BiOBr/UiO-66-（COOH）2复合材料制备及光催化性能研究

doi:10.19964/j.issn.1006-4990.2021-0138

Abstract

Abstract:

In order to improve the performance of BiOBr and UIO-66-（COOH）₂ photocatalytic materials and the absorption intensity of visible light,as well as their photocatalytic activity and efficiency,a new type of composite photocatalyst BiOBr/UiO-66-（COOH）₂ was prepared by simple solvothermal method.The sample was characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,fourier transform infrared spectroscopy（FT-IR）,photoluminescence（PL）,N₂ absorption-desorption,UV-visual diffuse reflectance spectroscopy（UV-vis DRS） and elec-trochemistry.The photocatalytic activity of BiOBr/UiO-66-（COOH）₂ was investigated in the degradation efficiency of methyl orange.The results showed that after modifying BiOBr with UiO-66-（COOH）₂,BiOBr/UiO-66-（COOH）₂ retained the struc-ture of original materials.Moreover,with the increasing of the corresponding specific surface area,the visible light absorption of the sample increased.Under xenon lamp irradiation for 120 minutes,the degradation rate of BiOBr/UiO-66-（COOH）₂ to methyl orange was as high as 70%,which was about 3.68 times and 1.43 times of pure UiO-66-（COOH）₂ and BiOBr.The activity of the composite was significantly improved,and the photocatalytic degradation process was conformed to the law of first-order reaction kinetics.

Key words: solvothermal method, composite material, photocatalysis, dye degradation

CLC Number:

O614.53

XIONG Yun,CHEN Xin,ZHANG Jing,DENG Niyan,ZHANG Quan,LIU Shengpeng,SUN Guofeng. Preparation and photocatalytic properties of BiOBr/UiO-66-（COOH）₂ composite materials[J]. Inorganic Chemicals Industry, 2021, 53(12): 150-155.

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References 22

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Preparation and photocatalytic properties of BiOBr/UiO-66-（COOH）₂ composite materials

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Preparation and photocatalytic properties of BiOBr/UiO-66-（COOH）2 composite materials