Silver/silver halide supported on mesoporous ceria particles and photo-CWPO degradation under visible light for organic compounds in acrylonitrile wastewater

Silver/silver halide supported on ordered mesoporous ceria particles (Ag/AgCl/CeO(2)) were rapidly prepared by microwave-assisted soft template method, deposition precipitation method and photoreduction method, using cerium nitrate and silver nitrate as raw materials and block copolymer F127 as a template. The morphology, structure and chemical composition of the catalyst were characterized by XRD, SEM, EDS, TEM, N(2) adsorption–desorption and UV-Vis Drs. Catalytic wet peroxide system assisted with visible light photocatalysis (photo-CWPO) was conducted to investigate the performance of organics degradation by Ag/AgCl/CeO(2) as a catalyst in acrylonitrile wastewater. The results showed that the Ag/AgCl/CeO(2) prepared has an ordered mesoporous structure, Ag and AgCl are formed on the surface of CeO(2), with a specific surface area of 302.6–336.2 m(2) g(−1) and the average pore size is 8.04–8.90 nm. There is a strong absorption in the visible region and a band gap of 2.9 eV. The Ag/AgCl/CeO(2) catalyst has higher catalytic performance in the photo-CWPO system than in the CWPO system alone. Ag loading, catalyst and H(2)O(2) dosage, and pH value can affect the COD removal. When the concentration of COD in acrylonitrile wastewater was 500 mg L(−1), the amount of catalyst was 200 mg, the amount of H(2)O(2) (30%) was 8 mL, and the reaction time was 60 min, the COD removal reached 90%.