Bi-based semiconductors possess many merits such as unique electronic energy band structures, adjustable and extensible spectral response ranges, low toxicity and a wealth of element resources supply, thus becoming one type of the most promising candidates for photocatalysis with high-efficiency and practicability. Especially noteworthy is that the Bi-based nonmetal oxysalts exhibit specifically characteristic photocatalytic activities due to their high crystallinity and surface modification effect of the nonmetal oxyacid ions. In this paper, the research progress of Bi-based semiconductors in recent years is briefly introduced. Particularly, the research progress in synthesis, construction of heterojunction and the electronic energy band structure of Bi₂SiO₅ is reviewed, and its future researches and applications are also prospected.
Contents
1 Introduction
2 Research status and development trend
2.1 Bi-based photocatalysts
2.2 Bi-based nonmetal oxysalt photocatalysts
2.3 Bi₂SiO₅ photocatalyst
3 Conclusion and outlook