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Extended Phase Homogeneity and Improved Out-of-Plane Charge Transfer in Sb and Te Co-Alloyed N-Type Bise Layered Compound with Extraordinary Thermoelectric Performance

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SSRN 2023年

作者： Yang, Xinru Xie, Chenghao Sun, Jinchang Xu, Weibin Li, Songlin Tang, Xinfeng Tan, Gangjian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

BiSe is a promising n-type layered thermoelectric compound near room temperature. However, its full potential is not realized because of its overall high electron density and inferior interlayer charge transport. In this study, we demonstrate that these drawbacks are well addressed by a feasible Sb and Te co-alloying approach. Sb, preferably substituting Bi atoms in the Bi2Se3 quintuplet layer, effectively neutralizing excess electrons of BiSe by suppressing positively charged Se vacancies. On the other hand, Te exclusively replaces Se, and promotes interlayer charge transfer by increasing chemical bond covalency. In addition, Te alloying significantly impedes phonon propagation of BiSe by introducing considerable size and mass disorders. More importantly, it is found that co-alloying expands the phase homogeneity of BiSe, which further intensifies the respective functions of Sb and Te alloying. As a consequence, a peak ZT value of 0.6 at 425 K is realized in the sample Bi0.6Sb0.4Se0.6Te0.4, which is 2.5 times that of pristine BiSe. Our work suggests that Sb and Te co-alloyed BiSe is a robust candidate for thermoelectric application near room temperature. © 2023, The Authors. All rights reserved.

关键词： Charge transfer

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A thermo-responsive rewritable plasmonic bio-memory by regulating single core-satellite gold nanocluster dissociation

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Nano Research 2024年第8期17卷 7275-7282页

作者： Wen Zhang Yi Wang Yamin Wang Xiaomei Lu Weibing Wu Quli Fan Lei Zhang State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China Zhengzhou Institute of Biomedical Engineering and Technology Zhengzhou 450001China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)&School of Flexible Electronics(Future Technologies)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

A thermo-responsive rewritable plasmonic bio-memory chip has been successfully fabricated on an indium tin oxide(ITO)glass slide by assembling core-satellite gold nanoclusters with different size of gold nanoparticles(AuNPs)using double-strand DNA(dsDNA)*** the prepared 70@DNA20@13 gold nanoclusters(AuNCs)exhibited more stable and greater photothermal conversion *** short time irradiation by 633 nm microbeam laser,every individual AuNCs could be excited and remove the satellite AuNPs on its ***,in the dissociation process of AuNCs with 3−5 satellite,its color would change from yellow to green,which showed more significant reduction in the red channel of the dark-field microscopy(DFM)images and could be defined to state“0”and“1”***,this plasmonic nano bio-memory could transform cyclically its state between 0 and 1 which exhibited excellent rewritable ability.

关键词： plasmonic assembly thermal-responsive single nanoparticle rewritable bio-memory

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Composition, Structure and Electrochemical Performance of Lisipscl Electrolyte with Li/Li-In Anodes in All-Solid-state Batteries

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SSRN 2023年

作者： Zhang, Ji-Wei Wang, Wen-Hao Xie, Meng-Xiang Wu, Hou-Ran Wang, Yan-Pei Bao, Hao-Tian Cao, Bo-Qun Shao, Gang-Qin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei430070 China

The lithium silicon phosphor sulfo-chloride (LiSiPSCl) with a Li10GeP2S12-type structure is one of the most promising solid electrolytes (SEs) for all-solid-state lithium-ion batteries (ASSLIBs) due to its currently highest ionic conductivity at RT. In this work, three kinds of LiSiPSCl electrolytes, i.e. Li7.59(10)Si1.95(9)P1.65(7)S11.64(1)Cl0.36(1) (SE-450), Li7.67(12)Si1.90(1)P1.67(1)S11.61(2)Cl0.39(2) (SE-475) and Li7.58(5)Si1.75(4)P1.79(2)S11.54(4)Cl0.46(4) (SE-500), were prepared at 450 / 475 / 500 oC for 8 h through a solid-state method. The assembling of blocking / symmetrical / semi-blocking cells and ASSLIBs, and electrochemical measurements were carried out by coupling the three SEs with two kinds of anodes (Li metal and Li-In alloy) and one cathode of LiNbO3-coated LiNi0.8Co0.1Mn0.1O2 (NCM@LNO). Studies were focused on chemical compositions, phase compositions, structure refinements, electrolyte/anode and electrolyte/cathode interfacial stability. Results show that LiSiPSCl electrolytes had favorable interfacial stability with Li-In anode and exhibited low polarization voltage ( © 2023, The Authors. All rights reserved.

