Carbonized poly(dopamine)@Co-0 composites for the high-efficient removal of sulfamethoxazole: Role of direct electron-transfer and adsorption

文献类型： 外文期刊

第一作者： Lin, Jiawei

作者： Lin, Jiawei;Li, Lichun;Ma, Lisha;Zhao, Cheng;Wei, Linting;Zheng, Guangming;Liu, Shugui;Shan, Qi;Yin, Yi;Hu, Yongyou;Zhao, Haoyi

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关键词： Persulfate oxidation; Cobalt; Nitrogen-doped carbon material; Poly(dopamine); Sulfamethoxazole

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：16.744； 五年影响因子：14.61 ）

ISSN： 1385-8947

年卷期： 2022 年 445 卷

页码：

收录情况： SCI

摘要： It is great challenge to design a simple approach to prepare Co-based N-doped carbon catalysts with high activity and minimum impact to the environment. Here, a novel carbonized poly(dopamine)-coated cobalt nanocomposite (CPDA@Co0) was synthesized via a simple and "zero-organic solvents" approach and employed to activate persulfate (PS) for sulfamethoxazole (SMX) degradation. The CPDA@Co0/PS system exhibited outstanding performance on SMX degradation over a wide pH range (3.0-8.5), and facilitated by acidic conditions and Cl-. For fair comparison, CPDA@Co0 under slightly acidic pH exhibited a much higher rate constant (0.121 min-1) than many reported catalysts. A direct electron-transfer pathway played a leading role in the oxidation, while adsorption of SMX on the surface of CPDA@Co0 might be the determining step. Since the synergistic effect between adsorption and catalysis, 10 mg/L SMX could be completely removed within 25 min, which provided a new strategy for removing organic pollutants from wastewater. Besides, the special core-shell structure could efficiently protect inner Co0 core from leaching. CPDA@Co0 could be easily separated via a permanent magnet and reused at least 5 times. This study might inspire others to develop effective and green PS activation processes for application in SMX treatment.

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