在AAO模板上用溶胶—凝胶法制备TiO_2纳米管阵列  

Synthesis of TiO_2 array nanotubes by sol-gel method based on the anodic aluminum oxide template

作　　者：华丽[1] 张洪权[1] 段连生[1] 戴月[1] 胡庆兰[1] 

机构地区：[1]湖北第二师范学院化学与生命科学学院,武汉430205

出　　处：《兰州大学学报（自然科学版）》2016年第2期266-270,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(51171068);湖北省高等学校优秀中青年科技创新团队建设计划项目(T201225);湖北省重点实验室建设项目;湖北省教育厅教学研究项目(2012385)

摘　　要：用二次阳极氧化法在草酸电解液中制备出有序多孔阳极氧化铝(AAO)模板,采用溶胶-凝胶法在负压辅助条件下用钛酸四丁脂Ti(OC_4H_9)_4为TiO_2前驱体溶胶浸渍AAO模板,450℃下热处理制备长度和孔径可控的TiO_2纳米管的阵列结构.剥离去除模板后,用FE-SEM、XRD对产物形貌、晶型进行表征和分析.结果表明,制备的TiO_2纳米管长约3μm,外径130 nm,内径100 nm,与AAO模板的孔径相当,且单根TiO_2纳米管分散性较好,管与管之间无团聚,说明负压辅助可提高TiO_2纳米管的连续性.XRD分析显示,TiO_2纳米管呈锐钛矿相晶型.The ordered multiporous array structure of anodic aluminum oxide（AAO）,which was used as a template for preparing the array structures of TiO_2 nanotubes,was successfully obtained by the two step anodization method in oxalic acid electrolyte.The tetrabutyl titanate（Ti（OC_4H_9）_4） sol solution as the titania precursor was employed to impregnate the above-mentioned AAO templates in a negative pressure-assisted condition;the array structures of TiO_2 nanotubes with some controllable lengths and diameters were formed by the sol-gel method after heat treatment of 450 ℃.AAO templates were removed by using the inverse electric stripping method.FE- SEM and XRD technologies were employed to analyze the morphology and crystals of products and the results showed the length of the prepared TiO_2 being about 3 μm,the outer diameter 130 nm and the inner diameter 100 nm,which were consistent with the diameters of AAO templates.The dispersion of the obtained TiO_2 nanotubes was good,and there was no agglomeration among the tubes owing to a negative pressureassisted impregnation that improved the continuity among TiO_2 nanotubes.XRD analysis showed that the TiO_2 nanotubes are of anatase crystal type,which have potential applications in photocatalysis and solar cell electrodes.

关 键 词：TiO_2纳米管阵列 溶胶-凝胶法 多孔阳极氧化铝 模板 

分 类 号：O614[理学—无机化学]