A visible-light-driven Z-scheme CdS/Bi12GeO20 heterostructure with enhanced photocatalytic degradation of various organics and the reduction of aqueous Cr(VI)

被引：74

作者：

Ruan, Xiaowen ^{[1
]}

Hu, Hao ^{[1
]}

Che, Huinan ^{[1
]}

Jiang, Enhui ^{[1
]}

Zhang, Xiaoxu ^{[1
]}

Liu, Chunbo ^{[1
]}

Che, Guangbo ^{[2
]}

机构：

[1] Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jilin Normal Univ, Key Lab Preparat & Applicat Environm Friendly Mat, Minist Educ, Changchun 130103, Jilin, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2019年 / 543卷

基金：

中国国家自然科学基金;

关键词：

Z-scheme; CdS/Bi12GeO20; heterostructure; Photocatalytic degradation; Photocatalytic reduction; Degradation pathways; GRAPHITIC CARBON NITRIDE; STATE Z-SCHEME; FACILE FABRICATION; HETEROJUNCTION PHOTOCATALYSTS; MINERALIZATION ACTIVITY; CHARGE-CARRIERS; MECHANISM; PHOTODEGRADATION; TETRACYCLINE; PERFORMANCE;

D O I：

10.1016/j.jcis.2019.02.052

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 series of Z-scheme CdS/Bi12GeO20 heterostructures were successfully obtained by a simple hydrothermal method. The Z-scheme CdS/Bi12GeO20 heterostructures show outstanding photocatalytic performance for degrading the various organic pollutants of the waste water, and for the reduction of aqueous Cr(VI) under visible light. For degradation of 2-Mercaptobenzothiazole (MBT), the Z-scheme 30CdS/Bi12GeO20 heterostructure exhibits the superior rate constant, which is about 22.67 and 4.6 times higher than that of the pure Bi12GeO20 and CdS, respectively. Meanwhile, as we expected, the Z-scheme 30CdS/Bi12GeO20 heterostructure also displays the enhanced photocatalytic performance for degradation of Levofloxacin (LEV), Ciprofloxacin (CIP), Tetracycline (TC) and reduction of aqueous Cr(VI). The enhancement of photocatalytic performance is attributed to the high redox capacity and the strong interfacial interaction between CdS and Bi12GeO20, which can effectively improve the separation of photo induced electron-hole pairs. Additionally, the photocatalytic mechanism over the Z-scheme CdS/Bi12GeO20 heterostructure is provided. The research work may provide a promising approach to fabricate other Z-scheme heterostructures with efficient photocatalytic performance. (C) 2019 Published by Elsevier Inc.

引用

页码：317 / 327

页数：11

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