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Chalcogenide-based S-scheme heterojunction photocatalysts

Chinese Journal of Catalysis 2024年第8期63卷 81-108页

作者： chunguang Chen Jinfeng Zhang hailiang chu Lixian Sun Graham Dawson Kai Dai Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004GuangxiChina Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of EducationCollege of Physics and Electronic InformationHuaibei Normal UniversityHuaibei 235000AnhuiChina Department of Chemistry Xi’an Jiaotong Liverpool UniversitySuzhou 215123JiangsuChina

The unique photocatalytic mechanism of S-scheme heterojunction can be used to study new and efficient *** carefully selecting semiconductors for S-scheme heterojunction photo-catalysts,it is possible to reduce the rate of photogenerated carrier recombination and increase the conversion efficiency of light into *** are a group of compounds that include sulfides and selenides(e.g.,CdS,ZnS,Bi_(2)S_(3),MoS_(2),ZnSe,CdSe,and CuSe).Chalcogenides have at-tracted considerable attention as heterojunction photocatalysts owing to their narrow bandgap,wide light absorption range,and excellent photoreduction *** paper presents a thor-ough analysis of S-scheme heterojunction photocatalysts based on *** an introduction to the fundamental characteristics and benefits of S-scheme heterojunction photocata-lysts,various chalcogenide-based S-scheme heterojunction photocatalyst synthesis techniques are *** photocatalysts are used in numerous significant photocatalytic reactions,in-cluding the reduction of carbon dioxide,synthesis of hydrogen peroxide,conversion of organic matter,generation of hydrogen from water,nitrogen fixation,degradation of organic pollutants,and *** addition,cutting-edge characterization techniques,including in situ characterization techniques,are discussed to validate the steady and transient states of photocatalysts with an S-scheme ***,the design and challenges of chalcogenide-based S-scheme het-erojunction photocatalysts are explored and recommended in light of state-of-the-art research.

关键词： Photocatalysis Chalcogenide S-scheme heterojunction Charge separation Application

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Nb_(30)Ti_(35)Co_(35)合金定向凝固组织演化和显微硬度研究

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稀有金属 2024年第2期48卷 164-173页

作者：王豪闫二虎王金华褚海亮邹勇进孙立贤桂林电子科技大学材料科学与工程学院广西信息材料重点实验室广西桂林541004 中南大学粉末冶金国家重点实验室湖南长沙410083

三元以及多元合金凝固过程中,多组元间相互耦合和溶质再分配造成其凝固路径及其组织异常复杂,到目前为止尚未建立起完整统一的三元共晶凝固理论模型,凝固组织和机械性能的本质关系亟待研究。基于此,针对Nb_(30)Ti_(35)Co_(35)共晶合金(... 详细信息

三元以及多元合金凝固过程中,多组元间相互耦合和溶质再分配造成其凝固路径及其组织异常复杂,到目前为止尚未建立起完整统一的三元共晶凝固理论模型,凝固组织和机械性能的本质关系亟待研究。基于此,针对Nb_(30)Ti_(35)Co_(35)共晶合金(实测Nb_(31)Ti_(34)Co_(35))开展了不同抽拉速率(v=3,5,15,30,70μm·s^(-1))下的定向凝固实验研究,测量其显微硬度(H),旨在探索不同抽拉速率下合金的微观组织演化规律,并构建组织和性能之间的关系。结果表明:除极少量初生α-Nb外,常规铸态合金几乎完全由共晶(α-Nb+TiCo)组织构成,相类似地,定向凝固合金组织中也含有相同的组织类型(少量的Ti_(2)Co除外),即初生α-Nb和共晶(α-Nb+TiCo)组织;随着抽拉速率的逐渐增加,初生相α-Nb依次经历了“圆球状→团簇状→枝晶状”的转变,稳态生长区内共晶组织逐渐粗化,共晶排列不规则且相间距明显变大,淬火界面失稳并依次经历胞状界面到枝晶状界面转变;另外,与常规铸态合金相比较,定向凝固后合金的显微硬度明显提升并随着抽拉速率的减小而显著增加,二者关系为H=222.4+v^(-0.4328)+319.8,其中,抽拉速率为3μm·s^(-1)时的合金显微硬度值最大,为HV_(0.3)462,约为铸态合金的1.5倍。证实了定向凝固工艺可以调控合金显微组织,进而有效提高Nb-Ti-Co合金机械性能。

