BiOI/Zn-Bi_(2)WO_(6)异质结的构建及光催化降解磺基水杨酸研究  

Photocatalytic degradation of sulfosalicylic acid on BiOI/Zn-Bi_(2)WO_(6) heterojunction

作　　者：李晓杰 常飙 李冬梅 田忠贞 LI Xiaojie;CHANG Biao;LI Dongmei;TIAN Zhongzhen(Inner Mongolia Key Laboratory of Coal Chemical Engineering&Comprehensive Utilization,School of Chemistry and Chemical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学化学与化工学院内蒙古自治区煤化工与煤炭综合利用重点实验室,内蒙古包头014010

出　　处：《功能材料》2023年第4期4120-4125,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(32060623);内蒙古自治区科技计划项目(2021GG0041,2021GG0044);内蒙古自然科学基金项目(2020MS02006,2020MS02016)。

摘　　要：采用水热法制备了BiOI/Zn-Bi_(2)WO_(6)异质结光催化剂。X射线粉末衍射(XRD)分析其物相、扫描电镜(SEM-EDS)分析其形貌和元素组成、X射线光电子能谱(XPS)分析其表面物种的化学态、紫外-可见吸收光谱(UV-Vis)分析其对太阳光的利用率、光致发光光谱(PL)和电化学阻抗谱(EIS)分析光生载流子的分离情况等。结果表明:形成异质结后一方面使光催化剂的吸收边红移且吸收强度增加,提高了可见光谱的利用率;另一方面实现了光生空穴-电子的高效分离,所得光催化剂对磺基水杨酸表现出较好的光催化降解性能,120 min内降解率达到82%,且具有较好的稳定性。BiOI/Zn-Bi_(2)WO_(6) heterojunctions were prepared by hydrothermal method.The phase,morphology and elemental composition of BiOI/Zn-Bi_(2)WO_(6) were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM-EDS),respectively.X-ray photoelectron spectroscopy(XPS)was used to analyze the chemical state of its surface species.UV-Vis absorption spectroscopy(UV-Vis)was used to analyze its utilization of sunlight,and photoluminescence spectroscopy(PL)and electrochemical impedance spectroscopy(EIS)was used to analyze the separation of photogenerated carriers.The results indicated that on the one hand,the absorption edge of BiOI/Zn-Bi_(2)WO_(6) shifted to red and the absorption intensity increased,which improved the utilization of visible spectrum.On the other hand,the efficient separation of photogenerated holes and electrons was realized by the formation of heterojunction.BiOI/Zn-Bi_(2)WO_(6) showed good photocatalytic degradation performance and stability on sulfosalicylic acid,and the degradation rate reached 82%within 120 minutes.

关 键 词：BiOI Bi_(2)WO_(6) 异质结 光催化降解 

分 类 号：TB332[一般工业技术—材料科学与工程]