可见光响应Pr^3＋：Y2SiO5/TiO2薄膜的制备  

Preparation of Visible Light Response Pr^(3+):Y_2SiO_5/TiO_2 Composite Film

作　　者：王亚淼 徐萌川 杨毅[1,2] 焦岩[2] 刘颖[1] 颜学武[1] 

机构地区：[1]南京理工大学环境与生物工程学院,南京210094 [2]南京信息工程大学环境科学与工程学院,江苏省环境净化材料工程技术研究中心,南京210044

出　　处：《装备环境工程》2016年第6期1-4,共4页Equipment Environmental Engineering

基　　金：国家自然科学基金(11205089);中央高校基本科研业务费专项资金(30915011309);江苏省产学研联合创新资金(BY2016004-02)

摘　　要：目的研究层涂法制备Pr^(3+):Y_2SiO_5/TiO_2复合薄膜的结构与可见光催化性能。方法分别以钛酸丁酯(TBOT)和正硅酸乙酯(TEOS)为前驱体,通过溶胶-凝胶法制得TiO_2凝胶和Pr掺杂的Y_2SiO_5凝胶,以碳纤维为薄膜载体,并通过浸渍提拉法制备Pr^(3+):Y_2SiO_5/TiO_2层涂薄膜,研究层涂法制备复合薄膜对复合薄膜结构、形貌以及光催化效果的影响。结果复合薄膜具有明显的分层界限,形貌较平整,有较少龟裂;复合薄膜性能受涂覆次序的影响较大。结论依次将Pr^(3+):Y_2SiO_5和TiO_2涂覆在碳纤维上的复合薄膜具有较好的光催化性能,可见光光照2 h,对亚甲基蓝的脱色率达到94%,其可见光催化效率高于TiO_2薄膜的59%。Objective To study structure and visible light catalytic property of Pr^3＋：Y2SiO5/TiO2 composite membrane prepared by the layer coating method. Methods Butyl titanate（TBOT） and ethyl orthosilicate（TEOS） were taken as precursor to prepare Pr doping Y2 SiO5 gel and TiO2 gel by the sol-gel method. The carbon fiber was taken as the film carrier to prepare Pr^3＋：Y2SiO5 /TiO2 layer of coating film by the dip-coating method. Influences of the composite membrane prepared by layer coating on structure, morphology and photocatalytic performance of composite membrane were studied. Results Composite film had obvious stratification, smooth topography, and few fractures. Performance of composite film was strongly influenced by the coating sequence. Conclusion Composite membranes with carbon fiber being coated with Pr^3＋：Y2SiO5 and TiO2 in sequence have good photocatalytic performance. The decolourization ratio of methylene blue decolorization can reach 94% after two hours of visible light radiation; its visible light catalytic efficiency is higher than 59% of TiO2 thin film.

关 键 词：Pr3+:Y2SiO5/TiO2 复合薄膜 溶胶-凝胶 可见光催化 亚甲基蓝降解 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术]