Autocatalytic formed bamboo-like N-doped carbon nanotubes encapsulated with Co nanoparticles as highly efficient catalyst for activation of peroxymonosulfate toward degradation of tetracycline

文献类型： 外文期刊

第一作者： Lu, Yingying

作者： Lu, Yingying;Huang, Chenxi;Chen, Rui;Chen, Yiping;Lu, Yingying;Huang, Chenxi;Chen, Rui;Chen, Yiping;Wang, Chengming;Chen, Yiping;Chen, Yiping;Li, Yong-Ke

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关键词： Electron transfer; Non-radical; Singlet oxygen; Inhibit Co leaching; Wastewater

期刊名称：REACTIVE & FUNCTIONAL POLYMERS （ 影响因子：5.1； 五年影响因子：4.3 ）

ISSN： 1381-5148

年卷期： 2023 年 183 卷

页码：

收录情况： SCI

摘要： Co-based catalysts activated peroxymonosulfate (PMS) for organic pollutants degradation has been extensively studied. Co dissolution of Co-based catalysts would result in secondary environmental contamination. Co autocatalysis the formation of bamboo-like N-doped carbon nanotubes to confine Co nanoparticles (Co NPs). Herein, the N-doped carbon nanotubes encapsulated Co (Co@NCTs) were successfully synthesized through a one-step high-temperature calcination method at different temperatures. Co@NCTs-800 exhibited excellent catalytic performance, the degradation efficiency of tetracycline (TC) could reach 94.5% with only 0.05 g/L catalyst in activating PMS. In addition, the encapsulation of carbon nanotubes inhibits the dissolution of Co, the Co2+ dissolution was 0.0594 mg/L in 40 min in the system of Co@NCTs-800/PMS. Free radical quenching tests, electron paramagnetic resonance, and electrochemical measurements revealed that the non-radical route was dominated by tetracycline degradation, with singlet oxygen (1O2) and electron transfer as the principal active species. The N-doped carbon nanotubes can effectively encapsulate Co, which not only reduces the leaching of Co but also play a synergistic role with Co in degrading organic pollutants. In addition to this, the degradation mechanism and pathways of TC were further investigated. The Co@NCTs-800/PMS system was also able to successfully decompose a variety of organic contaminants, demonstrating that it has real application potential in wastewater.

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