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Atomic defects,functional groups and properties in MXenes

Chinese Chemical Letters 2021年第1期32卷 339-344页

作者： Wenjun Cui Zhi-Yi Hu Raymond RUnocic Gustaaf Van Tendeloo Xiahan Sang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan 430070China Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831United States EMAT(Electron Microscopy for Materials Science) University of AntwerpAntwerpB-2020Belgium

MXenes,a new family of functional two-dimensional(2 D) materials,have shown great potential for an extensive variety of applications within the last *** defects and functional groups in MXenes are known to have a tremendous influence on the functional *** this review,we focus on recent progress in the characterization of atomic defects and functional group chemistry in MXenes,and how to control them to directly influence various properties(e.g.,electron transport,Li^(+) adsorption,hydrogen evolution reaction(HER) activity,and magnetism) of 2 D MXenes *** structural transformations such as oxidation and growth induced by atomic defects in MXenes are also *** review thus provides perspectives on property optimization through atomic defect engineering,and bottom-up synthesis methods based on defect-assisted homoepitaxial growth of MXenes.

关键词： MXenes Atomic defects Surface functional groups Electron microscopy Functional properties

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Bending and Vibration Analysis of Multi-Directional Functionally Graded Thick Plates Described by Trigonometric Functions Via a Novel Third-Order Shear Deformation Theory and Isogeometric Analysis

SSRN

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SSRN 2023年

作者： Chen, Fei Zhao, Xiaofei Huang, Zhifeng Lei, Jun Zhang, Chi Wen, Pin 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 Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Wuhan430070 China Department of Engineering Mechanics Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing China

This paper introduces a material model for a multi-directional functionally graded plate described by trigonometric functions, equipped with four parameters to control diverse material distributions effectively. The bending and vibration analysis of multi-directional functionally graded plates is carried out utilizing the Isogeometric Analysis, which is based on a novel third-order shear deformation theory (TSDT) to account for transverse shear deformation. The present TSDT, founded on a rigorous kinematic of displacements, is demonstrated to surpass other preceding theories. It is derived from an elasticity formulation, rather than relying on the hypothesis of displacements. The effectiveness of the proposed method is verified by comparing its numerical results with those of other methods reported in the relevant literature. Numerical examples are presented and discussed, in which the effects of gradient parameters, periodic parameter, length-to-thickness ratio, and boundary conditions on deflection, stress, and natural frequencies are investigated. © 2023, The Authors. All rights reserved.

关键词： Vibration analysis

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Durotaxis and Topotaxis Orchestrated Guidance on Cell Migration in 3D Printed Scaffold/Hydrogel Composite

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Additive Manufacturing Frontiers 2024年第2期3卷 224-231页

作者： Baichuan Deng Zhiwei Huang Xianglin Zhang Kai Ren Wen Feng Lu Jerry Ying Hsi Fuh Xinghuang Liu Tao Bai Bin Wu State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou310027China Department of Mechanical Engineering National University of SingaporeSingapore117575Singapore Division of Gastroenterology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Printing three-dimensional(3D)scaffolds with suitable mechanical cues is an effective strategy for guiding tissue regeneration by inducing cell migration and ***,many studies considered only one type of cue for 3D tissue engineering scaffold fabrication,such as topological cues,which is *** realize durotaxis-and topotaxis-orchestrated guidance on cell migration,a 3D printed scaffold/hydrogel composite was fabricated in this *** porous scaffold provided a topological cue(topotaxis),and the combined hydrogel provided a compliance cue(durotaxis).The results indicated that the thin fibers of the scaffold induced cell migration,and the larger pore size and directed fiber number of the scaffold led to more uniform cell orientation(topotaxis).Furthermore,when collagen was cured to cover the scaffold to result in a compliance change,the cells in the collagen still sensed the scaffold topological cue and migrated along it(durotaxis).Collagen also provides a living space and nutrition for cells,thereby significantly increasing their *** effects of durotaxis and topotaxis synthesis provide a promising solution for tissue engineering scaffold applications.

