correlation (DIC) technique. Fractographic methods were used to analyze the crack propagation path of the castables after the WST. The results indicated that the load-displacement curve of alumina-spinel castables containing FZA exhibits a non-linear fracture, demonstrated typical ductile fracture;while that of alumina-spinel castables without FZA is linear, showed typical brittle fracture. The characteristic length reaches to 258.9 mm in FZA containing castables, more than 4 times that of the castables without FZA. In contrast, castables containing FZA has longer and more tortuous crack propagation path, larger damage zone length, which results in the increase of the dissipated energy. Crack branching can be observed around the main crack in castables containing FZA, meaning that microcracks toughening is the main mechanism for flexibility improvement of the alumina-spinel castables containing FZA, formation of micro-cracks can be attributed to the martensitic transformation of zirconia. © 2022 Elsevier Ltd and Techna Group S.r.l.

关键词： Image correlation

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Preparation of Silk Fibroin/Cellulose Blend Films

Preparation of Silk Fibroin/Cellulose Blend Films

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2020 Sustainability Innovation and Fashion technology International Conference, SIFTIC 2020

作者： Fan, Hongdou Huang, Ao Zhou, Shuiqing Hu, Zhanao Yan, Shuqin Zhang, Qiang State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China

Regenerated silk fibroin (SF) has excellent biocompatibility and degradability, but its mechanical properties need to be improved. As the most widely distributed and most abundant polysaccharide in nature, the advantage of cellulose material is its good strength and modulus. In this study, SF was dissolved in formic acid and calcium chloride solution. Then glycerol and ultrasonic microcrystalline cellulose were added, and the SF/cellulose blend film was prepared by the delayed flow method. The properties of the blend films were characterized by a series of tests such as electron microscope, FTIR, tensile strength, and so on. The results showed that when the ratio of cellulose to SF reached 30 to 70 and the addition of glycerol was 30% of the total solute, the properties of SF/cellulose blend films were the best. The addition of micro-nano-cellulose fiber improved the mechanical properties of the blend film, and the addition of glycerol greatly improved the flexibility of the blend film, which expanded the application of SF/cellulose blend films in the field of biomaterials. © Published under licence by IOP Publishing Ltd.

关键词： Glycerol

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银掺杂镍的硫醇盐类团簇用于非均相电催化二氧化碳还原

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Science China materials 2023年第1期66卷 407-412页

作者：田凡李旺轩郭文锦李广芳陈嵘 School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430205China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

精细调控具有原子尺度精确的团簇结构并将其应用于非均相催化研究,对于从分子水平阐明催化反应机制,明确催化反应活性位具有重要意义.本文基于环已硫醇保护的Ni_(4)团簇体系,成功制备了一种全新的Ni_(3)Ag_(2)双金属团簇,该团簇为Ni_(4... 详细信息

精细调控具有原子尺度精确的团簇结构并将其应用于非均相催化研究,对于从分子水平阐明催化反应机制,明确催化反应活性位具有重要意义.本文基于环已硫醇保护的Ni_(4)团簇体系,成功制备了一种全新的Ni_(3)Ag_(2)双金属团簇,该团簇为Ni_(4)团簇中一个Ni原子被两个Ag原子取代的结果.研究发现将该团簇用于非均相电催化二氧化碳还原,Ni_(3)Ag_(2)双金属团簇催化二氧化碳还原产生一氧化碳的法拉第效率可达90%以上,而母体结构Ni_(4)团簇的催化产物主要为氢气.对照实验与DFT理论计算结果表明,电解中去配体过程对于Ni_(3)Ag_(2)团簇的高选择性催化具有重要作用.其催化二氧化碳选择性还原的主要活性位为去配体后暴露出的Ni原子而非Ag原子.

关键词：非均相催化二氧化碳还原团簇结构活性位一氧化碳选择性催化选择性还原原子尺度

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Transverse Resonance Suppression of AlN-based Surface Acoustic Wave Resonators using Trench Structure

Transverse Resonance Suppression of AlN-based Surface Acoust...

