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Ultra-thin metal-organic framework nanoribbons

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National Science Review 2020年第1期7卷 46-52页

作者： Bingqing Wang Meiting Zhao Liuxiao Li Ying Huang Xiao Zhang Chong Guo Zhicheng Zhang Hongfei Cheng Wenxian Liu Jing Shang Jing Jin Xiaoming Sun Junfeng Liu Hua Zhang State Key Laboratory of Chemical Resource engineering Beijing University of Chemical Technology Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Department of Chemistry City University of Hong Kong

structure engineering of metal-organic frameworks(MOFs) at the nanometer scale is attracting increasing interest due to their unique properties and new functions that normally cannot be achieved in bulk MOF crystals. Here, we report the preparation of ultra-thin MOF nanoribbons(NRBs) by using metal-hydroxide nanostructures as the precursors. Importantly, this general method can be used to synthesize various kinds of ultra-thin MOF NRBs, such as MBDC(M = Co, Ni; BDC = 1,4-benzenedicarboxylate), NiCoBDC,CoTCPP(TCPP = tetrakis(4-carboxyphenyl)porphyrin) and MIL-53(Al) NRBs. As a proof-of-concept application, the as-prepared ultra-thin Co BDC NRBs have been successfully used as a fluorescent sensing platform for DNA detection, which exhibited excellent sensitivity and selectivity. The present strategy might open an avenue to prepare MOF nanomaterials with new structures and unique properties for various promising applications.

关键词： metal-organic frameworks nanoribbons metal-hydroxide nanostructures structure engineering DNA detection

Two-in-one shell configuration for bimetal selenides toward fast sodium storage within broadened voltage windows

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Carbon Energy 2022年第4期4卷 586-597页

作者： Zichao Yan Lingfei Zhao Yaru Liang Lei Zhang Hanwen Liu Zhiqiang Zhu Yunxiao Wang Shu-Lei Chou State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangshaChina Institute for Superconducting&Electronic Materials University of WollongongInnovation CampusNorth WollongongNew South WalesAustralia School of Materials Science and engineering Xiangtan UniversityHunanXiangtan CityChina Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouZhejiangChina

The shell structure design has been recognized as a highly efficient strategy to buffer the severe volume expansion and consecutive pulverization of conversion-type anodes.Nevertheless,construction of a functional shell with a stabilized structure that meets the demands of both high electronic conductivity and feasible pathways for Na^(+)ions has been a challenge so far.Herein,we design a two-in-one shell configuration for bimetal selenides to achieve fast sodium storage within broadened voltage windows.The hybridized shell,which benefits from the combination of titanium dioxide quantum dots and amorphous carbon,can not only effectively buffer the strain and maintain structural integrity but also allow facile and reversible transport of electrons and Na^(+)uptake for electrode materials during sodiation/desodiation processes,resulting in increased reaction kinetics and diffusion of sodium ions,conferring many benefits to the functionality of conversion-type electrode materials.As a representative material,Ni-CoSe_(2) with such structural engineering shows a reversible capacity of 515 mAh g^(−1)at 0.1 A g^(−1)and a stable capacity of 416 mAh g^(−1)even at 6.4 A g^(−1);more than 80%of the capacity at 0.1 A g^(−1)could be preserved,so that this strategy holds great promise for designing fast-charging conversion-type anodes in the future.

关键词： bimetal selenides fast charging hybridized shell sodium-ion batteries structure engineering

Structural engineering of transition metal-based nanostructured electrocatalysts for efficient water splitting

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Frontiers of Chemical Science and engineering 2018年第4期12卷 838-854页

作者： Yueqing Wang Jintao Zhang Key Laboratory for Colloid and Interface Chemistry (Ministry of Education) School of Chemistry and Chemical EngineeringShandong University Jinan 250100China

Water splitting is a highly promising approach for the generation of sustainable, clean hydrogen energy. Tremendous efforts have been devoted to exploring highly efficient and abundant metal oxide electrocatalysts for oxygen evolution and hydrogen evolution reactions to lower the energy consumption in water splitting. In this review, we summarize the recent advances on the development of metal oxide electrocatalysts with special emphasis on the structural engineering of nanostructures from particle size, composition, crystalline facet, hybrid structure as well as the conductive supports. The special strategies relay on the transformation from the metal organic framework and ion exchange reactions for the preparation of novel metal oxide nanostructures with boosting the catalytic activities are also discussed. The fascinating methods would pave the way for rational design of advanced electrocatalysts for efficient water splitting.

