高比表面积石墨相氮化碳的制备及其光催化应用研究进展

Progress on the synthesis and photocatalytic applications of graphitic carbon nitride with high surface area

摘要:

石墨相氮化碳（g-C3N4）具有较好的物理化学稳定性，合适的能带结构，良好的可见光吸收性能，因而在光催化领域得到了广泛关注。作为异相催化剂，高比表面积可以提供较多的反应位点，增加反应物的接触，改善传质，从而促进催化性能的提升。本文综述了高比表面积g-C3N4的合成方法，介绍了两种增加g-C3N4比表面积的途径：（1）模板法制备多孔g-C3N4；（2）剥离法制备薄层g-C3N4纳米片。本文对高比面积g-C3N4的光催化应用也做了相应的介绍，并对g-C3N4的发展前景做了展望。

Abstract:

Graphitic carbon nitride (g-C3N4) possesses good physical and chemical stability, suitable band structure and efficient visible light response, which has attracted numerous attention for photocatalytic applications. As heterogeneous catalyst, high surface area can provide abundant reaction sites, increase contact between reactants and catalyst, and enhance mass transfer, which are beneficial for catalytic efficiency enhancement. This review focuses on the preparation and photocatalytic applications of g-C3N4 with high surface area. Two major strategies are reviewed, which are template method for porous g-C3N4 preparation and exfoliation for thin-layer g-C3N4 nanosheet preparation. In addition, the photocatalytic applications of g-C3N4 are introduced. Finally, the prospective of g-C3N4 is described.