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

摘要/Abstract

摘要：

为提高传统光催化材料BiOBr和UiO-66-（COOH）₂的性能和对可见光的吸收强度,以及它们的光催化活性和光催化效率,通过简单的溶剂热法制备了一种新型复合光催化剂BiOBr/UiO-66-（COOH）₂。运用X射线衍射光谱（XRD）、扫描电镜（SEM）、透射电镜（TEM）、红外光谱（FT-IR）、光致发光（PL）光谱、N₂吸附-脱附、紫外-可见漫反射光谱（UV-Vis DRS）和电化学等手段对其进行表征,并对其光催化降解甲基橙的效率进行了研究。结果表明,相对于单一的BiOBr材料,与UiO-66-（COOH）₂复合之后的BiOBr/UiO-66-（COOH）₂催化剂保留了原有材料的结构,相应的比表面积增大,对可见光的吸收强度增强。将BiOBr/UiO-66-（COOH）₂用于光催化降解甲基橙,在氙灯照射120 min后,甲基橙的降解率达到70%,分别约为纯UiO-66-（COOH）₂和BiOBr的3.68倍和1.43倍,光催化活性显著提高,光催化降解过程符合一级反应动力学规律。

关键词: 溶剂热法, 复合材料, 光催化, 染料降解

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

中图分类号:

O614.53

熊芸,陈新,张静,邓妮艳,张权,刘生鹏,孙国锋. BiOBr/UiO-66-（COOH）₂复合材料制备及光催化性能研究[J]. 无机盐工业, 2021, 53(12): 150-155.

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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BiOBr/UiO-66-（COOH）₂复合材料制备及光催化性能研究

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

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