分子印迹型纳米TiO_2材料的制备及其光催化选择性能的研究  

Synthesis and photocatalytic properties of molecule imprinted TiO_2

作　　者：王嘉楠[1] 李媛媛[1] 倪刚[1] 李玲玲[1] 

机构地区：[1]宁夏大学化学化工学院,银川750021

出　　处：《化工新型材料》2015年第11期49-51,共3页New Chemical Materials

基　　金：国家自然科学基金资助项目(21067010;21365016);宁夏高校科学研究基金项目(2012);宁夏大学提升综合实力建设项目(8016-18)

摘　　要：以中性红(NR)为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,TiO2为载体,采用表面聚合的方法制备了分子印迹型TiO2光催化剂(MIP-TiO2)。利用X射线衍射、扫描电子显微镜、傅里叶红外光谱和热重等对MIP-TiO2的结构与性能进行了表征,并考察其对NR等底物的光催化选择性能。结果表明:与非印迹型光催化剂(NIP-TiO2)相比,当降解含有NR的底物时,MIP-TiO2具有明显的选择催化效应,其对NR的降解率为NIP-TiO2的2.8倍;而在降解其他底物时,2者的光催化活性相似。且MIP-TiO2具有较好的稳定性,重复使用5次后,其对NR的降解率变化不大,变化幅度在7.4%以内。Molecule imprinted TiO2photocatalysts（MIP-TiO2）were prepared by surface polymerization method with neutral red as template molecule,methacrylic acid as functional monomer,ethylene glycol dimethacrylate as cross-linker and TiO2 as carrier.The structures and properties of MIP-TiO2 were characterized by X-ray diffraction,scanning electron microscope,thermogravimetry and infrared spectroscopy.Photocatalyzed degradation of neutral red and/or other substrates by using MIP-TiO2 catalyst was studied.The results revealed that over the MIP-TiO2,the degradation rate of neutral red was markedly higher than that of NIP-TiO2,and the MIP-TiO2 exhibited selective catalytic activity for the photocatalyzed degradation of target-substrate molecules.When degrading non-target-substrate molecules,the MIP-TiO2 exhibited a similar activity with the non-imprinted catalyst.The MIP-TiO2 had high stability,and after the catalyst was used 5times,the rangeability of degradation rate of neutral red within 7.4%.

关 键 词：分子印迹 TIO2 光催化 中性红 

分 类 号：O614.411[理学—无机化学] O643.36[理学—化学]