可见光响应的N-F共掺杂TiO_2纳米棒阵列的制备及其光催化性能的研究  

Preparation of visible light response N-F-codoped TiO_2 nanorod arrays and their photocatalytic performances

作　　者：吕燕[1] 傅正平[1] 杨碚芳[1] 

机构地区：[1]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《中国科学技术大学学报》2010年第7期727-733,共7页JUSTC

基　　金：中国科学技术大学青年创新基金资助

摘　　要：提出了一种制备可见光响应的N-F共掺杂TiO2纳米棒阵列(TNRAs)的方法.采用液相沉积法,以ZnO纳米棒阵列为模板,在玻璃基底上得到了N-F共掺杂的TiO2纳米棒阵列.采用SEM,TEM,Raman,XPS和UV-vis等分析手段,对不同温度下煅烧的样品进行了表征.以亚甲基蓝为模拟污染物,考察了催化剂在可见光区的催化活性.结果发现,N-F共掺杂明显地改善了TNRAs在可见光区的吸收;450℃煅烧的N-F共掺杂TNRAs样品显示最好的可见光活性,这归因于独特的一维纳米棒阵列结构和适量的N,F掺杂量所引起的协同效应.An efficient method for the preparation of visible light response N-F-codoped TiO2nanorod arrays（TNRAs）is reported.In the process,simultaneous nitrogen and fluorine doped TNRAs on the glass substrates were achieved by liquid phase deposition（LPD）method using ZnO nanorod arrays as templates.The as-prepared samples were characterized by SEM,TEM,Raman,XPS and UV-vis.The visible light photocatalytic activity of all samples was evaluated by photodegradation of methylene blue （MB）in aqueous solution.It was found that N-F codoping exhibits significant improvement of visible light absorption and the N-F-codoped TNRAs samples calcined at 450℃for 2hdemonstrate the best visible light activity in all samples.The excellent photocatalytic activity can be ascribed to the synergetic effect of the unique 1Dnanorod arrays structure and some beneficial effects induced by the appropriate amount of N and F doping in TNRAs.

关 键 词：液相沉积法 N-F共掺杂 TiO2纳米棒阵列 光催化 协同效应 

分 类 号：O472[理学—半导体物理]