摘要
为了探索二氧化钛(TiO_2)纳米管的可控生长,以氟化铵与乙二醇的混合溶液为电解液,采用电化学阳极氧化法在钛片上制备TiO_2纳米管阵列。通过扫描电子显微镜、X射线衍射分析仪和X射线光电子分析仪分别对TiO_2纳米管的微观形貌、晶体结构和元素组成进行表征分析。结果表明,电化学阳极氧化法可以制备出排列整齐、分布均匀的TiO_2纳米管。随着氧化时间的增长,其外径变化不大、内径略有增大、管壁变薄、管长增加;在一定氧化电压范围内,TiO_2纳米管的外径随氧化电压的增大而增大。通过控制氧化时间和氧化电压可实现TiO_2纳米管的可控生长。经450℃退火处理2h后,TiO_2纳米管为锐钛矿相晶体结构并且沿[101]择优取向。
In order to investigate the controllable growth of TiO2 nanotubes,the TiO2 nanotube arrays are prepared on titanium foil with electrochemical anodic oxidation method using the mixed solution of ammonium fluoride solution and ethylene glycol as raw materials.The micro morphologies,structures and element composition of the samples were characterized by SEM,XRD and XPS,respectively.Results show that TiO2 nanotube arrays with regular arrangement and uniform distribution can be prepared by electrochemical anodic oxidation method.The inner diameter and length of TiO2 nanotubes are increased,while the wall thickness is decreased and the change of outer diameter would be ignored with increasing oxidation time.The outer diameter of TiO2 nanotubes increases with increasing oxidation voltage within a certain range.Therefore,the controllable growth of TiO2 nanotubes can be achieved by controlling the oxidation time and oxidation voltage.Besides,TiO2 nanotubes with preferred orientation[101]are anatase phase structure after annealing at 450℃for 2hours.
出处
《西安邮电大学学报》
2017年第1期83-87,共5页
Journal of Xi’an University of Posts and Telecommunications
基金
陕西省教育厅科学研究计划资助项目(16JK1693)
西安邮电大学研究生创新基金资助项目(114-602080114)