关键词： Tissue engineering scaffold Topological cue Compliance cue Cell migration

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3D-Printed Superhydrophobic and Magnetic Device That Can Self-Powered Sense A Tiny Droplet Impact

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Engineering 2022年第8期8卷 196-205页

作者： Xuan Zhang Qi Wang Ruiping Zou Bo Song Chunze Yan Yusheng Shi Bin Su State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China ARC Research Hub for Computational Particle Technology Department of Chemical EngineeringMonash UniversityClayton VIC 3800Australia

Three-dimensional(3D)-printed magnetic soft architectures have attracted extensive attention and research from the engineering and material *** force-driven shape deformation of such architectures causes a change in the magnetic field distribution,indicating the capability to convert mechanical energy to ***,we fabricate a flexible superhydrophobic and magnetic device by integrating two kinds of 3D printing *** 3D-printed magnetic device(3DMD)exhibits a long-term stable mechanoelectrical conversion capacity under consecutive water droplet *** output current of the 3DMD is higher than that of records in the existing *** with Maxwell numerical simulation,the mechanoelectrical conversion mechanism of the 3DMD is investigated,further guiding regulation of the diverse ***,three 3DMDs are integrated to light up a commercial light-emitting diode(LED)by a stream of collected *** a combined design incorporating energy conversion is believed to promisingly motive advances in the 3D printing field.

关键词： 3D printing Self-powered sensing Magnetic Waterdrops

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Transmittance improvement and photocatalyst performance of complex environment tolerant SiO2-TiO2 thin film on photovoltaic glass

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Ceramics International 2025年

作者： Liu, Jiacheng Zhang, Mengya Zhang, Jihong Zhang, Qinghuang Han, Jianjun Xie, Jun Cao, Shaowen State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China Hepu Research Center for Silicate Materials Industry Technology 27 Huanzhu Avenue Hepu County Beihai536100 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China

The transmittance and surface condition of photovoltaic cover glass determine the energy conversion efficiency of specific solar cells modulus. In this study, TiO2-SiO2 based complex thin film were fabricated on PV glass and the transmittance, self-cleaning, and environmental tolerance performances were investigated. TiO2-SiO2 based precursors with different SiO2 contents and additives were prepared using sol-gel method, and coated on photovoltaic glass substrates by spin-coating technique with optimized parameters for thin film fabrication. The microstructure analysis reveals the decreasing rutile TiO2 crystalline with higher SiO2 content in thin film probably due to lower TiO2 content and the formation of Ti-O-Si bond, which impedes TiO2 crystal growth. The morphologies and elements distribution of thin film proves the formation of SiO2/TiO2 core-shell like structure in thin film. The transmittance of coated photovoltaic glass in visible range is improved from 91.60 % to 93.94 %, with optimized TiO2/SiO2 ratio. Accordingly, the monocrystalline silicon solar cell conversion efficiency increases from 16.35 % to 16.68 %, about 0.33 % efficiency increase due to TiO2-SiO2 thin film coating. In addition, the thin film shows excellent photocatalyst behavior from 95.40 % methylene blue dye degradation rate under Xeon lamp irradiation, and super hydrophilic property from 0° contact angle, which confirms the excellent self-cleaning performance. The transmittance of coated photovoltaic glass recovers from less than 80 % with MB simulated pollutant contamination, to 92.97 % after degradation under Xeon lamp irradiation, and the solar cell conversion efficiency changes from 13.15 % to 16.55 %. In addition, the transmittance and solar cell conversion remain almost unchanged after low temperature freezing, and slightly decrease from first time sand scrubbing then keep stable with more cycles. The results indicate the excellent anti-pollution, low temperature tolerance, and wear

关键词： Energy conversion efficiency

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Machine Learning Assisted Design of Natural Rubber Composites with Multi⁃Performance Optimization

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Journal of Harbin Institute of technology(New Series) 2023年第1期30卷 35-51页

作者： Song Pang Yang Yu Huanhuan Liu Youping Wu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials Beijing University of Chemical TechnologyBeijing 100029China Beijing Engineering Research Center of Advanced Elastomers Beijing University of Chemical TechnologyBeijing 100029China

Multi⁃performance optimization of tread rubber composites is a key issue of great concern in automotive *** experimental design approach via“trial and error”or intuition is ineffective due to mutual inhibition among multiple properties.A“Uniform design⁃Machine learning”strategy for performance prediction and multi⁃performance optimization of tread rubber composites was *** wear resistance,rolling resistance,tensile strength and wet skid resistance were simultaneously optimized.A series of feasible optimization designs were screened via statistical analysis and machine learning analysis,and were experimentally *** verification experiments demonstrate that the optimization design via machine learning analysis meets the optimization requirements of all target performance,especially for Akron abrasion and 60℃tanδ(about 21%and 9%lower than the design targets,respectively)due to the inhibition of mechanical degradation and good dispersion of fillers.

