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.
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
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)
出处
《哈尔滨理工大学学报》
CAS
北大核心
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)。
