Abstract
In this study, hierarchical porous ZnO photocatalysts were successfully prepared using bionic material rice husk as biological template. Bi2WO6/pure ZnO and Bi2WO6/hierarchical porous ZnO catalysts with different Bi2WO6 doping amounts were prepared via hydrothermal synthesis. The results show that the specific surface area of Bi2WO6/hierarchical porous ZnO catalyst with rice husk as biological template was 131.8505 m2/g, which was 101 m2/g higher than that of Bi2WO6/pure ZnO catalyst without rice husk as biological template. In addition, the hierarchical porous ZnO photocatalyst with rice husk template increased the degradation efficiency of microcystin (MC-LR) by 10.60% compared with commercially available ZnO photocatalyst. When the optimum doping amount was 0.2 mol/mol, the degradation efficiency of MC-LR by 0.2Bi2WO6/hierarchical porous ZnO was 79.0%, which was higher than that of the composite catalyst without rice husk template and single photocatalyst. This study provides a new idea for the degradation of MC-LR by using green photocatalyst.
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