Graphene, charcoal, ZnO, and ZnS/BiOX (X = Cl, Br, and I) hybrid microspheres for photocatalytic simulated real mixed dye treatments

Abstract

Graphene, charcoal, ZnO, and ZnS/BiOX (X = Cl, Br, and I) hybrid microspheres were synthesized for use in the photocatalytic treatment of a mixed dye of MO (methyl orange), RhB (rhodamine B), and MB (methylene blue) solution. The dye degradation rate was generally observed in the order of RhB < MB < MO. The order became MB < RhB < MO for ZnO/BiOI and ZnS/BiOI. The catalysts hybridized with BiOI generally showed superior adsorption capacity to those of the materials hybridized with BiOCI or BiOBr. The 10 mol% ZnO/BiOI and ZnS/BiOI showed selectivity for MB adsorption in the mixed dye. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.