纳米介孔TiO_(2)光催化剂对染料污水的去除研究  

Study on the removal of dye effluent by M-TiO_(2) photocatalyst

作　　者：杨纯 李玥 陈国峰 周贵寅 刘四化 Yang Chun;Li Yue;Chen Guofeng;Zhou Guiyin;Liu Sihua(Hunan Key Laboratory of Biomedical Nanomaterials and Devices,Hunan University of Technology,Zhuzhou 412007;School of Materials and Chemical Engineering,Henan University of Engineering,Zhengzhou 450007)

机构地区：[1]湖南工业大学,生物医用纳米材料与器件湖南省重点实验室,株洲412007 [2]河南工程学院材料与化学工程学院,郑州450007

出　　处：《化工新型材料》2021年第8期210-214,共5页New Chemical Materials

基　　金：国家自然科学基金(52070078);河南省面上项目(212300410336);河南省高校科技创新人才(20HASTIT016);河南省科技攻关(202102310605)。

摘　　要：以四氯化钛为原料,采用一步水热法制备出具有介孔结构的二氧化钛(M-TiO_(2)),并对其光催化性能进行研究。比表面积(BET)分析得出M-TiO_(2)的孔径约为28nm,比表面积为59.554m^(2)/g,孔容体积为0.3678cm^(3)/g;光电性能测试结果表明,与商用催化剂P25相比,M-TiO_(2)带隙宽度窄,吸收范围宽,对光的利用能力更高,瞬时光电流强、电子传输阻力小、空穴电子对分离速度快;通过光催化降解亚甲基蓝(MB),其降解效率较高,在80min降解率能达到89%;通过研究M-TiO_(2)降解MB的作用机制,发现羟基自由基是降解的主要原因,空穴和超氧自由基起次要作用。A mesoporous titanium dioxide(M-TiO_(2))was synthesized by one-step hydrothermal method using titanium terrachlorid,and studied the photocatalytic performance of M-TiO_(2).The result of BET analysis showed that the pore size of M-TiO_(2) was about 28 nm,the specific surface area was 59.554 m^(2)/g,and the volume of entrance was0.3678 cm^(3)/g.Compared with commercial catalyst P25,the M-TiO_(2) possessed the narrower band gap,wider absorption range,higher utilization of visible light,stronger instantaneous light current,lower electron transmission resistance and faster separation speed of hole electron pairs.The results of photocatalytic degradation of methylene blue(MB)experiment shown that the degradation efficiency was as high as 89% in 80 minutes.The mechanism of M-TiO_(2) degradation of MB shown that the hydroxyl radical was the main substance for degradation,while hole and superoxide radical played a secondary role.

关 键 词：介孔二氧化钛 光催化 光电性能 降解 亚甲基蓝 

分 类 号：TQ151.6[化学工程—电化学工业]