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Ultrasound-assisted synthesized BiFeO3 as FeOH+ promoted peroxymonosulfate activator for highly efficient degradation of tetracycline
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.jallcom.2020.157281
Hongjie Xing , Shitao Gao , Jingji Zhang , Yu Xu , Huiwei Du , Zejie Zhu , Jiangying Wang , Yaxuan Yao , Suwei Zhang , Lingling Ren

Abstract A multiferroic BiFeO3 (BFO) catalyst was fabricated through a mild one-pot hydrothermal process with a bath-ultrasound assisted dissolution of Fe(NO3)3·9H2O for 30 min. X-ray photoemission spectroscopy revealed that the BFO (BFO-u) catalyst with US assisted dissolution of Fe(NO3)3·9H2O in the synthetic process exhibited high Fe2+ and OH− levels, which could be explained to be Fe3+ + H2O → ) ) ) Fe2+ + H+ + •OH. As a result, BFO-u catalyst activated potassium peroxymonosulfate (PMS) efficiently for degrading tetracycline hydrochloride. In particular, visible-light assisted activation of PMS over BFO-u catalyst exhibited the highest degradation rate constant, at 0.352 min−1. Species-trapping experiments revealed that the presence of PMS promoted the generation of •OH, •O2− and 1O2 that all participated in degrading TCH, in which 1O2 was primarily contributed to the degradation. Also, BFO-u catalyst was stable and recyclable and thus suitable for practical applications.

中文翻译:

超声辅助合成的 BiFeO3 作为 FeOH+ 促进过硫酸盐活化剂高效降解四环素

摘要 通过温和的一锅水热法和超声浴辅助溶解Fe(NO3)3·9H2O 30 分钟,制备了多铁性BiFeO3 (BFO) 催化剂。X 射线光电子能谱显示,在合成过程中,美国辅助溶解 Fe(NO3)3·9H2O 的 BFO (BFO-u) 催化剂表现出高 Fe2+ 和 OH− 水平,这可以解释为 Fe3+ + H2O → ) ) ) Fe2+ + H+ + •OH。结果,BFO-u 催化剂有效地活化过硫酸钾 (PMS) 以降解四环素盐酸盐。特别是,可见光辅助 PMS 在 BFO-u 催化剂上的活化表现出最高的降解速率常数,为 0.352 min-1。物种捕获实验表明,PMS 的存在促进了 •OH、•O2- 和 1O2 的产生,这些都参与了降解 TCH,其中 1O2 主要促成了降解。此外,BFO-u 催化剂稳定且可回收,因此适用于实际应用。
更新日期:2021-02-01
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