过硫酸盐
单线态氧
降级(电信)
光化学
化学
猝灭(荧光)
激进的
光催化
水溶液
电子顺磁共振
催化作用
腐植酸
羟基自由基
高级氧化法
可见光谱
单重态
可重用性
氧气
材料科学
荧光
激发态
有机化学
核物理学
软件
程序设计语言
计算机科学
肥料
物理
电信
量子力学
光电子学
核磁共振
作者
Yuehua Deng,Qianqian Che,Yani Li,Jie Luo,Xiang Gao,Yiliang He,Yiling Liu,Tong Liu,Xiaolong Zhao,Xiaobin Hu,Wei Zhao
标识
DOI:10.1016/j.jes.2023.05.021
摘要
Non-radical activation of persulfate (PS) by photocatalysts is an effective approach for removing organic pollutants from aqueous environments. In this study, a novel Bi2O3/BiO1.3I0.4 heterojunction was synthesized using a facile solvothermal approach and used for the first time for non-radical activation of PS to degrade propranolol (PRO) in the presence of visible light. The findings found that the degradation rate of PRO in the Bi2O3/BiO1.3I0.4/PS system was significantly increased from 19% to more than 90% within 90 min compared to the Bi2O3/BiO1.3I0.4 system. This indicated that the composite system exerted an excellent synergistic effect between the photocatalyst and the persulfate-based oxygenation. Quenching tests and electron paramagnetic resonance demonstrated that the non-radical pathway with singlet oxygen as the active species played a major role in the photocatalytic process. The existence of photo-generated holes during the reaction could also be directly involved in the oxidation of pollutants. Meanwhile, a possible PRO degradation pathway was also proposed. Furthermore, the impacts of pH, humic acid and common anions on the PRO degradation by the Bi2O3/BiO1.3I0.4/PS were explored, and the system's stability and reusability were also studied. This study exhibits a highly productive catalyst for PS activation via a non-radical pathway and provides a new idea for the degradation of PRO.
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