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Engineering two-dimensional metal oxides and chalcogenides for enhanced electro-and photocatalysis

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Science Bulletin 2021年第12期66卷 1228-1252,M0004页

作者： Yichao Wang Baiyu Ren Jian Zhen Ou Kai Xu Chunhui Yang Yongxiang Li Haijiao Zhang School of Engineering RMIT UniversityMelbourneVic 3000Australia Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China Key Laboratory of Advanced Technologies of Materials.Ministry of Education School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Engineering Western Sydney University.PenrithNSW 2751Australia

Two-dimensional(2D)metal oxides and chalcogenides(MOs&MCs)have been regarded as a new class of promising electro-and photocatalysts for many important chemical reactions such as hydrogen evolution reaction,CO_(2) reduction reaction and N2 reduction reaction in virtue of their outstanding physicochemical ***,pristine 2D MOs&MCs generally show the relatively poor catalytic performances due to the low electrical conductivity,few active sites and fast charge ***,considerable efforts have been devoted to engineering 2D MOs&MCs by rational structural design and chemical modification to further improve the catalytic ***,we comprehensively review the recent advances for engineering technologies of 2D MOs&MCs,which are mainly focused on the intercalation,doping,defects creation,facet design and compositing with functional ***,the relationship between morphological,physicochemical,electronic,and optical properties of 2D MOs&MCs and their electro-and photocatalytic performances is also systematically ***,we further give the prospect and challenge of the field and possible future research directions,aiming to inspire more research for achieving high-performance 2D MOs&MCs catalysts in energy storage and conversion fields.

关键词： Two-dimensional materials metal oxides metal chalcogenides Electrocatalysis Photocatalysis

metal chalcogenide-based photoelectrodes for photoelectrochemical water splitting

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Journal of Energy Chemistry 2022年第10期31卷 189-213,I0005页

作者： Marwa Mohamed Abouelela Go Kawamura Atsunori Matsuda Department of Electrical and Electronic Information Engineering Toyohashi University of TechnologyToyohashi 441-8580AichiJapan Petrochemical Department Egyptian Petroleum Research InstituteCairo 11727Egypt

Photoelectrochemical water splitting(PEC-WS)is a promising technique for transforming solar energy into storable and environmentally friendly chemical *** semiconductor photoelectrodes with high light absorption capability,rapid e-/h+separation and transfer,and sufficient chemical stability is vital for developing an efficient PEC-WS *** chalcogenides(MCs)have emerged as promising candidates for light absorbers because of their unique electrical and optical *** this review,we present recent developments in hydrogen generation via PEC-WS using MC-based ***,we present a simple illustration of PEC-WS ***,the current performance of various metal(mono-,di-,and tri-)chalcogenide/semiconductor photoelectrodes in PEC-WS is ***,the charge transfer mechanism at the MC/semiconductor interface and the PEC-WS mechanism is thoroughly ***,we discuss future research perspectives toward developing efficient and stable MC/semiconductor photoelectrodes.

关键词： Photoelectrochemical water splitting metal chalcogenides Photoelectrode Energy conversion

Crystal phase control in two-dimensional materials

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Science China Chemistry 2018年第10期61卷 1227-1242页

作者： Jialiang Wang Yang Wei Hai Li Xiao Huang Hua Zhang Institute of Advanced Materials(IAM) Nanjing Tech University (NanjingTech) Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University

It is the nature of crystals to exist in different polymorphs. The recent emergence of two-dimensional(2 D) materials has evoked the discovery of a number of new crystal phases that are different from their bulk structures at ambient conditions, and revealed novel structure-dependent properties, which deserve in-depth understanding and further exploration. In this contribution, we review the recent development of crystal phase control in 2 D materials, including group V and VI. transition metal dichalcogenides(TMDs), group IVA metal chalcogenides and noble metals. For each group of materials, we begin with introducing the various existing crystal phases and their structure-related properties, followed by a detailed discussion on factors that influence these crystal structures and thus the possible strategies for phase control. Finally, after summarizing the whole paper, we present the challenges and opportunities in this research direction.

关键词： crystal phase control metal chalcogenides noble metals two-dimensional materials

Recent development of nanomaterials for carbon dioxide electroreduction

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SmartMat 2022年第1期3卷 35-53页

作者： Jianjun Su Yong Liu Yun Song Libei Huang Weihua Guo Xiaohu Cao Yubing Dou Le Cheng Geng Li Qiushi Hu Ruquan Ye Department of Chemistry State Key Laboratory of Marine PollutionCity University of Hong KongHong KongChina City University of Hong Kong Shenzhen Research Institute ShenzhenChina

Electrochemical CO_(2) reduction reaction(CO_(2)RR)to produce value‐added products has received tremendous research attention in recent *** research efforts across the globe,remarkable advancement has been achieved,including the improvement of selectivity for the reduction products,the realization of efficient reduction beyond two electrons,and the delivery of industrially relevant current *** this review,we introduce the recent development of nanomaterials for CO_(2)RR,including the zero‐dimensional graphene quantum dots,two‐dimensional materials such as metal chalcogenides and metal/covalent organic framework,singleatom catalysts,and nanostructured metal *** engineering of materials into three‐dimensional structure will also be ***,we will provide a summary of the catalytic performance and perspectives on future development.

