In recent years, metal halide perovskite nanocrystals (NCs) have garnered interest as potential photocatalysts for organic pollutant degradation. While lead-based halide perovskites have been the most studied, due to their poor water stability and toxicity concerns, it is of interest to move towards more stable, lead-free alternatives. In this study, Cs₃Bi₂Br₉ NCs synthesized by the hot injection method are applied as photocatalysts to the degradation of rhodamine 6G dye (RhG) in an aqueous environment. As synthesized Cs₃Bi₂Br₉ NCs showed a 2-fold increase in rate compared to commercially available P25 TiO₂ and achieved near 90 % efficiency in a time frame of 2.5 h compared to 65 % for P25 TiO₂. Sb alloying can be used to further improve efficiency with Cs₃Bi_1.7Sb_0.3Br₉ NCs demonstrating modest rate increases over Cs₃Bi₂Br₉ and 95 % conversion.