Study on the performance and mechanism of photocatalytic reduction of Cr(VI) through boron-doped g-C3N4 under visible light

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-03-08 DOI:10.1016/j.optmat.2025.116889

Yuhang Gao, Lijun Nie, Na Zheng, Kunkun Xue, Wangchao Su, Yueyu Ma, Xiaobei Han, Lirong Ren, Jianhui Shi

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引用次数: 0

Abstract

Hexavalent chromium (Cr(VI)) is an extremely toxic and soluble substance that poses a significant threat to human and environmental health. Photocatalysis is an efficient and environmentally friendly technique of reducing Cr(VI) in water. In this study, B-doped g-C₃N₄ (BCN) materials were synthesized by one-pot thermal polycondensation method. The experimental results indicated that under the visible light irradiation of citric acid solution, the photoreduction rate constant of BCN 1:0.15 for Cr(VI) reached 4.1421 h⁻¹, which was 7.15 times higher than that of g-C₃N₄, and 98.8 % of Cr(VI) could be degraded within 30 min. The electronic energy band structure and photocatalytic properties of BCN can be effectively tuned by adjusting the doping amount of boric acid. The B atoms were doped into the g-C₃N₄ lattice, replacing carbon atoms, while the BCN maintained the essential structure of g-C₃N₄. Compared with g-C₃N₄, the modified BCN exhibited a broader visible light response range and enhanced electron-hole separation capability. The stability and recyclability of the BCN photocatalysts were also evaluated. The results indicate BCN 1:0.15 maintained a high activity after five cycling experiments. In addition, a possible photocatalytic reduction mechanism was proposed based on free radical trapping experiments. This study provides insights and considerations for efficient photocatalytic reduction of Cr(VI) in wastewater.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.