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journal article·2021-03

Preparation of CdS y Se 1− y ‐MoS 2 Heterostructures via Cation Exchange of Pre‐Epitaxially Synthesized Cu 2− χ S y Se 1− y ‐MoS 2 for Photocatalytic Hydrogen Evolution

Junze Chen, Xue‐Jun Wu, Qipeng Lu, Meiting Zhao, Peng‐Fei Yin, Qinglang Ma, Gwang‐Hyeon Nam, Bing Li, Bo Chen, Hua Zhang

Small· Volume 17· Issue 11
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Source abstract

Abstract

Abstract Construction of 2D transition metal dichalcogenide (TMD)‐based epitaxial heterostructures with different compositions is important for various promising applications, including electronics, photonics, and catalysis. However, the rational design and controlled synthesis of such kind of heterostructures still remain challenge, especially for those consisting of layered TMDs and other non‐layered materials. Here, a facile one‐pot, wet‐chemical method is reported to synthesize Cu 2− χ S y Se 1− y ‐MoS 2 heterostructures in which two types of different epitaxial configurations, i.e., vertical and lateral epitaxies, coexist. The chalcogen ratio (S/Se) in Cu 2− χ S y Se 1− y and the loading amount of MoS 2 in the heterostructures can be tuned. Impressively, the obtained Cu 2− χ S y Se 1− y ‐MoS 2 heterostructures can be transformed to CdS y Se 1− y ‐MoS 2 without morphological change via cation exchange. As a proof‐of‐concept application, the obtained CdS y Se 1− y ‐MoS 2 heterostructures with controllable compositions are used as photocatalysts, exhibiting distinctive catalytic activities toward the photocatalytic hydrogen evolution under visible light irradiation. The method paves the way for the synthesis of different TMD‐based lateral epitaxial heterostructures with unique properties for various applications.
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Research context

Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · 2D Materials and Applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China

School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China

Department of Chemistry City University of Hong Kong Hong Kong China

Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) 2 Fusionopolis Way, Innovis #08‐03 Singapore 138634 Singapore

Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM) City University of Hong Kong Hong Kong China

Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 China

Funding

City University of Hong Kong

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