Preparation and Photocatalytic Activity of BiOBr with High Exposure {102} Crystalline Surface

Abstract

Flake BiOBr was prepared by one-step hydrothermal method using NaBr and Bi(NO3)3•5H2O as raw materials. The structure of the samples was characterized by means of XRD, SEM, UV-VIS. The photocatalytic activity of BiOBr was studied with methylene blue as probe. The results show that BiOBr with high exposure {102} can be obtained when the hydrothermal temperature of the product is 160°C and the hydrothermal time is 24 h. Under visible light, the degradation rate of methylene blue was over 98%. When the catalyst was reused three times, the degradation rate could still reach 80%.

Synthesis, characterization and photocatalytic activity of BiOX (X = Cl, I, Br) and their composites with carbon nanotubes (CNT)

“…One significant correlation was observed with that of crystal facet (003). In the literature, the reported crystal facets responsible for higher photocatalytic activity of BiOX includes (001), ( 120), ( 110) and ( 102) [159,160]. Clearly, this was not the case here.…”