Ultra-stable Bi4O5Br2/Bi2S3 n-p heterojunctions induced simultaneous generation of radicals OH and O2− and NO conversion to nitrate/nitrite species with high selectivity under visible light

Advancement of photocatalytic systems that restricted formation and emission of toxic by-product NO2 remained a great challenge regarding NO removal. To circumvent this issue, in this study composites Bi4O5Br2/Bi2S3 were constructed through a facile anion exchange route that sulfurized pure Bi4O5Br2 (BB) in CS2 under room temperature. In-situ formed Bi2S3 (BS) was identified and intimately connected with BB to form n-p heterojunctions. Under...