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Study on degradation of tetracycline hydrochloride by high entropy oxide activated peroxymonsulfate
Received date: 2024-10-21
Online published: 2025-02-05
To address the issue of low efficiency in peroxymonsulfate activation catalyzed by single transition metal ions，a highdispersion rock-salt phase（Co0.2Cu0.2Mg0.2Ni0.2Zn0.2）O high entropy oxide was prepared by NaCl assisted solution combustion method.The crystal structure and morphology of high entropy oxide were characterized by X-ray diffraction（XRD），scanning electron microscopy（SEM），transmission electron microscopy（TEM），X-ray photoelectron spectroscopy（XPS） and nitrogen adsorption-desorption techniques.The catalytic activity of potassium peroxymonsulfate（PMS） activated by high-entropy oxide was investigated by tetracycline hydrochloride（TCH） degradation experiment.The effect of different influencing factors on the degradation of TCH by high entropy oxide activated PMS was investigated.The results showed that addition of inert inorganic salt NaCl effectively blocked the agglomeration of high entropy oxide particles.The rock-salt phase high entropy oxide particles had good dispersion.The degradation rate of TCH was 96% after 16 min reaction at catalyst concentration of 100 mg/L，PMS concentration of 100 mg/Land pH of 7.The results of free radical trapping experiments showed that the main active free radical in the catalytic system was SO4-·.The cyclic experiment results showed that the degradation rate of TCH by high-entropy oxide remained above 90% after five cycles，indicating excellent cyclic stability.High dispersion high-entropy oxide as high efficiency catalysts for potassium peroxymonosulfate had important application in industrial wastewater treatment field.
YAN Xin , BAI Hongwei . Study on degradation of tetracycline hydrochloride by high entropy oxide activated peroxymonsulfate[J]. Inorganic Chemicals Industry, 2025 , 57(11) : 115 -122 . DOI: 10.19964/j.issn.1006-4990.2024-0559
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