In-situ supramolecular self-assembly strategy to fabricate carbon-doped g-C3N4 microtubes: Efficient photocatalytic removal of antibiotics and bacterial inactivation

文献类型： 外文期刊

第一作者： Lei, Hua

作者： Lei, Hua;Hu, Ruibin;Yang, Hua;Lei, Hua;Lin, Jianhan;Bian, Changhao;Guo, Fengyu;Dong, Xiaoping;Guo, Fengyu;Xiao, Xingning;Yang, Hua;Wang, Wen

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关键词： Supramolecular self-assembly strategy; Visible light catalysis; Tetracycline hydrochloride degradation; Bacterial inactivation; Supramolecular self-assembly strategy; Carbon-dopped g-C3N4; Visible light catalysis; Tetracycline hydrochloride degradation; Bacterial inactivation

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 3 期

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收录情况： SCI

摘要： The poor utilization of visible light and the rapid recombination of charge carriers in graphitic carbon nitride (g-C3N4) constrain its application for photocatalytic degradation of antibiotics and sterilization. In this study, a hydrogen bond-induced supramolecular self-assembly strategy was developed to fabricate carbon-doped g-C3N4 microtubes (CTCN) through the pyrolysis method. Specifically, 2,4,6-triaminopyrimidine as a dopant to replace a portion of melamine and co-assemble with cyanuric acid. Compared to bulk g-C3N4, CTCN displayed advantageous visible light absorption capability and enhanced charge carrier separation and transfer efficiency. CTCN demonstrated superior photocatalytic degradation of tetracycline hydrochloride (TC), achieving an efficiency of 99.2 % in 18 min. It achieved reaction kinetics (similar to 0.261 min(-1)) was up to 26.6 times higher than that of bulk g-C3N4. Additionally, CTCN exhibited almost complete photocatalytic antibacterial efficacy, inactivating similar to 100 % of bacteria (including Escherichia coli, Salmonella typhimurium, and Pseudomonas aeruginosa) within 120 min. The mechanism underlying the photocatalytic degradation of TC and the possible degradation pathways were proposed, where the superoxide radical was considered to exert a predominant function. Toxicity assessment of TC and its intermediates revealed that the degradation of TC was a gradual detoxification course. This study presents a novel self-assembly strategy for the design and fabrication of highly active and durable visible-light-responsive photocatalysts, which can effectively degrade antibiotics and kill bacteria.

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