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In-situ C doped ZnO/CdS Z-scheme Heterostructure for Efficient Photocatalysis under Visible Light


Paper Type 
Contributed Paper
Title 
In-situ C doped ZnO/CdS Z-scheme Heterostructure for Efficient Photocatalysis under Visible Light
Author 
Longtao Zuo, Jun Li, Yang Jin, Changsheng Ban and Ming Chen
Email 
lijunlab@163.com
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.

Start & End Page 
1587 - 1605
Received Date 
2021-04-18
Revised Date 
2021-07-07
Accepted Date 
2021-08-19
Full Text 
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Correspondence & Author Name 
Keyword 
ZnO, C doped, CdS, photocatalyst, visible light response
Volume 
Vol.48 No.6 (November 2021)
DOI 
View:286 Download:37

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Chiang Mai Journal of Science

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