“…As compared to the nanostructured Bi, W and Cu-containing photocatalysts and heterojunction photocatalysts reported in the recent years, CBTO prepared by the improved protocol performs favourably in terms of low catalyst loading, short reaction time to reach 100% Cr( vi ) photoreduction for comparable initial Cr( vi ) concentration, and low concentration of hole scavenger needed to achieve fast photoreduction (Table S1†). 3,16,30–34 In general, the CBTO photocatalyst particles show superior performance compared to other single-material photocatalyst particles, and comparable performance to heterojunction photocatalysts.…”