TiO_2纳米管的“兼并”现象及机理分析  

Formation Mechanism of Merger of Titania Nanotube Arrays via Anodization

作　　者：杨硕[1] 刘冠鹏[1] 刘喜波[1] 薛建强[1] 张雪凤[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2011年第6期37-41,52,共6页Development and Application of Materials

摘　　要：采用电化学阳极氧化法制备了高度有序TiO2纳米管阵列,并提出纳米管"兼并"的概念。结合FE-SEM分析并验证了Macak等人提出的pH值梯度理论,并在此基础上用双电层理论解释了"兼并"的形成机理,同时解释了初期纳米管管径进一步增大的原因。In this article, highly ordered TiO2 nanotube arrays were prepared by electrochemical anodization. The concept of ＇ mergers＇ was proposed, pH gradient theory put forward by Macak was verified with SEM images and the formation mechanism of ＇ mergers＇ of titania nanotubes was explained by the effect of electric double layer. The reasons of the further augment of original nanotubes diameters were also analyzed.

关 键 词：阳极氧化 TIO2纳米管 纳米管的“兼并” pH值梯度 双电层效应 

分 类 号：O646[理学—物理化学]