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Study on performance and mechanism of CuO/CN catalysed peroxynitrite degradation of tetracycline
Received date: 2023-12-13
Online published: 2024-02-01
Non⁃homogeneous CuO/CN catalysts with different loadings were prepared by synthesis at room temperature and pyrolysis at high temperature for the degradation of tetracycline（TC） by activated peroxynitrite（PMS）.The materials were characterised in detail and the surface morphology and state of matter of the CuO/CN materials were evaluated by Fourier transform infrared spectroscopy（FT-IR），scanning electron microscopy（SEM），energy dispersive X-ray fluorescence spectrometry（EDS），X-ray powder diffractometry（XRD） and other characterisation techniques.The results showed that for the degradation of tetracycline by PMS，copper was uniformly loaded on CN in the form of CuO，which exhibited efficient catalytic performance.Under the conditions of tetracycline initial mass concentration of 20 mg/L，pH=5.5，PMS concentration of 0.3 mmol/L and 2.5% CuO/CN dosage of 0.2 g/L，the TC degradation rate reached 93.72% after 120 min of treatment.The active substances of the degradation process were analysed by bursting experiment and electron spin resonance（EPR） technique，and the results showed that 1O2 was the main active species in the TC degradation process.The TC degradation rate could still reach 86.39% after five cycling experiments，indicating that the catalyst had good stability and reusability.Therefore，CuO/CN had good application prospects in catalyzing the degradation of antibiotics such as TC by PMS.
Key words： CuO/CN; advanced oxidation; tetracycline; peroxymonosulfate
XIANG Wei , JING Yanna , CHEN Zhenghua , CHEN Xiao , JIN Yanchao . Study on performance and mechanism of CuO/CN catalysed peroxynitrite degradation of tetracycline[J]. Inorganic Chemicals Industry, 2024 , 56(8) : 123 -130 . DOI: 10.19964/j.issn.1006-4990.2023-0605
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