乙二醇电解液阳极氧化法制备TiO_2纳米管  

TiO_2 Nanotube Perpared by Anodic Oxidation in Ethylene Glycol Electrolyte

作　　者：朱伟庆[1] 王树林[1] 刘杰[1] 高乾[1] 王海峰[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《机械工程材料》2011年第1期76-78,共3页Materials For Mechanical Engineering

摘　　要：以NH4F/乙二醇为电解液对钛箔进行阳极氧化制备TiO2纳米管;采用XRD和SEM研究了退火前后TiO2纳米管的物相结构和形貌。结果表明:制备的TiO2纳米管主要为无定形态TiO2相,经450℃退火3 h后,大部分转变为锐钛矿相和少量的金红石相,晶粒生长良好;TiO2纳米管的外径为200 nm,壁厚为30 nm,管壁光滑,经退火后形状几乎没有变化;TiO2纳米管的生成经历了致密氧化层的形成、多孔层的形成以及纳米管的形成与稳定生长三个阶段,是场致氧化、场致溶解和化学溶解三个反应共同作用并逐步达到动态平衡的结果。TiO2 nano tubes（NT） were prepared by anodic oxidation in ethylene glycol and NH4F electrolyte.The phase structure and morphology of the TiO2 NT before and after annealed were analyzed by means of XRD and SEM.The results show that most of the prepared TiO2 NT were composed of amorphous state TiO2 phase which transformed into anatase and little rutile after annealed at 450 ℃ for 3 h and the grains grew well.The TiO2 NT with smooth wall had 200 nm in diameter and 30 nm in wall thickness,and the annealing didn＇t destroy its shape.The formation of TiO2 NT experienced 3 steps including dense oxide layer formation,porous layer formation and formation and stable growth of the NT.The formation process was resulted from the joint effects of field induced oxidation,field induced dissolution and chemical dissolution,that approached a dynamic balance gradually.

关 键 词：TIO2纳米管 阳极氧化法 乙二醇 

分 类 号：TB321[一般工业技术—材料科学与工程]