HUANG Huicheng ¹, ZHOU Zhiwen ¹, GUO Wei ¹, LIU Zixiong ¹, WANG Yanxia ¹, YAO Yuanzhuo ¹,  WEI Zhishun ^1,2,3, CHEN Yuan ^1,2,

(1. School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, Hubei, China; 2. Collaborative Innovation Center for Green Lightweight Materials and Processing, Hubei University of Technology, Wuhan 430068, Hubei, China; 3. Hubei Provincial Key Laboratory of Green Light Industrial Materials, Hubei University of Technology, Wuhan 430068, Hubei, China)

Abstract: TiO₂, ZnO and WO₃ precursors were synthesized with metal-salts and loaded on homemade porous foam stones to prepare porous foam-based photocatalysts. Taking methyl orange as the degradation target, the influence of methyl orange concentration on photocatalytic performance of different loaded oxides was studied. The reusability of the porous foam-based photocatalysts was examined. It was found that the lower the concentration of methyl orange, the higher the photocatalytic efficiency would be. When the concentration of methyl orange was 5 mg/L, the photodegradation efficiencies of the porous foam stones loaded with TiO₂, ZnO and WO₃ were 26.25%, 26.64% and 11.01%, respectively. The porous foam-based photocatalysts exhibited promising photocatalytic activity and stability. After 4 times of repeating, the photodegradation efficiencies of the porous foam stones loaded with TiO₂, ZnO and WO₃ only degraded by 6.07%, 5.06% and 2.83%, respectively.
Key words: impregnation-sintering; porous foam stones; photocatalysis