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Yuanhang Qu Xiyu Gu Xiang Chen Min Wei Zesheng Liu Jiaqi Ding Yan Liu Chengliang Sun The Institute of Technological Science Wuhan University Wuhan China School of Physics and Technology Wuhan University Wuhan China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan China

ISBN: (数字)9798350371901

ISBN: (纸本)9798350371918

In recent years, aluminum nitride (AlN) has attracted considerable attention for its high acoustic velocity and stable piezoelectric properties at high temperatures, making it a promising material for high-performance SAW sensors. However, simulation studies have identified higher-order transverse Lamb wave modes in AlN-based SAW resonators. These spurious modes reduce the sensor’s quality (Q) factor and cause frequency interference, affecting the signal-to-noise ratio and transmission range. This study effectively excites the piston mode by etching part of the piezoelectric material in the gap region to form a trench structure. Simulation results show that the trench design effectively creates a waveguide structure, suppressing transverse spurious modes and improving the overall device performance. The proposed trench structure presents a viable approach for advancing AlN-based SAW wireless sensor technology.

关键词： Performance evaluation Wireless communication Temperature sensors Pistons Wireless sensor networks Simulation Surface acoustic waves Resonance Sensors Resonators

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Flexible and highly-sensitive pressure sensor based on controllably oxidized MXene

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InfoMat 2022年第9期4卷 60-71页

作者： Yanan Ma Yongfa Cheng Jian Wang Si Fu Mengjun Zhou Yue Yang Baowen Li Xin Zhang Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices&International School of Materials Science and EngineeringWuhan University of TechnologyWuhanChina School of Mathematics Physics and Optoelectronic EngineeringHubei University of Automotive TechnologyShiyanChina Center for Nanoscale Characterization&Devices(CNCD) Wuhan National Laboratory for Optoelectronics(WNLO)Huazhong University of Science and Technology(HUST)WuhanChina Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefeiChina State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijingChina

Conductive Ti_(3)C_(2)T_(x)MXenes have been widely investigated for the construction of flexible and highly-sensitive pressure *** the inevitable oxidation of solution-processed MXene has been recognized,the effect of the irreversible oxidation of MXene on its electrical conductivity and sensing properties is yet to be ***,we construct a highly-sensitive and degradable piezoresistive pressure sensor by coating Ti_(3)C_(2)T_(x)MXene flakes with different degrees of in situ oxidation onto paper substrates using the dipping-drying *** situ oxidation can tune the intrinsic resistance and expand the interlayer distance of MXene *** partially oxidized MXene-based piezoresistive pressure sensor exhibits a high sensitivity of 28.43 kPa^(-1),which is greater than those of pristine MXene,over-oxidized MXene,and state-of-the-art paper-based pressure ***,these sensors exhibit a short response time of 98.3 ms,good durability over 5000 measurement cycles,and a low force detection limit of 0.8 ***,MXene-based sensing elements are easily degraded and environmentally *** MXene-based pressure sensor shows promise for practical applications in tracking body movements,sports coaching,remote health monitoring,and human–computer interactions.

关键词： adjustable sensitivity in situ oxidation interlayer distance MXene pressure sensor

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In Situ Transmission Electron Microscopy and Three-Dimensional Electron Tomography for Catalyst Studies

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Chinese Journal of Structural Chemistry 2022年第10期41卷 56-76页

作者： Chen Sun Kuo Liu Jian Zhang Qian Liu Xijun Liu Lili Han College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China Institute for Advanced Study Chengdu UniversityChengdu 610106 China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China

An in-depth understanding of the catalytic reaction mechanism is the key to designing efficient and stable catalysts. In situ transmission electron microscope(TEM) is the most powerful tool to visualize and analyze the microstructures of catalysts during catalysis. In situ TEM combined with three-dimensional(3D) electron tomography(ET) reconstruction technique enables interrogations of catalysts’ structural dynamics and chemical changes in high temporal and spatial dimensions. In this review, we discuss and summarize the recent advances in in situ TEM together with 3D ET for catalyst studies. Topics include the latest research progress of in situ TEM imaging as well as 3D visualization and quantitative analysis of catalysts. We also pay particular attention to artificial intelligence(AI)-enhanced smart 3D ET. These include deep learning(DL)-based data compression and storage for the analysis of large TEM data, recovery of wedge-shaped information lost in 3D ET reconstructions, and DL models for reducing residual artifacts in 3D reconstructed images. Finally, the challenges and development prospects of current in situ TEM and 3D ET research are discussed.