关键词： Nb-Ti-Co合金定向凝固微观组织显微硬度

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Encapsulation of hollow Cu_(2)O nanocubes with Co_(3)O_(4)on porous carbon for energy-storage devices

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Journal of Materials Science & Technology 2020年第20期52卷 182-189页

作者： Yongjin Zou Xi Zhang Jing Liang Cuili Xiang hailiang chu Huanzhi Zhang Fen Xu Lixian Sun Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004China

Co3 O4 is one of the most studied transition-metal oxides for use in energy-storage ***,its poor conductivity and stability limit its *** this study,a facile method for anchoring Co3 O4-encapsulated Cu2 O nanocubes on porous carbon(PC) to form Cu2 O@Co3 O4/PC was *** Cu2 O@Co3 O4/PC composite exhibited superior electrochemical performance as a supercapacitor electrode *** resultant supercapacitor delivered high specific capacitance(1096 F g^-1 at 1 A g^-1),high rate capability(83 % retention at 10 A g^-1),and excellent cycling stability(95 % retention of initial capacitance after 3000 cycles).Moreover,an asymmetric supercapacitor fabricated by coupling a Cu2 O@Co3 O4/PC positive electrode with a reduced graphene oxide negative electrode exhibited high energy density(32.1 W h kg^-1 at 700 W kg^-1).Thus,our results demonstrate that Cu2 O@Co3 O4/PC is a promising electrode material for energy-storage devices.

关键词： Cu_(2)O Co_(3)O_(4) Hollow nanocube Graphene Composite

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Spacing graphene and Ni-Co layered double hydroxides with polypyrrole for high-performance supercapacitors

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Journal of Materials Science & Technology 2020年第20期52卷 190-197页

作者： Jing Liang Cuili Xiang Yongjin Zou Xuebu Hu hailiang chu Shujun Qiu Fen Xu Lixian Sun Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004China Chongqing University of Technology College of Chemistry&Chemical EngineeringChongqing 400054China

The urgent need of high-performance of energy storage devices triggers us to design newly class of ***,the materials feature with high conductivity,abundant pore s and excellent ***,a sandwiched hybrid composite containing reduced graphene oxide,polypyrrole and Ni-Co layered double hydroxides(RGO/PPy/NiCo-LDH) was prepared in a facile *** polypyrrole was incorporated in the two dimensional(2D) nanosheets,which not only serve as the spacer to increase the surface area,but also enhance the conductivity of the *** obtained architecture was employed as an advanced electrode in a *** electrode shows an ultrahigh specific capacitance(2534 F g^-1 at 1 A g^-1) and good cycling efficiency(78 % after 5000 cycles).Moreover,an asymmetric cell based RGO/PPy/NiCo-LDH composite demonstrates excellent electrochemical properties and good prospect of practical use.

关键词： Graphene Ni-Co layered double hydroxides Polypyrrole Supercapacitor Porous carbon

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Improved hydrogen desorption properties of Co-doped Li_2 BNH_6

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Chinese Science Bulletin 2011年第23期56卷 2481-2485页

作者： ZHENG XueLi WU GuoTao HE Teng chu hailiang CHEN Hua CHEN Ping Key Lab of Green Chemistry and Technology Ministry of Education the Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

The hydrogen desorption properties of Li 2 BNH 6 were improved by doping with cobalt. With the addition of CoCl 2 (7 wt%), more than 8 wt% of hydrogen was released from Li 2 BNH 6 at temperatures below 210°C, which is approximately 90°C lower than that of pristine Li 2 BNH 6 . X-ray diffraction, Fourier transform-infrared and Raman characterizations revealed that the dehydrogenation was a stepwise process with the formation of intermediates Li 4 BN 3 H 10 and LiBH 4 and final products of Li 3 BN 2 and LiH. The introduction of Co greatly accelerated the dehydrogenation of Li 4 BN 3 H 10 . X-ray absorption near-edge structure measurements revealed that Co and CoB species formed during ball milling of CoCl 2 with LiBH 4 and LiNH 2 , which may function as catalyst in the subsequent dehydrogenation.

