W_(18)O_(49)/BiOI复合光催化剂的制备及性能研究  

Preparation and Photocatalytic Dye Degradation Properties of W_(18)O_(49)/Bioi Heterojunction

作　　者：米世新 牟红旭 杨陆娟 王剑浩 吴鹏伟 张显华 刘子薇 庄艳丽[1] MI Shixin;MU Hongxu;YANG Lujuan;WANG Jianhao;WU Pengwei;ZHANG Xianhua;LIU Ziwei;ZHUNG Yanli(Harbin University of Science&Technology,School of Materials Science and Chemical Engineering,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学材料科学与化学工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2023年第1期122-128,共7页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金青年科学基金(52105332);先进焊接与连接国家重点实验室开放课题基金面上项目(AWJ-22M15);有色金属及材料加工新技术教育部重点实验室开放基金(20KF14);黑龙江省大学生创新性实验计划资助项目(8105/218200003)。

摘　　要：以BiOI为前驱体,采用化学沉淀法对W_(18)O_(49)(2%)/BiOI复合材料进行了制备,为了研究该材料的光催化性能,利用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)和荧光分光光度计(PL)对样品进行表征。结果表明,W_(18)O_(49)的引入未改变BiOI的晶型结构,纯BiOI的降解率约为21%,与W18O49复合后材料的降解率约达到98%,复合后材料的降解率显著高于纯物质的降解效率,纯BiOI材料和W_(18)O_(49)的带隙宽度分别约为1.97eV和3.06eV,理论上可形成异质结,有助于加速电子转移速率,有效降低了电子和空穴对的复合,很好的提升材料的光催化活性。Using BiOI as the precursor,the W_(18)O_(49)(2%)/BiOI material was prepared by chemical precipitation method.In order to study the photocatalytic performance of the material.The samples were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM),ultraviolet visible diffuse reflectance spectroscopy(UV-Vis DRS)and fluorescence spectrophotometer(PL).The results showed that the introduction of W_(18)O_(49)did not change the crystal structure of BiOI,and the degradation rate of pure BiOI was about 21%,and the degradation rate of the material with W_(18)O_(49)reached about 98%.The degradation rate of the composite material is significantly higher than that of pure material.The band gap width of pure BiOI and pure W_(18)O_(49)meterials are about 1.97 eV and 3.06 eV.They can form heterojunctions,accelerate the electron transfer rate,effectively reduce the recombination of electron and hole pairs,and improve the photocatalytic activity of the material.

关 键 词：W_(18)O_(49) BiOI 复合材料 化学沉淀法 光催化性能 

分 类 号：TQ135.32[化学工程—无机化工] TQ136.13