Research progress of double perovskite photocatalyst materials

Perovskite materials have some distinct advantages, e.g. stable chemical structure, abundant types, good adjustability. Therefore, perovskite materials are widely used in photocatalys is technology. However, simple perovskites are confronted with some shortcomings such as poor light absorption, large band gap, and poor moisture resistance in photocatalytic applications. Recent investigations show that compared with simple perovskites, double perovskites have better stability, more complex atomic environments, larger composition space, and can accommodate high-valence elements. Therefore, the double perovskiteshave aroused intensively studied. This paper mainly described the research progress of double perovskite photocatalysts in recent years, including the ordered double perovskite, lead-free halide double perovskite, complex double perovskite, oxygen-deficient double perovskite and so on. The photocatalytic mechanism of the double perovskite was introduced and analyzed. Double perovskite effectively promotes photo-generated electron-hole separation through improving the crystal structure and absorption properties of catalysts. Thus, the photocatalytic activity is expected to be increasing easy. Finally, the research direction and prospect of double perovskite photocatalysts were proposed.