关键词：放氢 X射线吸收近边结构共掺属性脱附傅里叶变换性能改善射线衍射

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Binary Co–Ni oxide nanoparticle-loaded hierarchical graphitic porous carbon for high-performance supercapacitors

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Journal of Materials Science & Technology 2020年第2期37卷 135-142页

作者： Yin Liu Cuili Xiang hailiang chu Shujun Qiu Jennifer McLeod Zhe She Fen Xu Lixian Sun Yongjin Zou Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China Department of Chemistry Queen’s UniversityK7L 3N6Canada

Heteroatom doped graphitic porous carbon is highly desirable for electrochemical applications because of its excellent conductivity and high surface *** this study,highly uniform Co-Ni oxide nanoparticleloaded B,N-doped hierarchical graphitic porous carbon was prepared through a dual pyrolysis *** dispersed chitosan hydrogel was first used as a precursor to fabricate the porous carbon(GCS–C)at 700℃.Co and Ni oxide nanoparticles were further anchored on the porous carbon through chemical reduction and calcined at high *** structure of the porous carbon was optimized by the introduction of graphene to the chitosan *** graphitic degree of the porous carbon was significantly improved by the Co and Ni *** heteroatom B and N were found to be well doped in the *** features enable the composite to be an excellent candidate for supercapacitor *** composite demonstrates a high capacitance(1266.7 F g-1 at 1 A g-1)and excellent stability.

关键词： Graphitic carbon Graphene Metal oxides Supercapacitor Porous carbon

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Rambutan-like hierarchically porous carbon microsphere as electrodematerial for high-performance supercapacitors

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Carbon Energy 2021年第2期3卷 361-374页

作者： chunfeng Shao Shujun Qiu Guiming Wu Boyang Cui hailiang chu Yongjin Zou Cuili Xiang Fen Xu Lixian Sun Guangxi Key Laboratory of Information Materials School of Materials Science and EngineeringGuangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsGuilin University of Electronic TechnologyGuilinChina Key Laboratory of Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouChina

Used as high-performance electrodes,both structural and compositional alterations of carbon materials play very important roles in energy conversion/storage *** in supercapacitors,hierarchical pores and heteroatom doping in carbon materials are *** the rambutan-like hierarchically porous carbon microspheres(PCMs)have been constructed via a hydrothermal treatment,followed by carbonization/*** hierarchically porous microstructure is composed of three-dimensional porous carbon networks,which give rise to a large surface ***,N and O functional groups are introduced in the as-prepared samples,which could generate the extra *** from the interconnected hierarchical and open structure,PCM exhibits outstanding capacitive performance,for example,superior specific capacitance and rate capability(397 and 288 F g^(−1) at 0.5 and 20A g^(−1),respectively),as well as long cycling stability(about 95%capacitance retention after 10,000 cycles).These encouraging results may pave an efficient way to fabricate advanced supercapacitors in the future.

关键词： DTPA glucose hierarchically porous carbon rambutan-like microspheres supercapacitors

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Superior performance for lithium storage from an integrated composite anode consisting of SiO-based active material and current collector

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Frontiers of Materials Science 2020年第3期14卷 243-254页

作者： Junqiang Hua hailiang chu Ying Zhu Tingting Fang Shujun Qiu Yongjin Zou Cuili Xiang Kexiang Zhang Bin Li Huanzhi Zhang Fen Xu Lixian Sun Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Centre of Structure and Property for New Energy Materialsand School of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin541004China

Silicon-based material is considered to be one of the most promising anodes for the next-generation lithium-ion batteries(LIBs)due to its rich sources,nontoxicity,low cost and high theoretical specific ***,it cannot maintain a stable electrode structure during repeated charge/discharge cycles,and therefore long cycling life is difficult to be *** address this problem,herein a simple and efficient method is developed for the fabrication of an integrated composite anode consisting of SiO-based active material and current collector,which exhibits a core-shell structure with nitrogen-doped carbon coating on SiO/P *** binder and conductive agent,the volume expansion of SiO active material in the integrated composite anode is suppressed to prevent its *** a current density of 500 mA·g−1,this integrated composite anode exhibits a reversible specific capacity of 458 mA·h·g−1 after 200 ***,superior rate performance and cycling stability are also *** work illustrates a potential method for the fabrication of integrated composite anodes with superior electrochemical properties for high-performance LIBs.

