ZIF-8@TiO_(2)复合材料的制备及光催化性能  

Preparation and Photocatalytic Properties of ZIF-8@TiO_(2)Composite Photocatalysts

作　　者：涂盛辉[1,2] 钟荣福 张超 刘桉如[1] 吴文彬 杜军 TU Shenghui;ZHONG Rongfu;ZHANG Chao;LIU Anru;WU Wenbin;DU Jun(School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang 330031,China)

机构地区：[1]南昌大学化学化工学院,南昌330031 [2]鄱阳湖环境与资源利用教育部重点实验室,南昌330031

出　　处：《材料导报》2024年第16期29-34,共6页Materials Reports

基　　金：国家自然科学基金(31660482,51162022)。

摘　　要：本研究采用水热法制备了一种新型的高效光催化微米复合材料ZIF-8@TiO_(2),并比较了ZIF-8、TiO_(2)纳米球和ZIF-8@TiO_(2)光催化降解罗丹明B的能力。通过扫描电子显微镜(SEM)、X射线衍射(XRD)仪、X射线光电子能谱(XPS)仪、紫外-可见漫反射光谱(DRS)仪、傅里叶变换红外光谱(FTIR)仪和比表面积测量(BET)仪对合成的材料进行了表征。结果表明,TiO_(2)纳米球在ZIF-8表面均匀生长,ZIF-8和TiO_(2)通过化学键连接在一起。ZIF-8和TiO_(2)的协同作用大大增强了复合光催化剂的催化能力。其中ZIF-8@TiO_(2)复合材料的ZIF-8为电荷分离器中光生电子转移提供了一种新的方式,以降低电荷复合率。由于该混合物结合了ZIF-8和TiO_(2)的优点,ZIF-8@TiO_(2)显示出优异的光催化降解罗丹明B的能力。同时讨论了复合光催化剂可能的光催化机理。In this work,a novel and efficient photocatalytic micron composite ZIF-8@TiO_(2)was prepared by hydrothermal method.We compared the ability of ZIF-8,TiO_(2)nanospheres and ZIF-8@TiO_(2)to photocatalytically degrade rhodamine B(RhB).The composite catalyst were investigated by scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-vis diffuse reflectance spectroscopy(DRS),specific copy Fourier transform infrared spectrometer(FTIR),and surface area measuring instrument(BET).The results of the characterization show that the TiO_(2)nanospheres grow uniformly on the surface of ZIF-8,and ZIF-8 as well as TiO_(2)are connected together by chemical bonds.The synergistic effect of ZIF-8 and TiO_(2)greatly enhances the catalytic ability of the composite photocatalyst.Among them,ZIF-8 in the ZIF-8@TiO_(2)composite provides a new way for photogenerated electron transfer in charge separators to reduce the charge recombination rate.Since the hybrid combines the advantages of ZIF-8 and TiO_(2),ZIF-8@TiO_(2)shows excellent photocatalytic degradation of rhodamine B.Finally,the possible photocatalytic mechanism of the hybrid photocatalyst was also discussed.

关 键 词：水热法 ZIF-8@TiO_(2) 光催化 罗丹明B 

分 类 号：O643[理学—物理化学]