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光催化技术可以利用太阳能将水转化为氢能以及降解环境中的有机污染物,具有成本低廉、环境友好等特点,是解决全球能源危机和当前环境污染的重要途径之一。Cu2O禁带宽度介于2.0—2.2eV之间,是一种具有可见光响应的p型氧化物半导体,在光催化领域具有良好的应用前景,逐渐成为国内外研究的热点。本文介绍了Cu2O晶体特殊的网络结构和能带结构特点以及对其进行的掺杂和复合等改性研究,概述了Cu2O及其改性材料在光解水制氢及光降解有机污染物方面的研究进展,阐明提高Cu2O光催化效率的关键是抑制光生载流子的复合和Cu2O的光腐蚀,指出基于Cu2O的光催化反应中存在的问题,并对未来的研究方向做出了展望。
Photocatalytic technology can utilize solar energy to convert water into hydrogen energy and degrade organic pollutants in the environment, which has the characteristics of low cost and environment friendliness, and is one of the important ways to solve the global energy crisis and current environmental pollution. As a kind of p-type oxide semiconductor with visible light response, Cu2O has a good application prospect in the field of photocatalysis and has become a hot research field both at home and abroad. In this paper, the special network structure and energy band structure characteristics of Cu2O crystal as well as its modification of doping and compounding are introduced. The effects of Cu2O and its modified materials on hydrogen production by photolysis and photodegradation of organic pollutants The key to improve the photocatalytic efficiency of Cu2O is to suppress the recombination of photocarriers and the photocouration of Cu2O. The problems in the photocatalytic reaction based on Cu2O are pointed out, and the future research directions are also put forward.