Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction

	Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction
	Wan, Zhen 1,2; Zhang, Gaoke 1; Wu, Xiaoyong 1; Yin, Shu 3
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2017-06-15
卷号	207 页码:17-26
关键词	Z-scheme Bi12geo20/g-c3n4 Composite Oxygen-induced Pathway Kinetic Isotope Effect Proton Assisted Electron Transfer
英文摘要	We successfully synthesized novel solid state Z-scheme visible-light-driven Bi12GeO20/g-C3N4 composite photocatalysts and investigated their photocatalytic activities for degradation of microcystin-LR and RhB, and for reduction of aqueous Cr(VI). The TEM and HRTEM images clearly showed the heterogeneous nanostructures at the interface between Bi12GeO20 and g-C3N4. The as-prepared Bin GeO20/g-C3N4 composites exhibited enhanced photocatalytic activities for the degradation of microcystin-LR and RhB aqueous solution and reduction of aqueous Cr(VI) as compared to the pure Bi12GeO20 and g-C3N4 under visible-light irradiation. On the basis of the radical species trapping experiments and ESR analyses, Of and h(+) were confirmed to be the mainly active species involved in the degradation of organic pollutants and this reaction was identified to be an oxygen-induced pathway. Meanwhile, combined with the in situ ATR-FTIR spectroscopy and kinetic isotope effect investigations, the photocatalytic reduction of aqueous Cr(VI) was identified as a proton assisted electron transfer reaction. Moreover, the enhanced photocatalytic activities of the Bi12GeO20/g-C3N4 composites can be attributed to the improved photo-absorption properties and effective separation of photo-induced charge carriers caused by the Z-scheme system of the as-prepared Bi12GeO20/g-C3N4 composites. (C) 2017 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38241]
专题	化学研究所_光化学实验室
作者单位	1.Wuhan Univ Technol, Sch Resources & Environm Engn, Hubei Key Lab Mineral Resources Proc & Environm, Wuhan 430070, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China 3.Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
推荐引用方式 GB/T 7714	Wan, Zhen,Zhang, Gaoke,Wu, Xiaoyong,et al. Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,207:17-26.
APA	Wan, Zhen,Zhang, Gaoke,Wu, Xiaoyong,&Yin, Shu.(2017).Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction.APPLIED CATALYSIS B-ENVIRONMENTAL,207,17-26.
MLA	Wan, Zhen,et al."Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction".APPLIED CATALYSIS B-ENVIRONMENTAL 207(2017):17-26.