Abstract:

Photocatalysis technology can continuously use clean solar energy to achieve effective degradation of the endocrine disruptor, bisphenol A (BPA), which stands out among many degradation methods. Graphite-like carbon nitride (g-C₃N₄), as a classic semiconductor material, has the advantages of simple synthesis, good thermal and chemical stability, economic and pollution-free, and is widely used in the field of photocatalytic degradation. However, due to the high recombination rate of photogenerated electron hole pairs, weak visible light absorption range and low oxidation potential of bulk g-C₃N₄, the performance of BPA degradation by bulk g-C₃N₄ is not high. In order to improve the degradation ability of g-C₃N₄ to BPA, a variety of modification methods are used to modify g-C₃N₄. This paper mainly reviewed the modification of g-C₃N₄ by means of element doping, morphology control, heterojunction construction and copolymerization. From the perspective of electronic structure, band structure and optical properties, the degradation performance and mechanism of modified g-C₃N₄ for BPA were summarized in detail. Secondly, the common degradation pathways and safety analysis of BPA were also summarized. Finally, effective selectivity for the degradation of BPA by modified g-C₃N₄ was prospected.

Key words: photocatalysis, degradation, bisphenol A, g-C₃N₄, modification, mechanism, degradation pathway

摘要：

光催化技术可源源不断地利用清洁的太阳能来实现对内分泌干扰物双酚A（BPA）的有效降解，从而在众多降解方法中脱颖而出。类石墨相氮化碳（g-C₃N₄）作为经典的半导体材料，具有合成简单、热稳定性和化学稳定性好、经济无污染等优点，广泛应用于光催化降解领域。但是本体g-C₃N₄由于高的光生电子-空穴对复合率、较窄的可见光吸收范围以及较低的氧化电位，使得其降解BPA的性能大大降低。为了提高g-C₃N₄对BPA的降解能力，研究者采用多种改性方法对g-C₃N₄进行改性。本文主要综述了元素掺杂、形貌调控、异质结的构建以及共聚等手段对g-C₃N₄进行改性的进展，从电子结构、能带结构和光学性能等角度出发，详细总结了改性后g-C₃N₄对BPA的降解性能以及降解机理；其次，总结了BPA常见的降解路径及安全性分析；最后针对改性g-C₃N₄降解BPA的有效选择性进行了展望。

关键词: 光催化, 降解, 双酚A, 类石墨相氮化碳, 改性, 机理, 降解路径