摘要
以钴铁水滑石为基础,络合木质素通过限域热转化法制备了具有不同钴铁物质的量比的催化剂来活化过硫酸盐,从而实现对四环素(TC)的高效降解.通过X射线衍射仪(XRD)、傅里叶变换红外光谱(FTIR)、拉曼光谱(Raman)、扫描电子显微镜(SEM)等表征方法研究了复合催化剂的结构、形貌和降解性能,并对其内在反应机理进行了分析.实验结果表明,Co_(2)Fe_(1)-LDOs@C/PMS体系可以在60 min内降解96.7%的四环素.经过4次循环实验,其降解效率依然能够保持在较高水平.淬灭实验结果证实在Co_(2)Fe_(1)-LDOs@C/PMS体系中的主要活性成分是硫酸根自由基和单线态氧.该研究为开发降解抗生素残留的高效催化剂提供了一个思路.
The layered double hydroxide catalysts with different cobalt-iron molar ratios were prepared to activate PMS for the efficient degradation of tetracycline by intercalated of lignin through a restricted domain thermal transformation method.The structure,morphology and degradation performance of the composite catalysts were analyzed by XRD,FTIR,Raman,SEM and other characterization methods,and the intrinsic reaction mechanism was briefly analyzed.The experimental results show that Co_(2)Fe_(1)-LDOs@C/PMS system can degrade 96.7%of tetracycline within 60 min.Moreover,the degradation efficiency can still maintain at a high level after four cycles of experiments,and the quenching experimental results confirm that the main active components in the tetracycline degradation process are sulfate radicals and singlet oxygen under the Co_(2)Fe_(1)-LDOs@C/PMS system.This study provides an idea for the development of efficient catalysts for the catalytic degradation of organic pollutants by peroxymonosulfate.
作者
郎集会
梁慧聪
吴思
许冰燕
陈诺
孙可心
LANG Ji-hui;LIANG Hui-cong;WU Si;XU Bing-yan;CHEN Nuo;SUN Ke-xin(College of Physics,Jilin Normal University,Siping 136000,China)
出处
《吉林师范大学学报（自然科学版）》
2023年第2期12-17,共6页
Journal of Jilin Normal University:Natural Science Edition
基金
国家自然科学基金项目(22078124,21878119)
吉林省科技发展计划项目(20210203014SF,20230508040RC)。
关键词
钴铁金属氧化物
碳材料
高级氧化法
四环素
降解
CoFe-LDOs
carbon materials
advanced oxidation process
tetracycline
degradation
作者简介
第一作者:郎集会(1980-),女,吉林省吉林市人,教授,博士,硕士生导师.研究方向:功能材料掺杂改性及其应用.
