二硫化钼基异质结催化剂可见光降解有机污染物的研究进展

Research progress of the visible light degradation of organic pollutants over molybdenum disulfide-based heterojunction catalysts

光催化是近年来迅速发展的、利用太阳能进行能源转化和环境净化的新技术。二硫化钼具有层状结构,是过渡金属硫族化合物的代表,因具有带隙窄、活性位点多、比表面积大的优点而成为良好的助催化剂,广泛应用于光催化降解有机污染物。介绍了国内外不同类型二硫化钼基异质结催化剂(金属氧化物、铋基材料、银基材料、金属硫化物、石墨氮化碳、氧化石墨烯)的研究现状,对比了二硫化钼基异质结催化剂的制备方式及光催化降解有机污染物的效果,并简述其降解机理。结果表明,二硫化钼的耦合作用可以有效提高基质材料的光催化活性。今后研究将继续围绕开发高效、高稳定性和可回收的二硫化钼基异质结催化剂来展开。

Photocatalysis is a new technology developed rapidly in recent years,which uses solar energy for energy conversion and environmental purification.Molybdenum disulfide has a layered structure and is the representative of transition metal chalcogenides.It has become a good catalyst because of its narrow band gap,many active sites and large specific surface area,and is widely used in the photocatalytic degradation of organic pollutants.The domestic and international research status of different types of molybdenum disulfide-based heterojunction catalysts(metal oxides,bismuth-based materials,silver-based materials,metal sulfides,graphite carbon nitride,graphene oxide)were introduced.The preparation methods and photocatalytic degradation effects of organic pollutants of molybdenum disulfide-based heterojunction catalysts were compared,and their degradation mechanisms were briefly described.The results showed that the coupling effect of molybdenum disulfide could effectively improve the photocatalytic activity of matrix materials.Future research should continue to focus on the development of high efficient,stable and recyclable molybdenum disulfide-based heterojunction catalysts.