复合催化剂ZnFe2O4/FeVO4的制备及光催化性能

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1707-1713.

所属专题：新型功能材料

复合催化剂ZnFe₂O₄/FeVO₄的制备及光催化性能

刘帅, 谢银德, 闫硕, 侯保森, 刘瑞杰

郑州大学材料科学与工程学院,郑州 450001

收稿日期:2020-10-12 修回日期:2021-01-05 出版日期:2021-05-15 发布日期:2021-06-07
通讯作者: 谢银德,博士,副教授。E-mail:ydxie@zzu.edu.cn
作者简介:刘帅(1995—),男,硕士研究生。主要从事光催化研究。E-mail:1970360090@qq.com
基金资助:
河南省科技研发专项(192102210049)

Preparation and Photocatalytic Properties of Composite Catalyst ZnFe₂O₄/FeVO₄

LIU Shuai, XIE Yinde, YAN Shuo, HOU Baosen, LIU Ruijie

School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

Received:2020-10-12 Revised:2021-01-05 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 为了降解污水中的有机染料,对复合催化剂ZnFe₂O₄/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ZnFe₂O₄,通过水热法制得了FeVO₄,并按照ZnFe₂O₄和FeVO₄不同质量比合成了复合催化剂ZnFe₂O₄/FeVO₄。以甲基橙为降解染料,在相同条件下对ZnFe₂O₄、FeVO₄和复合催化剂ZnFe₂O₄/FeVO₄进行活性对比实验,结果表明,所合成的复合催化剂ZnFe₂O₄/FeVO₄是一种高效率催化剂。通过扫描电子显微镜(SEM)分析,可以看出ZnFe₂O₄和FeVO₄复合在了一起。在加入H₂O₂的条件下反应20 min,ZnFe₂O₄和FeVO₄对甲基橙的降解率分别为15%和25%,而复合催化剂ZnFe₂O₄/FeVO₄对甲基橙的降解率可以达到75%。此外,以ZnFe₂O₄/FeVO₄为样品考察了催化剂用量、H₂O₂浓度和pH值对催化活性的影响,结果表明,ZnFe₂O₄/FeVO₄样品的最佳催化条件为:溶液pH=5.0、H₂O₂浓度为0.044 mol/L、催化剂用量为1.0 g/L。

关键词: 铁酸盐, 钒酸铁, 催化剂, 甲基橙, 降解, 光催化性能

Abstract: 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.

Key words: ferrite, ferric vanadate, catalyst, methyl orange, degradation, photocatalytic property

中图分类号:

TQ426.8

刘帅, 谢银德, 闫硕, 侯保森, 刘瑞杰. 复合催化剂ZnFe₂O₄/FeVO₄的制备及光催化性能[J]. 硅酸盐通报, 2021, 40(5): 1707-1713.

LIU Shuai, XIE Yinde, YAN Shuo, HOU Baosen, LIU Ruijie. Preparation and Photocatalytic Properties of Composite Catalyst ZnFe₂O₄/FeVO₄[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1707-1713.

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复合催化剂ZnFe₂O₄/FeVO₄的制备及光催化性能

Preparation and Photocatalytic Properties of Composite Catalyst ZnFe₂O₄/FeVO₄

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