Synthesis and characterization of successive Z-scheme CdS/Bi2MoO6/BiOBr heterojunction photocatalyst with efficient performance for antibiotic degradation

被引：139

作者：

Wang, Ruoxu ^{[1
]}

Zhu, Pengfei ^{[1
,2
]}

Duan, Ming ^{[1
,3
]}

Xu, Jing ^{[1
]}

Liu, Mei ^{[1
]}

Luo, Dan ^{[1
]}

机构：

[1] Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Peoples R China

[2] Southwest Petr Univ, Res Inst Ind Hazardous Waste Disposal & Resource, Chengdu 610500, Sichuan, Peoples R China

[3] Southwest Petr Univ, Oil & Gas Field Appl Chem Key Lab Sichuan Prov, Chengdu 610500, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 870卷

基金：

中国国家自然科学基金;

关键词：

Bi2MoO6; BiOBr; CdS; Heterojunction structure; Tetracycline hydrochloride; STATE Z-SCHEME; HIGHLY EFFICIENT; HYDROTHERMAL SYNTHESIS; SELECTIVE ADSORPTION; FACILE CONSTRUCTION; CADMIUM-SULFIDE; CHARGE-TRANSFER; CARBON NITRIDE; QUANTUM DOTS; DRIVEN;

D O I：

10.1016/j.jallcom.2021.159385

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel CdS/Bi2MoO6/BiOBr successive Z-scheme photocatalyst has been synthesized by a solvothermalprecipitation method. The structure, composition, morphology and optical property of the ternary composite were investigated. The maximum degradation rate of CdS/Bi2MoO6/BiOBr for tetracycline hydrochloride (TC) can reach 94.41% under visible light, while its degradation rate was 10.43, 2.89, and 2.43 times higher than that of pure Bi2MoO6, BiOBr and Bi2MoO6/BiOBr, respectively. Besides, the CdS/Bi2MoO6/BiOBr composite showed stable catalytic performance after three successive reuses. The improved photo catalytic and stability could be ascribed to the extended visible-light absorption capability, effective separation of electron-hole pairs and layered stable structure. Photoluminescence spectroscopy and electrochemical impedance spectroscopy proved that the composite had more efficient charge separation efficiency. The energy band structure and free radical capturing experiments proved that the redox reaction mainly occurred in the conduction band of CdS and the valence band of BiOBr in this composite, so a possible successive Z-scheme heterojunction mechanism is proposed. This work also provides a feasible idea for the treatment of TC in wastewater. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：14

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