双钙钛矿光催化剂材料研究进展

钙钛矿材料具有化学结构稳定、种类繁多、可调性好等优点，目前广泛应用于光催化技术。然而，简单钙钛矿在光催化应用上存在光吸收效果差、带隙较大、耐湿性差等缺点。研究发现双钙钛矿相较简单钙钛矿具有更好的稳定性、更复杂的原子环境和更大的组成空间，可以容纳高价元素等，因此，双钙钛矿得到更加深入的研究。主要叙述了近年来双钙钛矿型光催化剂的研究进展，分别对有序双钙钛矿、无铅卤化物双钙钛矿、复杂双钙钛矿、氧缺陷双钙钛矿等光催化剂的研究进展进行了总结，并对双钙钛矿光催化反应机理进行了分析，认为双钙钛矿可以有效提高电子-空穴的分离效率，改善催化剂的晶体结构和光吸收性能，实现光催化性能的调控。最后对双钙钛矿光催化剂的发展和研究方向提出了展望。 

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.