In-situ C doped ZnO/CdS Z-scheme Heterostructure for Efficient Photocatalysis under Visible Light
Longtao Zuo, Jun Li, Yang Jin, Changsheng Ban and Ming Chen* Author for corresponding; e-mail address: lijunlab@163.com
Volume: Vol.48 No.6 (November 2021)
Research Article
DOI:
Received: 18 April 2021, Revised: 7 July 2021, Accepted: 19 August 2021, Published: -
Citation: Zuo L., Li J., Jin Y., Ban C. and Chen M., In-situ C doped ZnO/CdS Z-scheme Heterostructure for Efficient Photocatalysis under Visible Light, Chiang Mai Journal of Science, 2021; 48(6): 1587-1605.
Abstract
Photocatalysis is one of the most promising and attractive types of technology for solving water pollution problems. In this work, Z scheme C-doped ZnO/CdS heterostructure is successfully prepared. In situ carbon-doped ZnO was prepared using ZIF-8 as the precursor. The optimum temperature for the preparation of C-doped ZnO has been discussed through XRD, TG, DTG analysis. From the XRD analysis, it is clear that the as-prepared composites compose of hexagonal phase ZnO and CdS. According to the TEM, XPS, Uv-vis analyses, a heterostructure is built between ZnO and CdS. The composites appear as spherical crystals and have enhanced light absorption properties. Nevertheless, the C-doped ZnO/CdS composites show improved photocatalytic performance. Under visible light, C-doped ZnO/CdS can degrade methylene blue by more than 98% within 80 min, which is 5 times of commercial nano ZnO. Besides, the C-doped ZnO/CdS composites still maintain a high photocatalytic performance after the cycling experiment. Moreover, C-ZnO/CdS possesses stronger photocatalytic properties than ZnO/CdS composites. Through ICP analysis, ESR analysis, and scavengers trapped experiment, it is proposed that C-ZnO/CdS heterostructure is a Z-type heterojunction.