关键词： water splitting structure engineering metal organic framework ion exchange synergistic effect hybrid structure conductive supports

Magnesium-based energy materials: Progress, challenges, and perspectives

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Journal of Magnesium and Alloys 2023年第11期11卷 3896-3925页

作者： Guang Han Yangfan Lu Hongxing Jia Zhao Ding Liang Wu Yue Shi Guoyu Wang Qun Luo Yu'an Chen Jingfeng Wang Guangsheng Huang Xiaoyuan Zhou Qian Li Fusheng Pan National engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China College of Materials Science and engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China Chongqing Institute of New Energy Storage Materials and Equipment Chongqing 401135China State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China College of Physics Chongqing UniversityChongqing 401331China

Magnesium-based energy materials, which combine promising energy-related functional properties with low cost, environmental compatibility and high availability, have been regarded as fascinating candidates for sustainable energy conversion and storage. In this review,we provide a timely summary on the recent progress in three types of important Mg-based energy materials, based on the fundamental strategies of composition and structure engineering. With regard to Mg-based materials for batteries, we systematically review and analyze different material systems, structure regulation strategies as well as the relevant performance in Mg-ion batteries(MIBs) and Mg-air batteries(MABs), covering cathodes, electrolytes, anodes for MIBs, and anodes for MABs;as to Mg-based hydrogen storage materials, we discuss how catalyst adding, composite, alloying and nanostructuring improve the kinetic and thermodynamic properties of de/hydrogenation reactions, and in particular, the impacts of composition and structure modification on hydrogen absorption/dissociation processes and free energy modification mechanism are focused;regarding Mg-based thermoelectric materials, the relations between composition/structure and electrical/thermal transport properties of Mg_(3)X_(2)(X = Sb, Bi), Mg_(2)X(X = Si, Ge, Sn) and Mg Ag Sb-based materials, together with the representative research progress of each material system, are summarized and discussed. Finally, by pointing out remaining challenges and providing possible solutions, this review aims to shed light on the directions and perspectives for practical applications of magnesium-based energy materials in the future.

关键词： Mg-based battery materials Mg-based hydrogen storage materials Mg-based thermoelectric materials Composition regulation structure engineering

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Tailoring the Meso-structure of Gold Nanoparticles in Keratin-Based Activated Carbon Toward High-Performance Flexible Sensor

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Nano-Micro Letters 2020年第9期12卷 136-146页

作者： Aniruddha BPatil Zhaohui Meng Ronghui Wu Liyun Ma Zijie Xu Chenyang Shi Wu Qiu Qiang Liu Yifan Zhang Youhui Lin Naibo Lin Xiang Yang Liu Research Institute for Soft Matter and Biomimetics Fujian Provincial Key Laboratory for Soft Functional Materials ResearchDepartment of PhysicsCollege of MaterialsXiamen UniversityXiamen 361005People’s Republic of China Department of Chemistry M.D.CollegeParelMumbai 400012India Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore

Flexible biosensors with high accuracy and reliable operation in detecting pH and uric acid levels in body fluids are fabricated using well-engineered metaldoped porous carbon as electrode material.The gold nanoparticles@N-doped carbon in situ are prepared using wool keratin as both a novel carbon precursor and a stabilizer.The conducting electrode material is fabricated at 500℃ under customized parameters,which mimics A-B type(two different repeating units) polymeric material and displays excellent deprotonation performance(pH sensitivity).The obtained pH sensor exhibits high pH sensitivity of 57 mV/pH unit and insignificant relative standard deviation of 0.088%.Conversely,the composite carbon material with sp^2 structure prepared at 700℃ is doped with nitrogen and gold nanoparticles,which exhibits good conductivity and electrocatalytic activity for uric acid oxidation.The uric acid sensor has linear response over a range of 1-150 μM and a limit of detection 0.1 μM.These results will provide new avenues where biological material will be the best start,which can be useful to target contradictory applications through molecular engineering at mesoscale.

关键词： Wool keratin structure engineering Metal nanoparticle carbon composite Health monitoring Flexible biosensor

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Application of experimental design techniques to structural simulation meta-model building using neural network

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Earthquake engineering and engineering Vibration 2004年第2期3卷 293-298页

作者：费庆国张令弥 Institute of Vibration engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Ph.D.Candidate Institute of Vibration engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Professor

Neural networks are being used to construct meta-models in numerical simulation of structures.In addition to network structures and training algorithms,training samples also greatly affect the accuracy of neural network models.In this paper,some existing main sampling techniques are evaluated,including techniques based on experimental design theory, random selection,and rotating sampling.First,advantages and disadvantages of each technique are reviewed.Then,seven techniques are used to generate samples for training radial neural networks models for two benchmarks:an antenna model and an aircraft model.Results show that the uniform design,in which the number of samples and mean square error network models are considered,is the best sampling technique for neural network based meta-model building.

关键词： structure engineering meta-model neural network design of experiments uniform design

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Experimental Analysis of Shear Repair for Reinforced Concrete Beams with Prestressed GFRP Plate Bonding

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Experimental Analysis of Shear Repair for Reinforced Concret...