关键词： Sulfur compounds

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引入共价型氮化钒来提高氮掺杂碳的亲电性以促进氧还原反应

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Science China materials 2023年第1期66卷 160-168页

作者：李士栋庄泽超夏力学朱杰鑫刘子昂贺汝涵罗雯黄文忠石长玮赵焱周亮 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China

氮掺杂碳(NC)是一种有潜力的氧还原反应(ORR)电催化剂.氮掺杂碳可直接作为ORR活性位点中心,优化氮原子的电子结构对催化活性具有很大影响.本文通过简单的物理混合和煅烧处理,构建了一种由氮化钒(VN)纳米颗粒为核、“铠甲状”NC作为壳的... 详细信息

氮掺杂碳(NC)是一种有潜力的氧还原反应(ORR)电催化剂.氮掺杂碳可直接作为ORR活性位点中心,优化氮原子的电子结构对催化活性具有很大影响.本文通过简单的物理混合和煅烧处理,构建了一种由氮化钒(VN)纳米颗粒为核、“铠甲状”NC作为壳的新型VN@NC纳米复合材料.得益于纳米线独特的核@壳结构和优化的电子结构,与纯NC和体相VN相比,所制备的VN@NC展现出更优异的ORR活性(起始电位:0.93 V).VN的引入诱导了电荷从NC上的氮原子转移到VN上的钒原子,增加了NC上氮原子的亲电性,从而优化了对含氧中间体的吸附过程.VN@NC也展现出了良好的循环稳定性(四万秒测试后,电流密度保持率为89%).本研究揭示了调节NC中氮原子电子结构的重要性,并为构建NC基复合型电催化剂提供了有效方法.

关键词：亲电性氧还原反应电催化剂氮化钒物理混合氮掺杂碳壳结构循环稳定性

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A Luminescent Metal-Organic Framework with LON Topology for Highly Effective Fluorescence Sensing of Fe^(3+) and TNP

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Chemical Research in Chinese Universities 2023年第2期39卷 305-309页

作者： GU Yu LIN Rui LUO Xiaolong LIU Yunling Advanced Institute of Materials Science School of Chemistry and Life ScienceChangchun University of TechnologyChangchun130012P.R.China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry Jilin UniversityChangchun130012P.R.China

A luminescent Ag-based metal-organic framework(compound 1)has been synthesized and its structure has been *** 1 was fabricated using the Ag+and bbimb2−ligands and manifestes a rare LON *** 1 is selective not only in detecting traces of Fe^(3+)and 2,4,6-trinitrophenol(TNP)via luminescence quenching,but also demonstrates high selectivity in the presence of other *** 1’s K sv values towards Fe^(3+)can reach as high as 9.3×l0^(3) L/mol,which is higher than those of several other MOF *** is also a recyclable luminous sensor with the potential to be utilized for detecting ***,based on its characteristics,compound 1 can be regarded as a prospective luminescence sensor for detecting Fe^(3+)and TNP.

关键词： Metal-organic framework Fluorescence quenching Fe^(3+) 2,4,6-Trinitrophenol(TNP)

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Smart ZnS@C filler for super-anticorrosive self-healing zinc-rich epoxy coating

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Nano Research 2022年第5期15卷 4756-4764页

作者： Kai Yang Yixue Duan Guicheng Liu Guoyan Ma Hao Fu Xuyong Chen Manxiang Wang Gangqiang Zhu Woochul Yang Yiding Shen Shaanxi Key Laboratory of Chemical Additives for Industry Shaanxi University of Science and TechnologyXi’an 710021China Department of Physics Dongguk UniversitySeoul 04620Republic of Korea State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China College of Chemistry and Chemical Engineering Xi'an Shiyou UniversityXi'an 710065China School of physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

The zinc-rich epoxy cathodic protection coating is the most widely used anticorrosion material for marine ***,traditional conductive fillers lack the intelligent self-healing effect,which limits the long-term anticorrosion ***,with uniform carbon-coated ZnS(ZnS@C)nanoballs as the smart active release filler,we propose an anticorrosive and self-healing zinc-rich maleic anhydride epoxy *** to the high pore filling efficiency of the nanoballs,the water vapor transmission rate of the coating with an initial corrosion efficiency of 99.92%and a low-frequency impedance of|Z|f=10mHz=3.88×10^(10) Ω·cm^(2),was reduced by 52%.The carbon-shell of the nanoball increases electron transmission paths in the coating and improves conductivity by nearly two orders of magnitude,which effectively activates more Zn-sites and extends the cathodic protection ***,once the steel-substrate undergoes regional corrosion,the SO_(4)^(2-)hydrolyzes from the ZnS-core of the nanoball and reacts with iron ions on the corroded area accurately and intelligently to fill the gap and self-heals into a new dense barrier layer(Fe_(2)(SO_(4))_(3),etc.),which significantly improves the shielding protection ability during the long-term usage of the *** effective anticorrosion time of the proposed coating could be up to 3,400 h.

