降级(电信)
光电流
双酚A
复合数
电极
光催化
化学工程
电化学
材料科学
介质阻挡放电
盐(化学)
化学
光化学
催化作用
复合材料
光电子学
有机化学
环氧树脂
物理化学
工程类
电信
计算机科学
作者
Yi Zhang,Hao Ma,Xinwei Chen,Wenbin Wang,Fangying Li,Qiang Tang,Yiping Shen,Yanqing Cong
标识
DOI:10.1016/j.jhazmat.2022.130250
摘要
Carbon quantum dots (CQDs) have been supported on WO3/TiO2-NRs using a hydrothermal method and a novel CQDs/WO3/TiO2-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/WO3/TiO2-NRs electrode exhibited a good degradation effect toward bisphenol A (BPA) (75.66 %) combined with the production of hydrogen (0.89 mmol) in Na2SO4 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/WO3/TiO2-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 Na2SO4 system or chlorinated compounds in the high chloride salt system.
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