化学
催化作用
降级(电信)
钙钛矿(结构)
猝灭(荧光)
反应速率常数
X射线光电子能谱
过硫酸盐
核化学
无机化学
化学工程
动力学
荧光
有机化学
电信
计算机科学
工程类
物理
量子力学
作者
Xuefei Zhou,Jiacheng Li,Huichao Guo,Yalei Zhang,Libin Yang,Jiabin Chen
标识
DOI:10.1016/j.seppur.2022.122359
摘要
Sulfate radical-based technologies have been frequently applied to degrade pharmaceutical and personal care products (PPCPs). Metal-based catalysts have shown great potential for activating persulfate (PS) and peroxymonosulfate (PMS) to degrade PPCPs. In this study, a Ru-based perovskite (ARuO3, A = La, Ba, Ce, Sr) was synthesized by the sol–gel method and used as a catalyst to activate PMS for the degradation of carbamazepine (CBZ). Results demonstrated that the A-site cations had a significant influence on the catalytic performance of the perovskite, and the degradation efficiency of CBZ in descending order for different Ru-based perovskites was as follows: La > Ba > Sr > Ce. LaRuO3 was selected as the optimal catalyst for CBZ degradation. LaRuO3 efficiently activated PMS to degrade CBZ in a neutral environment. The reaction rate constant had a positive linear correlation with the concentration of PMS in a range between 0.1 mM and 0.5 mM. ESR analysis and radical quenching experiments confirmed the existence of 1O2, •OH, and SO4•− in the LaRuO3/PMS system, and SO4•− played the most significant role in decomposing CBZ. The recycling experiment and XPS spectra suggested the stability of LaRuO3.
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