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

作　　者：熊芸 陈新[2] 张静 邓妮艳 张权 刘生鹏 孙国锋[1,2] XIONGYun;CHENXin;ZHANGJing;DENGNiyan;ZHANGQuan;LIUShengpeng;SUNGuofeng(Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education,Wuhan Institute of Technology,Wuhan 430205,China;School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology)

机构地区：[1]武汉工程大学磷资源开发利用教育部工程研究中心,湖北武汉430205 [2]武汉工程大学化工与制药学院

出　　处：《无机盐工业》2021年第12期150-155,共6页Inorganic Chemicals Industry

基　　金：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)。

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、N_(2)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。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(FTIR),photoluminescence(PL),N_(2) absorption-desorption,UV-visual diffuse reflectance spectroscopy(UV-vis DRS)and electrochemistry.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 structure 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.

关 键 词：溶剂热法 复合材料 光催化 染料降解 

分 类 号：O614.53[理学—无机化学]