CuO/CN催化过一硫酸盐降解四环素性能及机理研究
收稿日期: 2023-12-13
网络出版日期: 2024-02-01
基金资助
福建省科技厅引导性项目(2019Y0010)
Study on performance and mechanism of CuO/CN catalysed peroxynitrite degradation of tetracycline
Received date: 2023-12-13
Online published: 2024-02-01
利用室温合成和高温热解法制备了不同负载量的CuO/CN非均相催化剂，用于活化过一硫酸盐（PMS）降解四环素（TC）。通过傅里叶变换红外光谱仪（FT-IR）、扫描电子显微镜（SEM）、能量色散X射线荧光光谱仪（EDS）、X射线粉末衍射仪（XRD）等表征仪器对材料进行了详细表征，评价了CuO/CN材料的表面形貌和物质状态。结果表明，铜以CuO的形式均匀地负载在CN上，并对PMS降解四环素表现出高效的催化性能。在四环素初始质量浓度为20 mg/L、pH=5.5、PMS浓度为0.3 mmol/L、2.5%CuO/CN投加量为0.2 g/L的条件下，处理120 min后TC降解率达93.72%。采用猝灭实验和电子自旋共振（EPR）技术分析降解过程的活性物质，结果表明1O2是TC降解过程的主要活性物种。催化剂历经5次循环实验后，TC降解率仍能够达到86.39%，表明催化剂具有较好的稳定性和重复使用性。因此，CuO/CN在催化PMS降解TC等抗生素方面具有良好的应用前景。
项伟 , 景燕娜 , 陈铮华 , 陈晓 , 金延超 . CuO/CN催化过一硫酸盐降解四环素性能及机理研究[J]. 无机盐工业, 2024 , 56(8) : 123 -130 . DOI: 10.19964/j.issn.1006-4990.2023-0605
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
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