关键词： in situ TEM catalyst electron tomography 3D reconstruction artificial intelligence machine learning

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Simulation of Weft Knitted Fabric Using Three-Dimensional Yarn Loops and Grid and Spring Mass Models

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Advances in materials Science and Engineering 2023年第1期2023卷

作者： Hu, Haodong Li, Tong Ke, Wei Wang, Lijing Deng, Zhongmin State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Hubei Wuhan430200 China School of Fashion and Textiles RMIT University 25 Dawson St MelbourneVIC3056 Australia

The existing knitted fabric simulation methods cannot be effectively applied to three-dimensional (3D) modeling and simulation of weft knitted garments due to the lack of simple and convenient 3D dynamic simulation models for weft knitted fabrics. This paper presents a method of constructing a loop model by coupling the grid model with the spring mass model. The simulation of weft knitted fabric with real effects was achieved through the coupled model construction of the loop model combined with the yarn simulation generation algorithm and yarn collision response algorithm. The method presented in this paper can quickly and simply simulate the design of weft knitted clothing with loop structure. It provides a reference for the 3D simulation design of weft knitted fabric. © 2023 Haodong Hu et al.

关键词： Wool

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Ultralight Ppy@Pva/Bc/Mxene Composite Aerogels for High-Performance Supercapacitor Electrodes and Pressure Sensors

SSRN

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SSRN 2023年

作者： Zheng, Wenfeng Yang, Yuan Fan, Lingling Ye, Dezhan Xu, Weilin Xu, Jie State Key Lab for Hubei New Textile Materials and Advanced Processing Technology College of Materials Science & Engineering College of Textile Science & Engineering Wuhan Textile University Wuhan430200 China

Directional freezing is an efficient approach to design anisotropic materials with surface void and well-defined aligned channels along the freezing direction for charge transmission and ion diffusion. Herein, poly(vinyl alcohol) (PVA)/bacterial cellulose (BC)/MXene (PBM) composite aerogels are prepared via directional freezing. The aligned porous architecture of PBM not only enables uniform loading and high accessibility of PPy through the aerogel network, but also ensures efficient penetration and fast transport of electrolytes. The as-prepared PPy@PVA/BC/MXene (PPy@PBM) aerogel electrodes show a high areal specific capacitance of 3948 mF cm-2 at 0.47 mA cm-2, a desirable energy density 178 μWh cm-2 at a power density of 951 μW cm-2 and excellent cycling stability (105% capacitance retention after 5000 cycles). In addition, the PPy@PBM aerogels demonstrate high sensitivity (313.2 kPa-1 in 200 to 3000 Pa pressure range), ultralow detection limit ( © 2023, The Authors. All rights reserved.

关键词： Aerogels

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Photocatalytic water splitting versus H_(2) generation coupled with organic synthesis:A large critical review

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Chinese Journal of Catalysis 2025年第3期70卷 44-114页

作者： Oleksandr Savateev Jingru Zhuang Sijie Wan Chunshan Song Shaowen Cao Junwang Tang Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Industrial Catalysis Center Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Photocatalytic water splitting using natural solar light is considered as a sustainable approach to generate H_(2) and O_(2).While H_(2) has high market value,the by-product of water splitting,oxygen,is less *** make H_(2) produced by means of photocatalysis more economically competitive to that generated from methane,its generation is studied together with synthesis of organic compounds that have higher market *** review summarizes and analyzes critically dehydrogenation reactions that were developed since *** dehydrogenation reactions are classified and the results are collected in the online *** of homogeneous and heterogenous photocatalysts in dehydrogenation reactions,such as yield rates of organic products on analytical and preparative scales,and quantum efficiencies are *** limitations of the existing methods and photocatalytic systems are identified and directions for the future developments are outlined.

关键词： Acceptorless dehydrogenation Photocatalysis Photoredox catalysis Hydrogen Organic synthesis

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