摘要
采用阳极氧化法在纯钛表面制备了5组平均内径不同以及5种管长不同的TiO2纳米管阵列薄膜,应用SEM对管径进行了表征.将之烧结成锐钛矿型后通过光催化降解甲基橙溶液研究管径与管长的大小对其光催化活性的影响,通过重复催化实验研究其重复使用的效果.结果表明:管径为100nm时催化剂催化降解甲基橙的效果最好,管长则基本不影响纳米管薄膜的催化活性.重复催化实验表明,TiO2纳米管薄膜有很好的重复使用效果.
Five groups of TiO2 nanotube array films with different inner diameters and five groups with different tube lengths were fabricated on titanium by anodization.Morphology was analyzed by scanning electron microscope.The photocatalytic activity of the TiO2 nanotube films crystallized into anatase,was evaluated by the decolorization of methyl orange in aqueous solution under UV light irradiation.The effects of the nanotube diameter and length on the photocatalytic activity were investigated.The reusability of photocatalyst was evaluated through repeated photocatalytic reaction experiment.Results suggest that the TiO2 nanotube films with the diameter of 100nm exhibit the best photocatalytic activity to the degradation of methyl orange,and the length of nanotube has little effect on the photocatalytic activity.Repeated photocatalytic reaction experiment shows that the TiO2 nanotube films have excellent resuability as photocatalyst.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第9期916-920,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50871093)
教育部高等学校全国优秀博士学位论文作者专项基金(200554)~~
关键词
TIO2纳米管
阳极氧化
光催化
管径
TiO2 nanotube
anodic oxidation
photocatalytic activity
nanotube diameter
