催化作用
钴
碳纳米管
电子转移
降级(电信)
磺胺美拉嗪
化学
碳纤维
反应速率常数
化学工程
材料科学
光化学
无机化学
纳米技术
动力学
有机化学
工程类
物理
复合材料
复合数
电信
抗生素
量子力学
生物化学
磺胺嘧啶
计算机科学
作者
Meng Xie,Mingya Yao,Shiyong Zhang,Lingshuai Kong,Lei Zhao,Jinhua Zhan,Ru-Song Zhao
标识
DOI:10.1016/j.seppur.2022.122398
摘要
Carbon-based single-atom cobalt catalysts exhibit high catalytic activity for the removal of novel pollutants in advanced oxidation processes. Here, atomically dispersed Co species with five-coordinated nitrogen atoms on carbon nanotubes (CNT) catalyst (Co-N5/CNT) was successfully fabricated via a low-temperature solvothermal reaction. The obtained Co-N5/CNT catalyst exhibited superior catalytic performance for PMS activation for sulfamerazine degradation. Its apparent rate constant kobs was 1.6 times higher than that of the Co-N4/CNT catalyst with four-coordinated nitrogen atoms prepared by the same method. Electron transfer non-radical mechanism was the main pathway for Co-N5/CNT to activate PMS. Higher single-atom cobalt metal loading (1.39 wt% vs 1.08 wt% in Co-N4/CNT) and significantly enhanced electron transfer ability (0.82 e vs 0.77 e in Co-N4/CNT) were the key factors for its superior catalytic performance. This work demonstrates a novel carbon-based single-atom cobalt catalyst for the removal of novel antibiotic contaminants by activating PMS in environmental catalysis applications.
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