In-situ preparation of mossy tile-like ZnIn2S4/Cu2MoS4 S-scheme heterojunction for efficient photocatalytic H2 evolution under visible light

Shikai Wang; Dafeng Zhang; Ping Su; Xintong Yao; Junchang Liu; Xipeng Pu; Hengshuai Li; Peiqing Cai

doi:10.1016/j.jcis.2023.07.052

In-situ preparation of mossy tile-like ZnIn₂S₄/Cu₂MoS₄ S-scheme heterojunction for efficient photocatalytic H₂ evolution under visible light

J Colloid Interface Sci. 2023 Nov 15;650(Pt A):825-835. doi: 10.1016/j.jcis.2023.07.052. Epub 2023 Jul 10.

Authors

Shikai Wang¹, Dafeng Zhang¹, Ping Su¹, Xintong Yao¹, Junchang Liu¹, Xipeng Pu², Hengshuai Li³, Peiqing Cai⁴

Affiliations

¹ School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
² School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China. Electronic address: xipengpu@hotmail.com.
³ Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, PR China.
⁴ College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, PR China.

PMID: 37450971
DOI: 10.1016/j.jcis.2023.07.052

Abstract

The reasonable design and fabrication of heterojunction could regulate the photocatalytic performance to some extent, yet it is still a great challenge to construct the S-scheme heterostructure with the stable as well as tight interface on the surface of semiconductor photocatalysts. Herein, the ZnIn₂S₄/Cu₂MoS₄ (ZIS/CMS) S-scheme heterostructure was fabricated by in-situ assembling ZIS nanosheets on the CMS plates, obtaining a mossy tile-like morphology. Owing to the compact interface resulting from in-situ growth, this unique architecture efficiently facilitated the separation and transfer of light-induced charges, guaranteed the larger interface area, and enriched the active sites for photocatalytic redox reactions. After adjusting the mass ratio of CMS in ZIS/CMS, S-scheme heterostructure exhibited the remarkable performance with an optimal H₂ producing rate up to 1298 μmol·h^-1 g^-1, about 13.8 times than that of pristine ZIS. The mechanism and driving force of charge transfer and separation in S-scheme heterostructure photocatalysts were explained and discussed. This investigation will provide new insight into design and construction of S-scheme heterojunction photocatalysts for H₂ evolution.

Keywords: Cu(2)MoS(4); H(2) evolution; Heterojunction; S-scheme; ZnIn(2)S(4).