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Triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide nanowires enable high-loading and long-lasting liquid Li_(2)S_(6)-based lithium-sulfur batteries

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Journal of Energy Chemistry 2021年第8期30卷 599-607,I0013页

作者： Chenyang Zha Donghai Wu Xiuquan Gu Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816China Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China School of Materials and Physics China University of Mining and TechnologyXuzhou 221116JiangsuChina Department of Chemical and Biological Engineering State University of New York at Buffalo14260-4200 BuffaloUSA

High performance of lithium-sulfur batteries have been dragged down by their shuttling behavior which is complicated multiphase transition-based 16-electron redox reactions of the S8/Li2 S.In this article,the triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide(C-Sb_(2)S_(3))nanowires are tailored to design a multifunctional polysulfide host which can inhibit migration of polysulfides and accelerate conversion kinetics of redox electrochemical reactions.Benefiting from the triple-interface design of polysulfides/Sb_(2)S_(3)/carbon clusters,the C-Sb_(2)S_(3) electrode not only anchors polysulfide migration by the synergistic effect of Sb,S,and C atoms as interfacial active sites,but also the graphene-like carbon clusters shorten the diffusion paths to further favor redox electron/ion transport through the liquid(electrolyte/polysulfide)and solid(Li2 S/S8,carbon clusters,and Sb_(2)S_(3))-based triple-phases.Therefore,these Li_(2)S_(6)-based C-Sb_(2)S_(3) cells possess high sulfur loading,excellent cycling stability,impressive specific capacity,and great rate capability.This work of interfacial engineering reveals insight for powering reaction kinetics in the complicated multistep catalysis reaction with multiphase evolution-based chargetransfer/non-transfer processes.

关键词： Triple-phase interfaces Graphene-like carbon Antimony trisulfide High preformance Lithium-sulfur batteries

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Efficient charge separation in hierarchical NiS@ZnIn_(2)S_(4) hollow nanospheres for photocatalytic water splitting

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Chinese Chemical Letters 2022年第2期33卷 926-929页

作者： Kai Wu Liang Mao Xiuquan Gu Xiaoyan Cai Yulong Zhao School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipment China University of Mining and TechnologyXuzhou 221116China

In this work,hierarchical Ni S@Zn In_(2)S_(4) heterostructure was developed by constructing ultra-thin Zn In;S;(ZIS) nanosheets on hollow Ni S nanospheres for hydrogen production from photocatalytic water splitting.The Ni S@ZIS displayed a strong optical absorption ability in the visible region and a high specific surface area of 33.14 m^(2)/g.The Type-I band alignment in Ni S@ZIS heterostructure was determined by the combination of UV–vis absorption spectroscopy and Mott-Schottky curves.The photocatalytic hydrogen production of Ni S@ZIS (1.24 mmol g;h;) was nearly 5.6 times higher than that of ZIS under visible light,in the absence of any co-catalyst and sacrificial agent.The separation and migration of charge in Ni S@ZIS were characterized by a series of spectroscopy and photo/electrochemical tests,which verified the efficient charge transfer from ZIS to Ni S.

关键词： Hollow sphere Heterostructure Photocatalyst Charge separation Hydrogen production

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Au modified BiVO_(4) microparticles for photocatalytic N_(2) fixation

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Optoelectronics Letters 2022年第1期18卷 24-28页

作者： SUI Meirong gu xiuquan School of Medical Imaging Xuzhou Medical UniversityXuzhou 221004China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China

In this work,a visible light photocatalyst based on Au modified BiVO_(4)microspheres was synthesized successfully through using a facile photodeposition method for visible light N_(2)fixation.Compared with pure BiVO_(4)microparticles(MPs),the obtained Au/BiVO_(4)MPs show superior N_(2)photofixation performance to BiVO_(4),owing to the enhancements of both the visible light absorption and charge carrier separation.After optimization,the actual NH_(4)^(+)generation rate of Au/BiVO_(4)reaches 0.419 mg·L^(-1),which is approximately 2 times higher than that of the pure BiVO_(4)one.The results presented herein provide new insights into rational design of highly active catalysts with Au NPs toward efficient,stable,and sustainable visible light N_(2)fixation in mild conditions.

关键词： visible pure modified

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Review on one-dimensional ZnO nanostructures for electron field emitters

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Frontiers of Optoelectronics 2013年第4期6卷 386-412页

作者： Meirong SUI Ping GONG Xiuquan Gu School of Medical Image Xuzhou Medical College Xuzhou 221004 China School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221116 China

