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CoFe2O4/WS2 as a highly active heterogeneous catalyst for the efficient degradation of sulfathiazole by activation of peroxymonosulfate
Journal of Water Process Engineering ( IF 6.3 ) Pub Date : 2023-12-23 , DOI: 10.1016/j.jwpe.2023.104714
Yajuan Li , Qiongfang Wang , Xin Zhang , Lei Dong , Yulin Yuan , Cheng Peng , Min Zhang , Pinhua Rao , Md. Nahid Pervez , Naiyun Gao

In this study, MFe2O4/WS2 (M = Co, Cu, Mn, Ni) catalysts were synthesized to activate peroxymonosulfate (PMS) for sulfathiazole (STZ) degradation by decorating with WS2 on the surface of a series of spinel-type transition metal oxides. It was found that the CoFe2O4/WS2/PMS exhibited a greater ability to degrade sulfathiazole (STZ) than other systems. More specifically, the catalyst facilitated Fe3+/Fe2+ recycling to activate PMS efficiently and maintained synergies between CoFe2O4 and WS2 to degrade pollutants. The CoFe2O4/WS2 dosage, PMS concentration, solution pH, inorganic anions, and natural organic matter, which could affect the catalytic efficiency, were inspected. The experimental results manifested that the catalyst displayed outstanding performance in the pH range from 5 to 9. Besides, electron paramagnetic resonance spectroscopy and radical quenching experiments confirmed the presence of HO•, SO4•−, O2•−, and 1O2. Based on detected intermediates, the plausible degradation pathway of STZ was proposed.



中文翻译:

CoFe2O4/WS2作为高活性多相催化剂,通过过一硫酸盐的活化有效降解磺胺噻唑

本研究合成了MFe 2 O 4 /WS 2 (M = Co, Cu, Mn, Ni)催化剂,通过在一系列尖晶石表面修饰WS 2来活化过一硫酸盐(PMS)以降解磺胺噻唑(STZ)。型过渡金属氧化物。结果发现,CoFe 2 O 4 /WS 2 /PMS 比其他体系表现出更强的降解磺胺噻唑(STZ)的能力。更具体地说,该催化剂促进Fe 3+ /Fe 2+回收以有效激活PMS,并保持CoFe 2 O 4和WS 2之间的协同作用以降解污染物。考察了影响催化效率的CoFe 2 O 4 /WS 2用量、PMS浓度、溶液pH、无机阴离子和天然有机物。实验结果表明,该催化剂在pH 5~9范围内表现出优异的性能。此外,电子顺磁共振波谱和自由基猝灭实验证实了HO•、SO 4 •−、O 2 •−1 O 2的存在。 。根据检测到的中间体,提出了 STZ 的合理降解途径。

更新日期:2023-12-24
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