Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (3): 484-489.doi: 10.1007/s40242-024-4022-8

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Nanostructured ZnO/ZnS with Type-II Hetero-junction for Efficient CO2 Photoreduction

XIAO Qi1, LIU Ting2, ZHOU Qianhe3, LI Liangyu3, CHANG Chuntao4, GAO Dawei3, LI Danyang3, YOU Feifei3   

  1. 1. School of Textile Garment and Design, Changshu Institute of Technology, Changshu 215500, P. R. China;
    2. School of Civil and Environmental Engineering, The University of New South Wales, Australia;
    3. College of Textile and Clothing, Yancheng Institute of Technology, Yancheng 224051, P. R. China;
    4. Jiangsu Yueda Cotton Spinning Co., Ltd., Yancheng 224051, P. R. China
  • Received:2024-01-23 Online:2024-06-01 Published:2024-06-01
  • Contact: CHANG Chuntao,E-mail:Changchuntao99@163.com;LI Danyang,E-mail:D.Y.Li@ycit.edu.cn;YOU Feifei,E-mail:ffyou@ycit.edu.cn E-mail:Changchuntao99@163.com;D.Y.Li@ycit.edu.cn;ffyou@ycit.edu.cn
  • Supported by:
    This work was supported by the Funding for School-level Research Projects of Yancheng Institute of Technology, China (Nos. xjr2021054, xjr2021056) and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 23KJD540001).

Abstract: Photocatalytic CO2 reduction driven by solar light is a green approach that can decrease the greenhouse effect induced by high CO2 concentration in the atmosphere and generate carbon-based chemicals/fuels as well. In this paper, non-metal co-catalysts ZnO/ZnS type-II hetero-junction nanoparticles with a rough surface were prepared through a hydrothermal process. When used as a photocatalyst for CO2 reduction, the optimal one showed good cycle stability and a higher yield rate of 27.8 μmol·g–1·h–1 for CO2 conversion into CO. The outstanding catalytic activity originated from the rich interfaces between ZnO and ZnS in the nanoscale could significantly reduce the delivery path of carriers and improve the utilization efficiency of photo-excited electron/hole pairs and the enriched surface oxygen defects could supply much more reaction active sites for CO2 adsorption.

Key words: ZnO/ZnS, Photocatalytic, CO2 reduction, Oxygen defect