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当前位置：化学与化工研究 > 2026年 6卷 (1)期

Open Access Article

Journal of Chemistry and Chemical Research. 2026; 6: (1) ; 1-7 ; DOI: 10.12208/j.jccr.20260001.

Preparation and performance study of g-C₃N₄/BiVO₄ composite photocatalytic materials
g-C₃N₄/BiVO₄复合光催化材料的制备及性能研究

作者： 郭怡琳, 林双龙, 刘磊, 周娟, 次立杰, 周二鹏, 齐跃红 *

石家庄学院化工学院，石家庄市绿色装饰板材技术创新中心，环境催化及清洁技术研究创新中心河北石家庄

*通讯作者：齐跃红,单位：石家庄学院化工学院，石家庄市绿色装饰板材技术创新中心，环境催化及清洁技术研究创新中心河北石家庄；

河北省高等学校科学研究项目（项目编号：ZC2025049）

发布时间: 2026-06-13 总浏览量: 45

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摘要

选用水热法制备不同g-C₃N₄修饰量的g-C₃N₄/BiVO₄复合光催化剂，借助扫描电子显微镜（SEM）对催化剂微观形貌进行表征；以亚甲基蓝为模拟有机污染物，在特定可见光光源条件下，通过光催化降解实验测定催化剂的光催化活性，并通过循环降解实验评价催化剂稳定性。由实验结果可知：g-C₃N₄是片状的，可均匀的修饰在小颗粒状的BiVO₄表面；光催化活性测试表明，当g-C₃N₄修饰量为20 %时，催化剂对亚甲基蓝的降解效果最好，降解率可达82 %。自由基淬灭实验证实，光生空穴在光催化降解亚甲基蓝的过程中发挥主导作用。5次循环降解实验后，g-C₃N₄/BiVO₄对亚甲基蓝降解率仍保持36.01 %，除去实验测量误差与催化剂流失因素，证明该复合催化剂具备良好的循环稳定性。本研究制备的g-C₃N₄/BiVO₄复合材料在有机废水处理领域具备良好应用潜力，可为有机污染物的光催化降解研究提供实验依据与理论参考。

关键词： g-C₃N₄/BiVO₄；水热法；复合光催化剂；亚甲基蓝

Abstract

g-C₃N₄/BiVO₄ composite photocatalysts with different g-C₃N₄ modification amounts were prepared via hydrothermal method. The micromorphology of the as-prepared samples was characterized by scanning electron microscope (SEM Taking methylene blue as the target pollutant, the composites were tested for photocatalytic performance under visible light. The reaction mechanism was investigated by radical quenching experiments, and catalyst stability was assessed via cyclic tests. Characterization shows that sheet-like g-C₃N₄ is uniformly dispersed on granular BiVO₄ surface.The 20% g-C₃N₄-modified g-C₃N₄/BiVO₄ composite achieves the highest methylene blue degradation efficiency of 82%. Free radical quenching experiments verify that photogenerated holes (h⁺) play a dominant role in the photocatalytic degradation process of methylene blue. After 5 cycles of degradation experiments, the degradation rate of methylene blue by the catalyst still remains 36.01%. Excluding experimental measurement errors and catalyst loss, it proves that the composite photocatalyst has favorable cycling stability. The prepared g-C₃N₄/BiVO₄ composite exhibits good application potential in organic wastewater treatment, and provides experimental and theoretical references for photocatalytic degradation of organic pollutants.

Key words： g-C₃N₄/BiVO₄; Hydrothermal method; Composite photocatalyst; Methylene blue

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引用本文

郭怡琳, 林双龙, 刘磊, 周娟, 次立杰, 周二鹏, 齐跃红, g-C₃N₄/BiVO₄复合光催化材料的制备及性能研究[J]. 化学与化工研究, 2026; 6: (1) : 1-7.

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