Abstract

In this paper, the high-performance photocatalytic copper oxide and bismuth oxychloride composite material is prepared with a simple hydrolysis method and is studied by various characterization methods. The results show that the moderately loaded copper oxide significantly enhances the degradation performance, visible light response ability, and interface charge transfer ability of bismuth oxychloride semiconductors, and the recombination of electron-hole pairs is obviously inhibited. Especially, when the content of added copper oxide is about 0.04 mmol, the composite material has a saturated adsorption rate of 53.07% for ciprofloxacin. Under the irradiation of visible light for 60 minutes, the removal rate of composite material for Ciprofloxacin reaches 93.15%, which is that of pure bismuth oxychloride 6.2 times. The photocatalytic effect is improved dramatically. After five times of recycling, the material presents favorable stability and outstanding photocatalytic activity. The possible photocatalytic mechanism is discussed that Superoxide radical is the leading radical group playing the significant role in the press of photocatalytic degradation of ciprofloxacin.

摘要

本文采用简单的水解方法制备了高性能光催化氧化铜和氯氧化铋复合材料，并通过多种表征方法进行了研究。结果表明，适度负载的氧化铜显着增强了氯氧化铋半导体的降解性能、可见光响应能力和界面电荷转移能力，并且明显抑制了电子-空穴对的复合。特别是当氧化铜的添加量为0.04 mmol左右时，复合材料对环丙沙星的饱和吸附率为53.07%。在可见光照射60分钟下，复合材料对环丙沙星的去除率达到93.15%，是纯氯氧化铋的6.2倍。光催化效果显着提高。经过五次循环利用，该材料表现出良好的稳定性和出色的光催化活性。讨论了可能的光催化机理，超氧自由基是主要的自由基基团，在光催化降解环丙沙星中起重要作用。