The emission of electrons from the surface of a solid caused by a high electric field is called field emission （FE）. Electron sources based on FE are used today in a wide range of applications, such as microwave traveling wave tubes, e-beam evaporators, mass spectrometers, flat panel of field emission displays （FEDs）, and highly efficient lamps. Since the discovery of carbon nanombes （CNTs） in 1991, much attention has been paid to explore the usage of these ideal one-dimensional （ID） nanomater- ials as field emitters achieving high FE current density at a low electric field because of their high aspect ratio and ＂whisker-like＂ shape for optimum geometrical field enhancement. 1D metal oxide semiconductors, such as ZnO and WO3 possess high melting point and chemical stability, thereby allowing a higher oxygen partial pressure and poorer vacuum in FE applications. In addition, unlike CNTs, in which both semiconductor and metallic CNTs can co-exist in the as-synthesized products, it is possible to prepare 1D semiconductor nanostructures with a unique electronic property. Moreover, I D semiconductor nanos- tructures generally have the advantage of a lower surface potential barrier than that of CNTs due to lower electron affinity and the conductivity could be enhanced by doping with certain elements. As a consequence, there has been increasing interest in the investigation of 1D metal oxide nanostructure as an appropriate alternative FE electron source to CNT for FE devices in the past few years. This paper provides a comprehensive review of the state-of-the- art research activities in the field. It mainly focuses on FE properties and applications of the most widely studied 1D ZnO nanostructures, such as nanowires （NWs）, nanobelts, nanoneedles and nanotubes （NTs）. We begin with the growth mechanism, and then systematically discuss the recent progresses on several kinds of important nano- structures and their FE characteristics and applications in details. Finally, it is concluded with the outlook and future research te

关键词： field emission （FE） nanostructure metaloxide

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Acoustics Based Monitoring and Diagnostics for the Progressive Deterioration of Helical Gearboxes

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Chinese Journal of Mechanical Engineering 2021年第4期34卷 98-109页

作者： Kaibo Lu James Xi gu Hongwei Fan xiuquan Sun Bing Li Fengshou gu College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Engineering University of BoltonBolton BL35ABUK College of Mechanical Engineering Xi’an University of Science and TechnologyXi’an 710054China Centre for Efficiency and Performance Engineering University of HuddersfieldHuddersfield HD13DHUK. School of Industrial Automation Beijing Institute of TechnologyZhuhai 519088China

Gearbox condition monitoring(CM)plays a significant role in ensuring the operational reliability and efficiency of a wide range of critical industrial systems such as wind turbines and helicopters.Accurate and timely diagnosis of gear faults will improve the maintenance of gearboxes operating under sub-optimal conditions,avoid excessive energy consumption and prevent avoidable damages to systems.This study focuses on developing CM for a multi-stage helical gearbox using airborne sound.Based on signal phase alignments,Modulation Signal Bispectrum(MSB)analysis allows random noise and interrupting events in sound signals to be suppressed greatly and obtains nonlinear modulation features in association with gear dynamics.MSB coherence is evaluated for selecting the reliable bi-spectral peaks for indication of gear deterioration.A run-to-failure test of two industrial gearboxes was tested under various loading conditions.Two omnidirectional microphones were fixed near the gearboxes to sense acoustic information during operation.It has been shown that compared against vibration based CM,acoustics can perceive the responses of vibration in a larger areas and contains more comprehensive and stable information related to gear dynamics variation due to wear.Also,the MSB magnitude peaks at the first three harmonic components of gear mesh and rotation components are demonstrated to be sufficient in characterizing the gradual deterioration of gear transmission.Consequently,the combining of MSB peaks with baseline normalization yields more accurate monitoring trends and diagnostics,allowing the gradual deterioration process and gear wear location to be represented more consistently.

关键词： Acoustics Modulation Signal Bispectrum Helical gearbox Gear wear

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Cs^(+)掺杂MAPbI_(3)薄膜的能级调控及其光电性能

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微纳电子技术 2021年第10期58卷 895-902,919页

作者：朱磊顾修全中国矿业大学现代分析与计算中心中国矿业大学材料与物理学院江苏徐州221116

相比于MAPbI_(3)、FAPbI_(3)等纯有机阳离子钙钛矿太阳电池(PSC),有机无机混合阳离子PSC因同时具有良好的光电性能和稳定性而广受关注。通过形貌控制和能级调节策略来优化MAPbI_(3)薄膜质量并将其作为PSC光活性层。采用溶剂法将Cs+掺杂... 详细信息

相比于MAPbI_(3)、FAPbI_(3)等纯有机阳离子钙钛矿太阳电池(PSC),有机无机混合阳离子PSC因同时具有良好的光电性能和稳定性而广受关注。通过形貌控制和能级调节策略来优化MAPbI_(3)薄膜质量并将其作为PSC光活性层。采用溶剂法将Cs+掺杂到MAPbI_(3)前驱体溶液中合成CsxMA1-xPbI_(3)(x为0~20%)有机无机混合阳离子钙钛矿型光活性材料。由于制备的Cs_(0.1)MA_(0.9)PbI_(3)光活性薄膜具有表面形貌致密、容忍因子适当、能级结构匹配等特点,以此制备的PSC的能量转换效率最高为14.38%(标准差±1.21%),且电池具有良好的稳定性,在空气中放置30天电池能量转换效率衰减<12%。

关键词：钙钛矿太阳电池(PSC) Cs+掺杂能级调节光电性能光活性薄膜

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Fabrication and photoluminescence of Er-doped ZnO thin films on SiO_2/Si substrate by pulsed laser deposition

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Rare Metals 2006年第z2期25卷 30-35页

作者： gu xiuquan ZHU Liping YE Zhizhen HE Haiping ZHAO Binghui State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China

Er doped ZnO thin films were grown on Si substrates using SiO2 buffer layer by pulsed laser deposition (PLD) method. The obtained films crystallize well and show high c-axis orientation. The Er content was evidently detected by the energy dispersive X-ray spectroscopy (EDS). Upon annealing in O2 ambience at different temperatures, the films show different photoluminescence properties at 1.54 μm. The samples annealed at 700 and 850 ℃ show intense photoluminescence peaks which enhance with the annealing temperature, while no obvious luminescence peaks are observed for the as-grown samples or annealed at 500 ℃. The possible mechanism was discussed.

