Nitrogen-doped titanium dioxide/schwertmannite nanocomposites as heterogeneous photo-Fenton catalysts with enhanced efficiency for the degradation of bisphenol A  

作　　者：Xing-Xing Qiao Yu-Hang Xu Xiang-Ji Liu Sai-Le Chen Zhou Zhong Ya-Feng Li Jian Lü 

机构地区：[1]Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation,College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]State Key Laboratory of Photocatalysis on Energy and Environment,Fuzhou University,Fuzhou 350116,China

出　　处：《Journal of Environmental Sciences》2024年第9期1-11,共11页环境科学学报（英文版）

基　　金：supported by the Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment,Fuzhou University(No.SKLPEE-202008);the Special Fund for Scientific and Technological Innovation of Fujian Agriculture and Forestry University(No.CXZX2019073G)。

摘　　要：Potential health risks related to environmental endocrine disruptors(EEDs)have aroused research hotspots at the forefront of water treatment technologies.Herein,nitrogen-doped titanium dioxide/schwertmannite nanocomposites(N-TiO_(2)/SCH)have been successfully developed as heterogeneous catalysts for the degradation of typical EEDs via photo-Fenton processes.Due to the sustainable Fe(Ⅲ)/Fe(Ⅱ)conversion induced by photoelectrons,as-prepared N-TiO_(2)/SCH nanocomposites exhibit much enhanced efficiency for the degradation of bisphenol A(BPA;ca.100% within 60 min under visible irradiation)in a wide pH range of 3.0-7.8,which is significantly higher than that of the pristine schwertmannite(ca.74.5%)or N-TiO_(2)(ca.10.8%).In this photo-Fenton system,the efficient degradation of BPA is mainly attributed to the oxidation by hydroxyl radical(·OH)and singlet oxygen(^(1)O_(2)).Moreover,the possible catalytic mechanisms and reaction pathway of BPA degradation are systematically investigated based on analytical and photoelectrochemical analyses.This work not only provides a feasible means for the development of novel heterogeneous photo-Fenton catalysts,but also lays a theoretical foundation for the potential application of mineral-based materials in wastewater treatment.

关 键 词：Titanium dioxide SCHWERTMANNITE Fenton reaction Environmental endocrine disruptors PHOTOCATALYSIS 

分 类 号：X703[环境科学与工程—环境工程]