双酚A
催化作用
纳米复合材料
二氧化钛
降级(电信)
光催化
化学
化学工程
无机化学
材料科学
纳米技术
有机化学
冶金
电信
工程类
计算机科学
环氧树脂
作者
Xingxing Qiao,Yu–Hang Xu,XiangJi Liu,Sai–Le Chen,Zhóng Yuan Zhou,Yafeng Li,Jian Lü
标识
DOI:10.1016/j.jes.2023.06.026
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–TiO2/SCH) are 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–TiO2/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 was significantly higher than that of the pristine schwertmannite (ca. 74.5%) or N–TiO2 (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 (1O2). Moreover, the possible catalytic mechanisms and reaction pathway of BPA degradation are systematically investigated based on analytical and photoelectrochemical methods. 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 remediation.
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