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J Hazard Mater

Title:		Oxygen vacancies enhanced photocatalytic activity towards VOCs oxidation over Pt deposited Bi(2)WO(6) under visible light
Author(s):		Zhang S; Pu W; Chen A; Xu Y; Wang Y; Yang C; Gong J;
Address:		"School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China. Electronic address: jygong@hust.edu.cn"
Journal Title:		J Hazard Mater
Year:		2020
Volume:		20191014
Issue:
Page Number:		121478 -
DOI:		10.1016/j.jhazmat.2019.121478
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"A novel Pt assisted self-modified Bi(2)WO(6) composites (Pt/Bi-BWO) with high oxygen vacancies concentration was successfully fabricated via a simple in-situ NaBH(4) reduction method in presence of H(2)PtCl(6)*6H(2)O. The Pt/Bi-BWO performed excellent photocatalytic activity on the degradation of gaseous toluene under visible light illumination. The photocatalytic reaction rate of 0.15% Pt/Bi-BWO was 2.88 times higher than that of Bi(2)WO(6). Over 90% gas phase toluene was removed by 0.15% Pt/Bi-BWO in one hour and over 80% of which was degraded into CO(2) and H(2)O. The Pt/Bi-BWO also performed great stability confirmed by circulating runs test. The mechanism of the promotion was explored by electron paramagnetic resonance (EPR) and DFT calculations. The produced oxygen vacancies were below conduction band (CB) of Bi(2)WO(6), leading to a narrowed band gap. Meantime, the generated oxygen vacancies could activate O(2) to enhance the production of reactive oxygen species (ROS), such as O(2)(-) and OH. In addition, the added Pt could act as electron trap to suppress the recombination of electrons-holes pairs. In a word, this work produced a novel simply made photocatalyst to remove volatile organic compounds"
Keywords:		Bi(2)WO(6) Oxygen vacancies Photocatalytic oxidation Pt VOCs;
Notes:		"PubMed-not-MEDLINEZhang, Shuoshuo Pu, Wenhong Chen, Ayan Xu, Yake Wang, Yunyang Yang, Changzhu Gong, Jianyu eng Research Support, Non-U.S. Gov't Netherlands 2019/10/28 J Hazard Mater. 2020 Feb 15; 384:121478. doi: 10.1016/j.jhazmat.2019.121478. Epub 2019 Oct 14"