收稿日期: 2021-04-15
网络出版日期: 2021-12-16
基金资助
磷资源开发利用教育部工程研究中心开放基金(LKF201902);武汉工程大学研究生教育创新基金(CX2019025)
Preparation and photocatalytic properties of BiOBr/UiO-66-(COOH)2 composite materials
Received date: 2021-04-15
Online published: 2021-12-16
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。
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 . DOI: 10.19964/j.issn.1006-4990.2021-0138
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
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