复合催化剂ZnFe2O4/FeVO4的制备及光催化性能

为了降解污水中的有机染料,对复合催化剂ZnFe2 O4/FeVO4光降解有机染料进行了研究,以促进水中生物的健康生长和整个生态系统的平衡.通过聚乙烯吡咯烷酮(PVP)辅助水热法制备出了ZnFe2 O4,通过水热法制得了FeVO4,并按照ZnFe2 O4和FeVO4不同质量比合成了复合催化剂ZnFe2 O4/FeVO4....

Preparation and Photocatalytic Properties of Composite Catalyst ZnFe2O4/FeVO4

In order to degrade organic dyes in wastewater, the photocatalytic degradation of organic dyes by composite catalyst ZnFe₂O₄/FeVO₄ was studied to promote the healthy growth of aquatic organisms and the balance of the entire ecosystem. ZnFe₂O₄ was prepared by PVP assisted hydrothermal method, FeVO₄ was prepared by hydrothermal method and the composite catalyst ZnFe₂O₄/FeVO₄ was synthesized according to the different mass ratios of ZnFe₂O₄ and FeVO₄. The activities of ZnFe₂O₄, FeVO₄ and composite catalyst ZnFe₂O₄/FeVO₄ were tested under the same conditions with the methyl orange as the degradation dye. The experimental results indicate that composite catalyst ZnFe₂O₄/FeVO₄ is a high efficiency catalyst. Through SEM analysis, it is seen that the ZnFe₂O₄ and FeVO₄ are combined together. With the condition of adding H₂O₂, after 20 min of reaction, the dye degradation rates of ZnFe₂O₄ and FeVO₄ are only 15% and 25% respectively, and the dye degradation rate of ZnFe₂O₄/FeVO₄ reaches 75%. The effects of catalyst dosage, H₂O₂ concentration and pH value on the catalytic activity ZnFe₂O₄/FeVO₄ were investigated. The results show that ZnFe₂O₄/FeVO₄ samples have the best photocatalytic efficiency when pH value of the solution is 5.0, H₂O₂ concentration is 0.044 mol/L and the catalyst dosage is 1.0 g/L.