基于半导体材料的光催化降解全氟辛酸研究进展

doi:10.19741/j.issn.1673-4831.2021.0406

摘要/Abstract

摘要： 近年来，环境中广泛存在的持久性有机污染物——全氟辛酸（PFOA）引起了社会与学界广泛关注，对于PFOA的高效处置一直是研究热点和难点。相较于其他方法，异相光催化降解技术具有绿色高效、易于推广、降解彻底等优点，是具有应用前景的PFOA有效处理手段。异相光催化技术的关键是构筑能够高效利用光能的半导体催化材料。目前常用的半导体催化材料存在光生电子-空穴对复合速率快等缺陷，可以通过金属离子掺杂、贵金属沉积、碳材料复合、构建异质结和改变微观形貌等方式进行改性增效。结合当前国内外研究现状，介绍了常用的PFOA处理技术，总结了基于半导体材料的异相光催化氧化降解机制，综述了半导体材料光催化降解PFOA的研究进展，并结合不同半导体催化材料的优缺点、效能，讨论了目前异相光催化降解PFOA技术存在的不足之处。该研究可为今后光催化降解PFOA技术的进一步发展和应用提供借鉴和理论支持。

关键词: 光催化技术, 全氟辛酸, 机制, 半导体材料

Abstract: In recent years, a persistent organic pollutant, namely perfluorooctanoic acid (PFOA), that widely exists in the environment, has attracted extensive attention. The efficient treatment of PFOA has always been a research hotspot and challenging subject. Due to its eco-friendly, high-efficiency, low-cost and completely degradable features, photocatalytic degradation technology has become an effective method for promising application in the treatment of PFOA, as compared with other methods. The key point of photocatalytic technology is to construct photocatalytic semiconductor materials that can make efficient use of optical energy, while semiconductor materials are often limited by fast recombination rate of photogenerated electron-hole pairs. At present, researchers often modify semiconductor materials by means of metal ion doping, precious metal deposition, carbon material composite, construction of heterojunction, variation of microscopic morphology and so on to improve photocatalytic degradation capability. According to the current research status at home and abroad, this paper introduces the advantages of photocatalytic technology in the degradation of PFOA, summarizes the photocatalytic oxidation degradation mechanism and the research progress of photocatalytic treatment of PFOA by semiconductor materials. Combined with the advantages, disadvantages and efficiency comparison of different semiconductor catalytic materials, the shortcomings of photocatalytic treatment of PFOA are discussed. This paper provides reference and theoretical support for further development and application of photocatalytic technology in the degradation of PFOA.

Key words: photocatalytic technology, perfluorooctanoic acid, mechanism, semiconductor material

中图分类号:

X131.3
TB33

徐斌, 李菊颖, 刘剑辉, 付超, 张栩涵, 何斐. 基于半导体材料的光催化降解全氟辛酸研究进展[J]. 生态与农村环境学报, 2022, 38(3): 273-280.

XU Bin, LI Ju-ying, LIU Jian-hui, FU Chao, ZHANG Xu-han, HE Fei. Research Progress of Photocatalytic Degradation of PFOA Based on Semiconductor Materials[J]. Journal of Ecology and Rural Environment, 2022, 38(3): 273-280.

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