Preparation of WO3/BiOCl0.7I0.3 photocatalyst and its photocatalytic degradation mechanism

被引：0
|
作者：
Liu H. [1 ]
Meng W. [1 ]
Huang Z. [1 ]
You Y. [1 ]
Hua R. [1 ]
Cao M. [1 ]
机构：
[1] College of Environmental Science and Engineering, Suzhou University of Science and Technology, Jiangsu, Suzhou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 01期
关键词：
catalysis; composites; photodegradation; visible light; WO[!sub]3[!/sub]/BiOCl[!sub]0.7[!/sub]I[!sub]0.3[!/sub;
D O I：
10.16085/j.issn.1000-6613.2022-0454
中图分类号：
学科分类号：
摘要：
The WO3/BiOCl0.7I0.3 composite photocatalytic materials were prepared by simple calcination method and in-situ precipitation method. The microstructure and chemical composition of the synthesized materials were characterized by XRD, SEM, XPS and UV-Vis DRS. The photocatalytic performance of the WO3/BiOCl0.7I0.3 composite was evaluated by the visible light catalytic degradation of 20mg/L tetracycline hydrochloride. The results showed that the WO3/BiOCl0.7I0.3 composite had better photocatalytic performance than the single BiOCl0.7I0.3 and WO3. When the molar ratio of W to Bi was 1∶15, the composite had the highest photodegradation rate, reaching the maximum value of 93.84% at 60 min under visible light and still had good photocatalytic activity after four cycles of test. The results of free radical capture test and electron spin resonance spectroscopy were analyzed. It was found that h+ and •O2- were identified as the main active substances in photocatalysis. The photocatalytic mechanism of Z-type heterostructure of WO3/BiOCl0.7I0.3 composite was proposed. The research provided a new idea for the development of new visible light photocatalytic materials and a new way for the treatment of antibiotic wastewater. © 2023 Chemical Industry Press. All rights reserved.
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页码：255 / 264
页数：9
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