Dynamic gas template method derived thin-layer graphitic carbon nitride nanosheets for efficient 2,4-dichlorophenoxyacetic acid photodegradation and mechanism insight

文献类型： 外文期刊

第一作者： Zhang, Bingjie

作者： Zhang, Bingjie;Zhu, Jianhui;Yu, Lina;Wang, Jianli;Ji, Jiawen;Liu, Desheng;Ma, Yongqiang

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关键词： Graphitic carbon nitride; Nanosheets; Gas template; Photocatalytic degradation; 2,4-Dichlorophenoxyacetic acid

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0013-9351

年卷期： 2025 年 283 卷

页码：

收录情况： SCI

摘要： The extensive application of 2,4-dichlorophenoxyacetic acid (2,4-D, C8H6Cl2O3) as a herbicide has resulted in the significant environmental contamination. This pervasive pollution poses serious health risks to humans. Semiconductor photocatalytic technology represents a highly effective approach to addressing urgent environmental crisis. Herein, thin-layer g-C3N4 nanosheets were synthesized using NH4Cl as a dynamic gas template. Among all synthesized materials, the thin-layer g-C3N4 (2.5N-MCN) exhibited a degradation rate constant (k) for 2,4-D that was 3.05 times higher than that of pristine g-C3N4 (MCN). 2.5N-MCN exhibits continuous lamellar nanostructures, the highest specific surface area (SBET), and superior electrochemical properties among all samples. Moreover, the hydroxyl radical (& sdot;OH) was identified as the predominant reactive species in the photocatalytic degradation process. Subsequently, the degradation pathway of 2,4-D was deduced from the identified intermediates. And the process of photocatalytic degradation 2,4-D proceeded without significant elevated in toxicity levels by the TEST software. Then, the pH and fulvic acid influence experiment were also studied. Nevertheless, the photocatalytic degradation efficiency of 2.5N-MCN toward 2,4-D exhibited a moderate decline after four cycles. This research provided insights into the improving the photocatalytic efficiency of organic pollutant degradation through efficient solar conversion materials.

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