Preparation of Heterojunctions Based on CsBiBr Nanocrystals and g-CN Nanosheets for Photocatalytic Hydrogen Evolution.

Heterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled CsBiBr nanocrystals (NCs), obtained by wet ball milling synthesis, with g-CN nanosheets (NSs), produced by thermal oxidation of bulk g-CN in air. These methods are reproducible, inexpensive and easy to scale up.