光催化制备结晶TiO_2介孔薄膜及其性能表征(英文).pdf

硅酸盐学报· 158 ·2010年光催化制备结晶TiO2介孔薄膜及其性能表征申乾宏1,2,黎胜1,宗建娟1,杨辉1,2(1. 浙江大学材料科学与工程学系,杭州 310027;2. 浙江加州国际纳米技术研究院,杭州 310029) 摘要:提出了一种在室温条件下制备结晶TiO介孔薄膜的简便方法。首先采用含有罗丹明B的TiO纳米晶溶胶通过浸渍提拉制备结晶TiO薄膜,然后将薄膜置于紫外灯下照射,通过TiO薄膜自身的光催化作用将薄膜中的罗丹明B分解去除,从而形成介孔薄膜。分别采用X射线衍射仪、扫描电子显微镜和透射电子显微镜对样品进行了表征,并考察了薄膜对水的接触角及光催化活性。结果表明:所制备的TiO介孔薄膜由30~50nm的纳米粒子组成,其晶型为锐钛矿–板钛矿–金红石混晶;适当的罗丹明B添加量有利于介孔形成;由于介孔的作用,TiO介孔薄膜的亲水性及光催化活性相对于致密TiO薄膜有显著提高。关键词:氧化钛;薄膜;介孔;罗丹明B;室温制备;亲水性;光催化作用中图分类号:O643 文献标志码:A 文章编号:0454–5648(2010)01–0158–05 PREPARATION AND CHARACTERIZATION OF MESOPOROUS TITANIA CRYSTALLINE FILM VIA PHOTOCATALYSIS SHEN Qianhong1,2,LI Sheng1,ZONG Jianjuan1,YANG Hui1,2(1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027; 2. Zhejiang California International NanoSystems Institute, Hangzhou 310029, China) Abstract: A facile route was proposed to fabricate mesoporous titania (TiO2) crystalline films at room temperature. The film was prepared by using a nano-crystalline TiO2 sol with rhodamine B by a dip-coating method. Rhodamine B as a template could be elimi-nated from the film through photocatalytic degradation induced by nano-crystalline TiO2 under ultraviolet irradiation, and thus the mesopores were formed. The products were characterized by X-ray diffraction, scanning electron microscopy and transmission elec-tron microscopy. The contact angle and photocatalytic activity were also i