Fe-N-C heterogeneous Fenton-like catalyst for the degradation of tetracycline:Fe-N coordination and mechanism studies  

作　　者：Weichen Zhu Wei Zuo Pu Wang Wei Zhan Jun Zhang Lipin Li Yu Tian Hong Qi Rui Huang 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment(SKLUWRE),School of Environment,Harbin Institute of Technology,Harbin 150090,China [2]Guangdong Yuehai Water Investment Co.,Ltd.,Shenzhen 518021,China [3]National Engineering Research Center of Urban Water Resources Co.,Ltd.,Harbin Institute of Technology,Harbin 150090,China

出　　处：《Chinese Chemical Letters》2024年第9期309-314,共6页中国化学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2019YFC1906401-03);the Harbin Institute of Technology National Engineering Research Center of Urban Water Resources Co.,Ltd.(No.GJS-YFLX202207280002)。

摘　　要：Fe-N-C materials have received increasing attention,due to its distinctive catalytic activity.However,the Fe-N coordination number dependence of catalytic ability and mechanism for H_(2)O_(2)activation remain elusive.Herein,a series of Fe-N-C heterogeneous Fenton-like catalysts with different Fe-N coordination number were prepared for tetracycline degradation.The results demonstrated that samples with Fe-N4 structure exhibited high activity.The excellent performance was mainly ascribed to the high adsorption capacity and the formation of superoxide radicals(•O_(2)^(−))catalyzed by Fe linked to pyridinic nitrogen.The intermediates and degradation pathways of tetracycline degradation by Fe-N-C/H_(2)O_(2)system were analyzed by liquid chromatography coupled to tandem mass spectrometry(LC-MS/MS).Furthermore,we applied our Fe-N-C catalysts to treat simulated pharmaceutical wastewater with high tetracycline degradation capacity despite high concentrations of organic matter such as oxalic acid and various ionic interferences.Our work reveals the dependence of the activation H_(2)O_(2)on the Fe-N coordination environment and the degradation mechanism of these catalysts.It provides insights into the prospects for tuning the catalyst in practical applications.

关 键 词：H_(2)O_(2)activation Advanced oxidation process Superoxide radicals Degradation pathways EXAFS 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]