关键词： smart ZnS@C fller microemulsion-carbonization method zinc-rich epoxy coating anticorrosion self-healing

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Layer-by-layer fabrication of montmorillonite coating immobilizing Cu_(2)O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

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Chinese Journal of Chemical Engineering 2024年第4期68卷 263-275页

作者： Kejin Li Jiahui Liu Dajian Li Xiaolan Chen Chunhui Zhou Research Group for Advanced Materials&Sustainable Catalysis(AMSC) State Key Laboratory Breeding Base of Green Chemistry-Synthesis TechnologyCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310032China Qing Yang Institute for Industrial Minerals Qingyang 242804China Engineering Research Center of Non-metallic Minerals of Zhejiang Province Zhejiang Institute of Geology and Mineral ResourcesHangzhou 310007China

Microreactors are increasingly used for green and safe chemical processes owing to their benefits of superior mass and heat transfer,increased yield,safety,and simplicity of ***,immobilizing catalysts in microreactors remains *** this investigation,a technique for creating Cu_(2)O/montmorillonite catalyst coating,using electrostatic attraction for layer-by-layer self-assembly,was *** montmorillonite film's morphology and thickness could be efficiently regulated by adjusting the degree of exfoliation and surface charge of montmorillonite,alongside layer-by-layer coating *** Cu_(2)O nanoparticles were immobilized using the flow deposition *** resulting Cu_(2)O@montmorillonite-film-coated capillary microreactor successfully transformed glycerol into *** conversion of glycerol and product selectivity could be controlled by adjusting the molar ratio of reactants,temperature,residence time,and Cu_(2)O *** maximum glycerol conversion observed was 47.6%,with a 27%selectivity toward *** study presents a technique for immobilizing montmorillonite-based catalyst coatings in capillary tubing,which can serve as a foundation for the future application of microreactors in glycerol conversion.

关键词： Microreactor Coating Montmorillonite Glycerol Cu_(2)O

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In situ STEM Observation of Cation Diffusion and Surface Reconstruction at van der Waals Gaps

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Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1642-1643页

作者： Cui, Wenjun Lin, Weixiao Lu, Weichao Liu, Chengshan Gao, Zhixiao Ma, Hao Zhao, Wen Van Tendeloo, Gustaaf Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Nanostructure Research Center Wuhan University of Technology Wuhan China School of Materials Science and Engineering China University of Petroleum (East China) Qingdao Shandong China Electron Microscopy for Materials Science (EMAT) University of Antwerp Antwerp Belgium

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Anion-templated Self-assembly for the Preparation of Silver-t-butylthiolate Clusters

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Chinese Journal of Structural Chemistry 2022年第3期41卷 100-107,I0010页

作者： JIN Jun-Ling SHEN Yang-Lin MI Li-Wei XIE Yun-Peng LU Xing Henan Key Laboratory of Functional Salt Materials Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007China College of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of EngineeringZhengzhou 451191China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Silver thiolate polymers are intercepted to form different structural fragments when reacting with variant solubilizing reagents,which usually serve as the starting point for the preparation of ***,such a process is still far from ***,we report the controlled synthesis of silver-t-butylthiolate clusters from reactions of polymeric[Ag^(t)BuS]n and suitable templates in the presence of solubilizing reagents to offer a detailed look at the mechanism of cluster’s *** the provided solubilizing reagents have weak coordina-tion ability,such as O-or N-donating ligands,the obtained polymeric compound retains the linear structure pat-tern that S and Ag atoms are arranged *** extra templates NO_(3)^(−)and CO_(3)^(2−)are applied,the disk-like clusters Ag_(19)and Ag_(20)are constructed with the same[Ag^(t)BuS]_(5)circles that may directly cyclize from the linear[Ag^(t)BuS]_(n)*** contrast,(EtO)_(2)PS_(2)^(−)and(iPrO)_(2)PS_(2)^(−)anions have large size and strong coordination abil-ity rendering the structure of the polymer completely *** extremely short[Ag^(t)BuS]n pieces with silver ions and solubilizing ligands assemble around the templates V_(2)O_(7)^(4−)and W_(2)O_(9)^(4−),leading to the formation of clusters Ag_(22)and Ag_(24).

关键词： silver cluster X-ray crystal structure silver thiolate polymer self-assembly

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Effects of heat treatments on microstructures of TiAl alloys

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International Journal of Minerals,Metallurgy and materials 2022年第6期29卷 1225-1230页

作者： Wen Yu Jianxin Zhou Yajun Yin Zhixin Tu Xin Feng Hai Nan Junpin Lin Xianfei Ding State Key Laboratory of Materials Processing and Die and Mould Technology Huazhong University of Science and TechnologyWuhan 430074China Cast Titanium Alloy R&D Center Beijing Institute of Aeronautical MaterialsBeijing 100095China Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology Beijing 100095China Beijing Institute of Aeronautical Materials Co. Ltd.Beijing 100094China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This study aims to investigate the effects of heat treatments on the microstructure ofγ-TiAl *** Ti-47Al-2Cr-2Nb alloy ingots were manufactured by casting method and then heat-treated in two types of heat *** microstructures were studied by both optical and scanning electron *** chemical compositions of two ingots were determined as *** ingot with lower Al content only obtains lamellar structures while the one higher in Al content obtains nearly lamellar and duplex structures after heat treatment within1270 to 1185℃.A small amount of B2 phase is found to be precipitated in both as-cast and heat-treated *** are distributed at grain boundaries when holding at a higher temperature,such as 1260℃.However,B2 phase is precipitated at grain boundaries and in colony interiors simultaneously after heat treatments happened at 1185℃.Furthermore,the effects of heat treatments on grain refinement and other microstructural parameters are discussed.

关键词： TiAl alloys microstructure heat treatment casting

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