Preparation of CdSySe1−y-MoS2 Heterostructures via Cation Exchange of Pre-Epitaxially Synthesized Cu2−χSySe1−y-MoS2 for Photocatalytic Hydrogen Evolution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Junze Chen
  • Xue-Jun Wu
  • Qipeng Lu
  • Meiting Zhao
  • Peng-Fei Yin
  • Qinglang Ma
  • Gwang-Hyeon Nam
  • Bing Li
  • Bo Chen

Detail(s)

Original languageEnglish
Article number2006135
Journal / PublicationSmall
Volume17
Issue number11
Online published19 Feb 2021
Publication statusPublished - 18 Mar 2021

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 Cu2−χSySe1−y-MoS2 heterostructures in which two types of different epitaxial configurations, i.e., vertical and lateral epitaxies, coexist. The chalcogen ratio (S/Se) in Cu2−χSySe1−y and the loading amount of MoS2 in the heterostructures can be tuned. Impressively, the obtained Cu2−χSySe1−y-MoS2 heterostructures can be transformed to CdSySe1−y-MoS2 without morphological change via cation exchange. As a proof-of-concept application, the obtained CdSySe1−y-MoS2 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.

Research Area(s)

  • Cu 2−χS ySe 1−y, epitaxial growth, heterostructure, MoS 2, photocatalytic hydrogen evolution

Citation Format(s)

Preparation of CdSySe1−y-MoS2 Heterostructures via Cation Exchange of Pre-Epitaxially Synthesized Cu2−χSySe1−y-MoS2 for Photocatalytic Hydrogen Evolution. / Chen, Junze; Wu, Xue-Jun; Lu, Qipeng; Zhao, Meiting; Yin, Peng-Fei; Ma, Qinglang; Nam, Gwang-Hyeon; Li, Bing; Chen, Bo; Zhang, Hua.

In: Small, Vol. 17, No. 11, 2006135, 18.03.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review