关键词： CO_(2)reduction graphene quantum dots metal chalcogenides multielectrons products nanostructured metals single‐atom catalysts

A New 1-D Chain ofγ-Hg_(3)S_(2)Br_(2)Constructed from Hg_(4)S_(4)Squares:Solid-state Synthesis,Structure and Optical Properties

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Chinese Journal of Structural Chemistry 2021年第2期40卷 264-269,148页

作者： DIAO Jian-Feng XIE Zhi-Xin LI Pei-Xin GUO Guo-Cong College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Department of Chemistry Faculty of Arts and ScienceUniversity of TorontoTorontoOntario M5S3H6Canada

A new metal chalcogenide,γ-Hg_(3)S_(2)Br_(2)(1),has been prepared by moderate-temperature solid-state reaction,and its crystal structure was determined by single-crystal X-ray diffraction *** 1 crystallizes in space group Cmmm of orthorhombic system with a=9.1923(18),b=18.2262(5),c=4.6251(7)Å,V=774.9(3)Å^(3)and Z=*** the structure,two Hg(1),two Hg(2)and four S(1)atoms form a near square Hg_(4)S_(4),and such squares are linked by Hg(3)atoms nearly linearly coordinated to two S1 atoms of two parallel Hg_(4)S_(4)squares to form one-dimensional infinite Hg_(6)S_(4)chains along c *** absorption spectra reveal the presence of sharp optical gap of 2.80 eV for *** spectrum,TGA and electric resistivity have been investigated.

关键词： crystal structure metal chalcogenides resistance semiconductor solid-state reaction

Large-area growth of synaptic heterostructure arrays for integrated neuromorphic visual perception chips

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Chip 2024年第2期3卷 88-95页

作者： Yao Deng Shenghong Liu Manshi Li Na Zhang Yiming Feng Junbo Han Yury Kapitonov Yuan Li Tianyou Zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Centre Department of PhysicsHuazhong University of Science and TechnologyWuhan 430074China Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Photonics Saint Petersburg State UniversitySaint Petersburg 199034Russia Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

Two-dimensional metal chalcogenides have garnered significant attention as promising candidates for novel neuromorphic synaptic devices due to their exceptional structural and optoelectronic ***,achieving large-scale integration and practical applications of synaptic chips has proven to be challenging due to significant hurdles in materials preparation and the absence of effective nanofabrication *** a recent breakthrough,we introduced a revolutionary allopatric defect-modulated Fe_(7)S_(8)@MoS_(2)synaptic heterostructure,which demonstrated remarkable optoelectronic synaptic response *** upon this achievement,our current study takes a step further by presenting a sulfurization-seeding synergetic growth strategy,enabling the large-scale and arrayed preparation of Fe_(7)S_(8)@MoS_(2)***,a three-dimensional vertical integration technique was developed for the fabrication of arrayed optoelectronic synaptic ***,we have successfully simulated the visual persistence function of the human eye with the adoption of the arrayed *** synaptic devices exhibit a remarkable ability to replicate the preprocessing functions of the human visual system,resulting in significantly improved noise reduction and image recognition *** study might mark an important milestone in advancing the field of optoelectronic synaptic devices,which significantly prompts the development of mature integrated visual perception chips.

关键词： Two-dimensional(2D) metal chalcogenides Heterostructures Optoelectronic synapse Artificial vision

Biotoxicity of CdS/CdSe Core-Shell Nano-Structures

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Advances in Nanoparticles 2016年第1期5卷 1-8页

作者： Sreenu Bhanoth Anuraj S. Kshirsagar Pawan K. Khanna Aakriti Tyagi Anita K. Verma Nanochemistry R & D Lab Department of Applied Chemistry Defence Institute of Advanced Technology (DIAT) Ministry of Defence Government of India Girinagar Pune-411 021 India Nano Bio-Tech Lab Department of Zoology Kirorimal College University of Delhi Delhi India

The cytotoxicity of hydrophobic QDs CdS/CdSe was tested assigning MTT assay on Human Embryonic Kidney cells (HEK-293), breast cancer cells (MCF-7) and Enrichlish Ascitices Cells (EAC). Approximately 65% bio-toxicity was observed in MCF-7 for the core-shell QDs. These QDs may also find effective applications in other optoelectronic devices. CdS/CdSe core-shell hetrostructure quantum dots (QDs) were generated by chemical reaction between the respective chalcogens and cadmium metal salt. Sulphur powder was utilized for CdS core preparation while selenium was extracted from an organoselenium compound to impart CdSe shell layer at a temperature between 150℃ - 200℃. So-prepared core-shell QDs showed good optical properties. The particle size was found to be in the range of 3 - 4 nm with spherical morphology and cubic crystal structure.

关键词： Quantum Dots metal chalcogenides Bio-Toxicity Cell Lines