Highly Stable CsPbBr3 Colloidal Nanocrystal Clusters as Photocatalysts in Polar Solvents

One of the main challenges of all-inorganic cesium lead halide (CsPbX3) perovskite nanocrystals (NCs) in photocatalysis is their poor stability in hostile environments such as polar solvents. Herein, we report highly stable CsPbBr(3 )colloidal nanocrystal clusters (CNCs) with uniform morphology and size prepared by using a PVP-assisted reprecipitation method. A possible formation process through a self-assembly avenue is proposed. These CsPbBr3 CNCs exhibit much enhanced resistance against a variety of polar solvents in comparison with CsPbBr3 NCs obtained from the co, commonly used hot-injection method. In addition, this method can be generalized to the synthesis of lead-free perovskites CNCs. The as-prepared CsPbBr3 CNCs display good reactivity and high durability in photocatalytic degradation of methylene blue in alcoholic systems. This work will shed some light on the stabilization of perovskite NCs in polar solvents and perovskite NC-based photocatalysts.

Automated summary

Highly stable CsPbBr3 colloidal nanocrystal clusters (CNCs) with uniform morphology and size were prepared using a PVP-assisted reprecipitation method. These CNCs exhibit enhanced resistance against a variety of polar solvents and show good reactivity and high durability in photocatalytic degradation of methylene blue in alcoholic systems. This method can also be generalized to the synthesis of lead-free perovskites CNCs.