复合光催化剂CoFe2O4/BiVO4/电气石的超声-光催化研究

doi:10.11896/cldb.21090095

材料导报

2023, Vol. 37

Issue (6): 21090095-6 https://doi.org/10.11896/cldb.21090095

无机非金属及其复合材料

复合光催化剂CoFe₂O₄/BiVO₄/电气石的超声-光催化研究

张进治^*, 谢亮

北方工业大学理学院,北京 100144

Study on the Ultrasonic Photocatalytic Behavior of Composite Photocatalyst CoFe₂O₄/BiVO₄/Tourmaline

ZHANG Jinzhi^*, XIE Liang

School of Science, North China University of Technology, Beijing 100144, China

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摘要以电气石为载体,采用水热法原位生长BiVO₄、CoFe₂O₄,得到CoFe₂O₄/BiVO₄/电气石复合光催化剂,利用XRD、SEM、EDS、UV-Vis DRS等方法对材料进行了表征,通过降解灿烂绿对样品的声光催化性能进行评价。结果表明,在60 min可见光下,BiVO₄对灿烂绿的降解率为33.5%,CoFe₂O₄(10%)/BiVO₄(45%)/电气石对灿烂绿的降解率为74%;在60 min可见光+超声下,BiVO₄对灿烂绿的降解率为61.5%,CoFe₂O₄(10%)/BiVO₄(45%)/电气石在声光作用下(12 min内)对灿烂绿的降解率高达99.2%。高效的降解率可能与复合结构的异质结有关,CoFe₂O₄/BiVO₄/电气石对可见光的吸收能力得到提高,促进了光生电子-空穴的分离,从而有效增强光降解性能。另外,从超声+光催化的效果可看出超声协同光催化降解效果显著。声光催化在有机污染物降解领域内的应用成为一个重要研究方向,如能结合彼此优点,可望开发出高效实用的催化材料。

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关键词: 复合光催化剂超声-光催化铁酸钴/钒酸铋/电气石

Abstract: CoFe₂O₄/BiVO₄/tourmaline composite photocatalysts were grown in situ by hydrothermal method with tourmaline as carrier. The materials were characterized by XRD, SEM, EDS and UV-Vis DRS. The acousto-optic catalytic performance of the samples was evaluated by degrading brilliant green. The results showed that under visible light in 60 min, the degradation rate of brilliant green by BiVO₄ was 33.5%, the degradation rate of brilliant green by CoFe₂O₄ (10wt%)/BiVO₄(45wt%)/tourmaline was 74%; Under visible light+ultrasound for 60 min, the degradation rate of brilliant green by BiVO₄ was 61.5%, and the degradation rate of brilliant green by CoFe₂O₄ (10wt%)/BiVO₄ (45wt%)/tourmaline acousto-optic (within 12 min) was as high as 99.2%. The efficient degradation rate may be related to the heterojunction of the composite structure. CoFe₂O₄/BiVO₄/tourmaline improves the absorption capacity of visible light, promotes the separation of photogenerated electrons and holes, and effectively enhances the photodegradation performance. In addition, from the effect of ultrasound+photocatalysis, it can be seen that ultrasound cooperates with photocatalysis. The application of acoustooptic catalysis in the degradation of organic pollutants is becoming an important research direction. If we can combine the advantages of each other, it is expected to develop efficient and practical catalytic materials.

Key words: composite photocatalyst ultrasound-photocatalysis CoFe₂O₄/BiVO₄/tourmaline

发布日期: 2023-03-27

ZTFLH:

O643

基金资助: 北京市高水平队伍建设青年拔尖人才项目(CIT&TCD201904012)

通讯作者: *张进治,北方工业大学副教授、物理系副主任。1986年本科毕业于山东大学。主要研究方向为光催化纳米材料。最近研究了BiVO₄、Ag/BiVO₄、Au/BiVO₄、Gd₂O₃/BiVO₄、Cu/BiVO₄、BiVO₄/Co₃O₄、BiVO₄/NiO、Co₃O₄/ZnO/BiVO₄等异质结材料的制备和光催化效果。在国内核心期刊和国际期刊发表学术论文46篇,其中SCI、EI收录21篇。主持多项研发项目。主编了《大学物理实验》和《工科物理实验》两本大学物理实验教材。zhangjzh@ncut.edu.cn

引用本文:

张进治, 谢亮. 复合光催化剂CoFe₂O₄/BiVO₄/电气石的超声-光催化研究[J]. 材料导报, 2023, 37(6): 21090095-6.
ZHANG Jinzhi, XIE Liang. Study on the Ultrasonic Photocatalytic Behavior of Composite Photocatalyst CoFe₂O₄/BiVO₄/Tourmaline. Materials Reports, 2023, 37(6): 21090095-6.

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http://www.mater-rep.com/CN/10.11896/cldb.21090095 或 http://www.mater-rep.com/CN/Y2023/V37/I6/21090095

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