石墨相氮化碳光催化产氢性能提升策略研究进展

Recent advances in improving the performance of graphite-phase carbon nitride based photocatalysts for hydrogen evolution

石墨相氮化碳(g-C_(3)N_(4))因带隙窄、稳定性高、成本低、污染小等优势在光催化产氢领域受到了研究者们的广泛关注.然而,纯g-C_(3)N_(4)直接作为光催化剂在应用时常存在比表面积小、可见光利用效率低以及光生载流子复合过快等缺陷,导致其光催化产氢性能较不理想.因此,如何改善g-C_(3)N_(4)的光催化产氢性能是目前光催化领域的研究热点.该文针对g-C_(3)N_(4)光催化产氢性能的优化研究,系统综述了g-C_(3)N_(4)在形貌调节、杂原子掺杂和异质结构建三个方面的改性研究进展,归纳总结了目前存在的问题,并对今后g-C_(3)N_(4)产氢光催化剂的研究重点和方向做出了展望.

Graphite phase carbon nitride(g-C_(3)N_(4))has attracted extensive attentions in the field of photocatalytic hydrogen evolution,since the advantages of narrow band gap,high stability,low cost and pollution.However,the pure g-C_(3)N_(4) has the defects of small specific surface area,low visible light utilization efficiency,high photo-generated carrier recombination rate,which results in unsatisfactory performance of photocatalytic hydrogen evolution.Therefore,the current research hotspots in the field of photocatalysis is to significantly improve the photocatalytic hydrogen evolution activity of g-C_(3)N_(4).In this article,the modification and optimization strategies of g-C_(3)N_(4) are systematically reviewed,including morphology adjustment,heteroatom doping and heterostructure construction.Meanwhile,the existing problems of g-C_(3)N_(4) based photocatalysis are also analyzed.Additionally,the future research focus and direction of g-C_(3)N_(4)-based hydrogen evolution photocatalysts are forecasted.