g-C_(3)N_(4)基异质结光催化剂研究进展

Research Progress on g-C_(3)N_(4)Based Heterojunction Photocatalysts

石墨相氮化碳(g-C_(3)N_(4))是一种典型的非金属n型聚合物半导体光催化剂.因其具有合适的带隙(2.7 eV),高的热稳定性和化学稳定性,较强的可见光响应等优良特性而被广泛关注.基于g-C_(3)N_(4)构建出2种或2种以上的半导体异质结,具有提高可见光利用率,增强氧化还原能力,促进光生载流子转移和分离等作用,因而成为一种提高光催化活性的可行和高效策略.综述了近年来g-C_(3)N_(4)基异质结的构建及其光催化机理的研究进展,并进一步展望了研究前景.

Graphitic phase carbon nitride(g-C_(3)N_(4))is a typical nonmetallic n-type polymer semiconductor photocatalyst.Due to its excellent characteristics such as the suitable band gap(2.7 eV),high thermal and chemical stability,and strong visible light response,it has been widely drawn close attention.The construction of two or more semiconductor heterostructures based on g-C_(3)N_(4)has the multiple functions,such as improving the visible light utilization,enhancing redox ability,and promoting the transfer and separation of photogenerated carriers.Therefore,it has become a feasible and efficient strategy to improve photocatalytic activity.The recent progress in the construction of g-C_(3)N_(4)heterojunction and its photocatalytic mechanism were summarized,and the research prospect was further prospected.