单线态氧
催化作用
化学
选择性
光化学
石墨烯
氧气
降级(电信)
协同催化
氮气
浸出(土壤学)
双酚A
无机化学
纳米技术
材料科学
有机化学
环氧树脂
土壤水分
土壤科学
电信
计算机科学
环境科学
作者
Hanqing Zhao,Junsheng Song,Peili Lu,Yang Mu
标识
DOI:10.1016/j.cej.2022.141045
摘要
Singlet oxygen (1O2) is an excellent active species generated in advanced oxidation processes (AOPs) that exhibits high selectivity, long life and wide pH tolerance. Therefore, catalysts for highly efficient and selective generation of 1O2 in AOPs would be highly desirable. This study developed a single atom Co-anchored nitrogen‑doped graphene (CoSAC-NG), which showed excellent catalytic performance for peroxymonosulfate (PMS) activation and bisphenol A degradation, with the pseudofirst-order reaction rate constant improved from 8.13 × 10−4 min−1 without catalyst to 4.42 × 10−2 min−1 with 5 mg L−1 CoSAC-NG. Mechanism studies indicated that CoSAC-NG selectively enhanced 1O2 generation, which was the dominant active specie for pollutant degradation. Moreover, the CoSAC-NG/PMS system effectively reduced the acute toxicity of pollutant, and CoSAC-NG exhibited remarkable cycling stability and negligible leaching. This study develops a new catalyst with high selectivity for 1O2 generation and provides a reference for application of single atom catalyst in PMS-based AOPs.
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