CQDs improved the photoelectrocatalytic performance of plasma assembled WO 3 /TiO 2 -NRs for bisphenol A degradation.

Autor: Zhang Y; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Ma H; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Chen X; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Wang W; Huzhou South Taihu Environmental Protection & Technology Development Co., Ltd., Huzhou 313000, China., Li F; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Qiang T; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Shen Y; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China., Cong Y; School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China. Electronic address: yqcong@zjgsu.edu.cn.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2023 Feb 05; Vol. 443 (Pt B), pp. 130250. Date of Electronic Publication: 2022 Oct 26.
DOI: 10.1016/j.jhazmat.2022.130250
Abstrakt: Carbon quantum dots (CQDs) have been supported on WO 3 /TiO 2 -NRs using a hydrothermal method and a novel CQDs/WO 3 /TiO 2 -NRs composite formed via dielectric barrier discharge. The composite electrodes were characterized using morphology, structural, optical and electrochemical analysis. The CQDs were successfully prepared on the composite electrode with the highest photocurrent density reaching 2.51 mA·cm -2 under UV-visible light irradiation (100 mW·cm -2 ) and an applied voltage of 0.6 V vs. Ag/AgCl. The CQDs/WO 3 /TiO 2 -NRs electrode exhibited a good degradation effect toward bisphenol A (BPA) (75.66 %) combined with the production of hydrogen (0.89 mmol) in Na 2 SO 4 system after 2 h of the photoelectrocatalytic (PEC) reaction and the BPA degradation rate reached 100 % after 7 min of reaction in both simulated and real seawater. The CQDs/WO 3 /TiO 2 -NRs exhibited excellent stability and efficient PEC performance in which the CQDs acted as electron reservoirs to capture and promote charge separation. Our analysis of intermediates of BPA degradation indicated the possible degradation pathways that mainly formed BPA polymers in the Na 2 SO 4 system or chlorinated compounds in the high chloride salt system.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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