Synthesis of BiVO4/g-C3N4 heterojunction photocatalyst for enhanced doxycycline degradation under LED light illumination

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-25 DOI:10.1016/j.mseb.2025.118804

Tien Van Huynh , Bao Gia Tran , Hiep Quang Ha , Vinh Huu Nguyen , Que-Minh T. Doan , Oanh T.K. Nguyen

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Abstract

BiVO₄/g-C₃N₄ heterojunction photocatalysts were synthesized via a combustion method for efficient doxycycline (DOX) degradation under visible LED light. The 5BiVO₄/g-C₃N₄ composite showed the best performance, removing 78 % of DOX in 180 min at 0.4 g/L. BiVO₄ incorporation enhanced the properties of g-C₃N₄ by increasing surface area (10 to 70 m²/g) and narrowing the band gap (∼2.7 eV), improving visible light absorption. Electron and superoxide radicals were identified as key reactive species. The composite maintained over 66 % of its initial activity after four cycles, with minimal structural degradation. QSAR analysis also assessed the toxicity of DOX and its intermediates, offering insight into environmental risks. These findings suggest BiVO₄/g-C₃N₄ is a promising and stable photocatalyst for removing persistent pollutants from water.

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LED光照下BiVO4/g-C3N4异质结光催化剂的合成及对强力霉素降解的影响

采用燃烧法合成了BiVO4/g-C3N4异质结光催化剂，在可见光下高效降解多西环素（DOX）。5BiVO4/g- c3n4复合材料性能最好，在0.4 g/L的浓度下，180 min内可去除78%的DOX。BiVO4的掺入通过增加g- c3n4的表面积（10 ~ 70 m2/g）和缩小带隙（~ 2.7 eV），提高可见光吸收，增强了g- c3n4的性能。电子自由基和超氧自由基被确定为关键的活性物质。经过四个循环后，复合材料保持了超过66%的初始活性，结构降解最小。QSAR分析还评估了DOX及其中间体的毒性，从而深入了解环境风险。这些发现表明BiVO4/g-C3N4是一种有前途的稳定的光催化剂，用于去除水中的持久性污染物。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.