期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 948, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.169692
关键词
Photocatalysis; Hydrogen production; ZnS; Heterojunction
CdIn2S4/ZnS (CIS/ZnS) nanocomposites were prepared using a one-step hydrothermal method and characterized by various techniques. The CdIn2S4/xZnS composites showed superior photocatalytic activity compared to pure ZnS and CdIn2S4, with the CdIn2S4/12ZnS catalyst exhibiting the best performance. The enhanced performance of CdIn2S4/xZnS can be attributed to the strong interaction, Z-scheme heterojunction formation, efficient charge separation, extended light response, and stronger redox properties. Additionally, the proposed hydrogen production mechanism suggests a Z-scheme photosystem. This study provides an effective method for modifying ZnS catalysts for photocatalytic hydrogen evolution.
In this paper, CdIn2S4/ZnS (CIS/ZnS) nanocomposites were prepared by a one-step hydrothermal method. The structures and physicochemical properties of the nanocomposites were characterized by XRD, SEM, TEM, XPS, UV-Vis, TPR, EIS, PL, and ESR. The photocatalytic activity of CdIn2S4/xZnS composites for water splitting hydrogen evolution (the molar ratio of CdIn2S4 and ZnS is 1: x) is much better than that of the pristine ZnS and CdIn2S4. The optimal catalyst CdIn2S4/12ZnS exhibits the best performance. The hydrogen production rate reaches 3743 mu mol center dot g-1 center dot h-1, which is about 59.1 and 14.4 times that of pure CdIn2S4 and ZnS. The reasons for the better performance of CdIn2S4/xZnS are the strong interaction between CdIn2S4 and ZnS, the formation of Z-scheme heterojunction, the more efficient charge separation, the extension light re-sponse in comparison with the single component, and the stronger redox properties. Moreover, the possible hydrogen production mechanism is proposed by the study of VB-XPS, Mott-Schottky, and EPR, which im-plies it is a Z-scheme photosystem. This work provides an effective method for the modification of ZnS catalysts for the application in photocatalytic hydrogen evolution. (c) 2023 Elsevier B.V. All rights reserved.
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