摘要
采用共沉淀法合成了尖晶石型双金属氧化物CuFe_(2)O_(4)。基于X射线衍射光谱(XRD)、扫描电子显微镜(SEM)、能量色散光谱(EDS)等技术手段对CuFe_(2)O_(4)进行了分析表征。研究考察了CuFe_(2)O_(4)活化K_(2)S_(2)O_8对氧氟沙星的催化降解性能,讨论了CuFe_(2)O_(4)投加量、K_(2)S_(2)O_8使用量、溶液初始pH等条件对氧氟沙星降解效果的影响。结果表明,当CuFe_(2)O_(4)投加量为0.50/L、K_(2)S_(2)O_8用量为1.0 mmol/L、初始pH为7.20的条件下反应1 h时,氧氟沙星降解率为97.7%。催化剂循环实验结果显示,CuFe_(2)O_(4)展现了良好的重复利用性能。通过自由基猝灭和电子顺磁光谱测定,反应体系存在·OH、·SO_(4)^(-)和·O_(2)^(-)3种活性物种。最后给出了CuFe_(2)O_(4)/K_(2)S_(2)O_8体系活性物种产生的作用机理。
The spinel bimetallic oxide CuFe_(2)O_(4)was synthesized by coprecipitate method and characterized by X-ray diffraction spectroscopy(XRD),scanning electron microscopy(SEM),energy dispersion spectroscopy(EDS).The catalytic degradation performance of K_(2)S_(2)O_(8)activated by CuFe_(2)O_(4)for ofloxacin was investigated.The effects of CuFe_(2)O_(4) dosage,K_(2)S_(2)O_(8) dosage and initial pH of solution on the degradation of ofloxacin were discussed.The results showed that the degradation rate of ofloxacin was 97.7%when the dosage of CuFe_(2)O_(4) was 0.50 g/L,K_(2)S_(2)O_(8) concentration was 1.0 mmol/L,and the initial pH was 7.20.The results of catalyst recycling showed that CuFe_(2)O_(4) had super reuse performance.The active species·OH,·SO_(4)^(-) and·O_(2)^(-) existed in this reaction system by radical quenching and electron paramagnetic spectroscopy.Finally,the mechanism of living radical generation in the CuFe_(2)O_(4)/K_(2)S_(2)O_(8) reaction system was given.
作者
周自成
徐大伟
姜澳
刘苏纬
赵帅
范小振
ZHOU Zi-cheng;XU Da-wei;JIANG Ao;LIU Su-wei;ZHAO Shuai;FAN Xiao-zhen(School of Chemistry and Chemical Engineering,Cangzhou Normal University,Cangzhou 061001,China;Hebei Zhencang Environmental Protection Technology Co.,Ltd,Cangzhou 061001,China)
出处
《化学研究与应用》
北大核心
2025年第8期2302-2308,共7页
Chemical Research and Application
基金
河北省2021年度引进留学人员资助项目(C20210302)资助
2022年度沧州市自然科学基金项目(221001013D)资助
2021年沧州师范学院校基金重点项目(XNJJLZD2021002)资助
沧州师范学院2023年度科研创新团队(cxtd122301)支持资助。
作者简介
通讯作者:范小振(1966-),男,教授,主要从事环境分析化学研究。E-mail:fxx0315@126.com。
