TiO2/MIL-53(Al)和TiO2/Al2O3催化剂的制备及其光催化性能研究  

Preparation of TiO2/MIL-53(Al)and TiO2/Al2O3 catalysts and their photocatalytic performance

作　　者：谭海燕 孟泽 冯翰林 胡卫兵 吴得勇 谭学才[2] TAN Haiyan;MENG Ze;FENG Hanlin;HU Weibing;WU Deyong;TAN Xuecai(Key Laboratory of Biologic Resources Protection and Utilization,Hubei Province/School of Chemistry and Environmental Engineering, Hubei University for Nationalities,Enshi 445000, China;Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi University for Nationalities, Nanning 530006, China)

机构地区：[1]生物资源保护与利用湖北省重点实验室/湖北民族大学化学与环境工程学院,恩施445000 [2]广西民族大学广西林产化学与工程重点实验室,南宁530006

出　　处：《华中农业大学学报》2020年第3期68-74,共7页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(21769009);湖北省恩施州科技局指导性项目(恩州科业[2018]19号);生物资源保护与利用湖北省重点实验室(PKLHB1706);广西林产化学与工程重点实验室开放项目(GXFK1904);广西科技基地和人才专项(桂科AD18126005);湖北省“双一流”建设专项。

摘　　要：采用溶剂热法合成了MIL-53(Al),以此为载体负载TiO2制备得到TiO2/MIL-53(Al)光催化剂用于污水中次甲基蓝的催化降解研究,并与传统载体材料Al2O3负载的TiO2催化剂的光催化效果进行比较。样品通过热重-差热扫描量热(TG-DSC)、红外光谱(FTIR)、扫描电镜(SEM)、X射线衍射(XRD)、N2物理吸附-脱附等方法进行表征。采用光度吸收法分析污水中次甲基蓝的降解率,结果显示,TiO2/MIL-53(Al)光催化剂对次甲基蓝的光催化降解率达到98.6%,而TiO2/Al2O3光催化剂对次甲基蓝的降解率只有70.3%,TiO2/MIL-53(Al)光催化剂对污水中次甲基蓝的降解去除能力明显优于TiO2/Al2O3光催化剂对次甲基蓝的降解去除能力。MIL-53(Al)was synthesized by solvothermal method,and TiO2/MIL-53(Al)photocatalyst was prepared by using TiO2 as the carrier for the catalytic degradation of methine blue in sewage.The photocatalytic performance of the TiO2/MIL-53(Al)and the TiO2/Al2O3 was compared.The catalysts were characterized by thermogravimetric-differential scanning calorimeter(TG-DSC),Fourier transform infrared(FTIR)spectroscopy,scanning electron microscopy(SEM),X-ray diffraction(XRD)and N2 adsorption-desorption.The photodegradation efficiency of submethyl blue was analyzed by photometric absorption method.The results showed that the degradation rate of methylene was more than 98.6%on TiO2/MIL-53(Al)photocatalyst,but that of methylene was only 70.3%on TiO2/Al2O3 photocatalyst.Therefore,the photocatalytic activity of TiO2/MIL-53(Al)photocatalyst exhibited much higher than that of the TiO2/Al2O3 photocatalyst in degradating methyl blue.

关 键 词：金属有机骨架材料 次甲基蓝 污水处理 光催化降解 去除率 

分 类 号：O643[理学—物理化学]