关键词： Er3+ ions ZnO near-infrared photoemission optical communication

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基于Sb2S3阳极的钠离子电池性能评价综合实验设计

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实验室研究与探索 2019年第11期38卷 197-199,265页

作者：顾修全家珊中国矿业大学材料科学与工程学院

该实验选用SbCl3作为锑源,硫脲作为硫源,制备出了长度为2~5μm棒状堆积的Sb2S3阳极材料.Sb2S3用作钠离子电池的阳极材料,通过SEM、TEM、循环伏安(CV)和恒流充放电等测试手段,表征了Sb2S3阳极材料的形貌特征以及Sb2S3在钠离子电池中的电... 详细信息

该实验选用SbCl3作为锑源,硫脲作为硫源,制备出了长度为2~5μm棒状堆积的Sb2S3阳极材料.Sb2S3用作钠离子电池的阳极材料,通过SEM、TEM、循环伏安(CV)和恒流充放电等测试手段,表征了Sb2S3阳极材料的形貌特征以及Sb2S3在钠离子电池中的电化学性能.研究了Sb2S3在钠离子电池中的性能及作用.结果表明:电池的初始库伦效率为67.19%,200次循环后稳定在290 mAh/g左右,这与循环时电池内部结构的体积膨胀变化有关.在该实验中,Sb2S3是采用水热法制备而成的,具有操作简易、易于分组协作探究等优点,可作为电化学等专业课的综合性实验,使学生充分了解掌握Sb2S3的合成工艺以及常用的分析手段,从而培养学生应用综合知识的能力和科研能力.

关键词： Sb2S3 钠离子电池水热法性能评价

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TiO2纳米棒阵列的可控合成及其光电性能

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微纳电子技术 2018年第1期55卷 51-56页

作者：赵宇龙顾修全中国矿业大学化工学院江苏徐州221116 中国矿业大学材料科学与工程学院江苏徐州221116

采用简单的水热路线合成出TiO2纳米棒阵列,作为染料敏化太阳电池（DSSC）光阳极,并对其形貌、结构和光电特性进行表征。探讨了前驱体溶液总量、Ti源加入量等对产物形貌以及DSSC性能的影响。研究结果表明：增加前驱体溶液中Ti源的加入量... 详细信息

采用简单的水热路线合成出TiO2纳米棒阵列,作为染料敏化太阳电池（DSSC）光阳极,并对其形貌、结构和光电特性进行表征。探讨了前驱体溶液总量、Ti源加入量等对产物形貌以及DSSC性能的影响。研究结果表明：增加前驱体溶液中Ti源的加入量将使纳米棒长度和直径同时增加,最终导致形成＂蒲公英＂状产物,DSSC性能有所提高,同时暗电流也会随之增大;增加前驱体溶液总量也会使纳米棒更长、更密,但DSSC性能提高幅度不大,暗态电流密度-电压（J-V）曲线几乎没有变化。研究将有助于人们更清楚地认识TiO2纳米棒阵列的生长动力学机制,进而优化纳米棒阵列光电器件的性能。

关键词：二氧化钛纳米棒阵列染料敏化太阳电池水热法

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Ag_3PO_4/Co_3O_4异质结光催化剂的制备及其光催化性能研究

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实验技术与管理 2018年第8期35卷 38-41,68页

作者：顾修全何容中国矿业大学材料科学与工程学院江苏徐州221116

采用简单沉淀法制备Ag_3PO_4、Ag_3PO_4/Co_3O_4异质结光催化剂,并研究两者的比例对异质结型光催化剂性能的影响。研究发现:加入Co_3O_4不会显著增强Ag_3PO_4的光催化活性;只有当Co_3O_4与Ag_3PO_4的摩尔比为1∶5时,其光催化性能最佳。... 详细信息

采用简单沉淀法制备Ag_3PO_4、Ag_3PO_4/Co_3O_4异质结光催化剂,并研究两者的比例对异质结型光催化剂性能的影响。研究发现:加入Co_3O_4不会显著增强Ag_3PO_4的光催化活性;只有当Co_3O_4与Ag_3PO_4的摩尔比为1∶5时,其光催化性能最佳。此外,活性基团实验也表明:空穴在罗丹明B的光降解过程中发挥主要作用。

关键词：异质结光催化剂 Co3O4 Ag3O4 罗丹明B

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