Semiconductor photocatalytic technology has been proved as an effective way to solve the problems of both environmental pollution and energy shortage.It can be applied for the degradation, transformation and mineralization of pollutants in the environment, and for the conversion of solar energy as well.Graphite phase carbon nitride (g-C3N4) and bismuth based composite materials have become the hot research topic because of their excellent photocatalytic performance.This paper reviews the preparation methods of g-C3N4 and its composites with different bismuth compounds.We also reviews the recent advances of the application of g-C3N4 and Bi composites in the environmental purification, including the elimination of pollutants in water, the light induced bacterial inactivation, and the photoinduced hydrolysis for hydrogen production.Taking the elimination of organic contaminants in water as an example, this paper elaborate detailedly their mechanisms of photocatalytic degradation.Finally, we prospect the new development and application potential of the g-C3N4 and Bi based composite photocatalytic materials in the environmental field.%半导体光催化技术可应用于环境中污染物的降解、转化和矿化以及太阳能的转换,是解决环境污染和能源短缺问题的一条有效途径.石墨相氮化碳(g-C3N4)与Bi系化合物复合材料因具有优异的光催化性能成为新型光催化材料的研究热点.本文论述了目前g-C3 N4的主要制备方法,g-C3N4与Bi系复合材料的种类及其制备过程;同时围绕g-C3 N4和Bi系复合催化材料在环境净化中的应用,包括对水体中污染物的降解及去除、光致细菌失活和光致水解产氢等,综述了国内外近年来的重要研究进展;以去除水环境中有机污染物为例,详细阐述了水体中有机污染物的光催化降解机理.最后,对g-C3N4与Bi系复合光催化材料的开发和应用前景进行了展望.
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