关键词： machine learning multi⁃performance optimization natural rubber wear resistance

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TiNB 0.8O 4 Microspheres with Pseudocapacitive Properties for Fast-Charging and Durable Sodium Storage

SSRN

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SSRN 2024年

作者： Li, Xinyuan Zhang, Tianyi Chen, Zhuo Fan, Hao Hu, Ping Cai, Congcong Zhou, Liang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China

Titanium niobium oxides (TNO) are promising anode materials for sodium-ion batteries (SIBs) due to their efficient ion diffusion channels. However, their poor electronic conductivity and severe volume expansion during Na+ (de-)intercalation impede the longevity of SIBs. To address these issues, the core@shell TiNb0.8O4/C@C microspheres (TNO/C@C) have been developed to enhance electron conduction and Na+ diffusion. The TNO/C@C, featuring a dual conductive configuration, outperforms pure TNO and other variations like TNO/C and TNO@C that rely solely on either bulk or surface electronic conductors. Thus, the TNO/C@C anode material achieves a fast-charging rate of 200 C, allowing full charging in 2 seconds, and demonstrates long-term stability over 5000 cycles. In-situ Raman analysis reveals a zero-strain feature during sodiation/desodiation, which minimizes structural degradation over repeated cycles. In-situ EIS test indicates low electron resistance, enhancing both the rate capability and stability. Therefore, the bulk and surface dual conducting strategy offers new insights into robust and fast-charging SIBs. © 2024, The Authors. All rights reserved.

关键词： Sodium-ion batteries

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Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan Ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water ***,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass *** as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER *** current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

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Enhanced Dynamic Phase Stability and Suppressed Mn Dissolution in Low-Tortuosity Spinel LMO Electrode

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Energy Material Advances 2022年第1期2022卷 24-32页

作者： Renjie He Sheng Lei Mengchuang Liu Mingsheng Qin Wei Zhong Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074P.R.China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

Microspinel LiMn_(2)O_(4)(LMO)is a widely used cathode material in power lithium-ion ***,inevitable Mn dissolution and dynamic phase instability will cause the degradation of microspinel LMO during ***,a low-tortuosity LMO(LMO-LT)electrode is fabricated by an ice-templating method,which exhibits enhanced dynamic phase stability,alleviated Mn dissolution,and rare particle microcracks during *** is shown that the low-tortuosity electrode enables fast lithium-ion diffusion and thus small concentration polarization,leading to uniform electrochemical reaction within microregions of the LMO-LT ***,the fast lithium-ion transport kinetics and even mesoscopic scale reactions of the LMO-LT electrode effectively alleviate irreversible phase transition and Mn dissolution as well as suppress crack generation in LMO *** a result,the full cell[negative-to-positive capacity ratio(N/P)=1.1]with thick LMO-LT cathode(13 mg cm^(−2))and Li_(4)Ti_(5)O_(12) anode sustains 80.0%capacity over 200 *** LMO-LT electrode further delivers 78.9%capacity of that at 0.1 C at the high rate of 5 *** work provides an important strategy to enhance dynamic phase stability and suppress Mn dissolution at the mesoscopic scale,promoting the development of high-performance LMO electrodes.

关键词： electrode lithium kinetics

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Mg-Based Micromotors with Motion Responsive to Dual Stimuli

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Research 2020年第1期2020卷 966-977页

作者： Kang Xiong Leilei Xu Jinwei Lin Fangzhi Mou Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

Mg-based micromotors have emerged as an extremely attractive artificial micro/nanodevice,but suffered from uncontrollable propulsion and limited motion lifetime,restricting the fulfillment of complex ***,we have demonstrated Mg-based micromotors composed of Mg microspheres asymmetrically coated with Pt and temperature-sensitive poly(N-isopropylacrylamide)(PNIPAM)hydrogel layers in *** can implement different motion behaviors stemming from the driving mechanism transformation when encountering catalyzed substrates such as H_(2)O_(2) and respond to both H_(2)O_(2) concentration and temperature in aqueous *** as-constructed Mg-based micromotors are self-propelled by Pt-catalyzed H_(2)O_(2) decomposition following the self-consuming Mg-H_(2)O *** this case,they could further generate bilateral bubbles and thus demonstrate unique self-limitation motion like hovering when the phase transformation of PNIPAM is triggered by decreasing temperature or when the H_(2)O_(2) concentration after permeating across the PNIPAM hydrogel layer is high enough to facilitate bubble *** work for the first time provides a stimuli-induced“hovering”strategy for self-propelled micromotors,which endows Mg-based micromotors with an intelligent response to the surroundings besides the significant extension of their motion lifetime.

关键词： transformation consuming attractive

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