关键词： lithium-ion battery silicon monoxide red phosphorus rate performance integrated composite anode

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Biomass Homogeneity Reinforced Carbon Aerogels Derived Functional Phase-Change Materials for Solar–Thermal Energy Conversion and Storage

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Energy & Environmental Materials 2023年第1期6卷 164-176页

作者： Qingfeng Zhang Tingfeng Xia Qihan Zhang Yucao Zhu Huanzhi Zhang Fen Xu Lixian Sun Xiaodong Wang Yongpeng Xia Xiangcheng Lin Hongliang Peng Pengru Huang Yongjin Zou hailiang chu Bin Li School of Material Science&Engineering Guilin University of Electronic TechnologyGuilin 541004China Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and property for new energy and materialsGuilin University of Electronic TechnologyGuilin 541004China School of Material Science&Engineering Beijing University of Chemical TechnologyBeijing 100029China

We deviseda functional form stable compositephase-change materials(PCMs)toachieve a three-dimensional(3D)interconnectedporous carbon aerogel structure for encapsulating polyethyleneglycol(PEG).Anovelhomogeneity reinforced carbonaerogel witha well-interconnected porous structure was constructed bycombining a flexible carbonresource from biomass guar gum with hard-brittle carbonfrom polyimide,to overcome severeshrinkage andpoor mechanical performance of traditionalcarbon *** aerogel-encapsulated PEG produced thenovel composite PCMswithgood structure stability andcomprehensive energy storage *** showed thatthecomposite PCMsdisplayed awell-defined 3Dinterconnected structure,and theirenergy storage capacities were 171.5 and169.5 J/g,which changed onlyslightlyafter 100 thermalcycles,andthe compositescould maintainthe equilibrium temperature at50.0−58.1℃ for about 760.3 *** thermal conductivityofthe compositescould reach0.62 W m^(−1) K^(−1),which effectively enhanced the thermalresponse *** thecomposite PCMs exhibited good leakage-proof performance andexcellent light–thermal *** compressive strengthof thecomposite PCMscan improveupto 1.602 *** indicatethatthisstrategy canbe efficiently usedtodevelop novel composite PCMswithimproved comprehensive thermalperformance and high light–thermal conversion.

关键词： carbon aerogels composite PCMs energy storage capacity solar-thermal conversion

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Bioinspired Multifunctional Self-Sensing Actuated Gradient Hydrogel for Soft-Hard Robot Remote Interaction

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Nano-Micro Letters 2024年第4期16卷 139-152页

作者： He Liu Haoxiang chu hailiang Yuan Deliang Li Weisi Deng Zhiwei Fu Ruonan Liu Yiying Liu Yixuan Han Yanpeng Wang Yue Zhao Xiaoyu Cui Ye Tian College of Medicine and Biological Information Engineering Northeastern UniversityShenyang 110169People’s Republic of China Foshan Graduate School of Innovation Northeastern UniversityFoshan 528300People’s Republic of China

The development of bioinspired gradient hydrogels with self-sensing actuated capabilities for remote interaction with soft-hard robots remains a challenging endeavor. Here, we propose a novel multifunctional self-sensing actuated gradient hydrogel that combines ultrafast actuation and high sensitivity for remote interaction with robotic hand. The gradient network structure, achieved through a wettability difference method involving the rapid precipitation of MoO_(2) nanosheets, introduces hydrophilic disparities between two sides within hydrogel. This distinctive approach bestows the hydrogel with ultrafast thermo-responsive actuation(21° s^(-1)) and enhanced photothermal efficiency(increase by 3.7 ℃ s^(-1) under 808 nm near-infrared). Moreover, the local cross-linking of sodium alginate with Ca^(2+) endows the hydrogel with programmable deformability and information display capabilities. Additionally, the hydrogel exhibits high sensitivity(gauge factor 3.94 within a wide strain range of 600%), fast response times(140 ms) and good cycling stability. Leveraging these exceptional properties, we incorporate the hydrogel into various soft actuators, including soft gripper, artificial iris, and bioinspired jellyfish, as well as wearable electronics capable of precise human motion and physiological signal detection. Furthermore, through the synergistic combination of remarkable actuation and sensitivity, we realize a self-sensing touch bioinspired tongue. Notably, by employing quantitative analysis of actuation-sensing, we realize remote interaction between soft-hard robot via the Internet of Things. The multifunctional self-sensing actuated gradient hydrogel presented in this study provides a new insight for advanced somatosensory materials, self-feedback intelligent soft robots and human–machine interactions.

关键词： Self-sensing Gradient structure Bioinspired actuator Hydrogel sensor Remote interaction

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