X射线光电子能谱
二氧化钛
锐钛矿
电化学
纳米管
水溶液
电极
材料科学
钛
阳极
离子
化学工程
无机化学
化学
纳米技术
光催化
催化作用
物理化学
冶金
有机化学
碳纳米管
工程类
作者
Yingying Liu,Shangbin Sang,Qiong Wu,Zhouguang Lu,Kaiyu Liu,Hongtao Liu
标识
DOI:10.1016/j.electacta.2014.08.016
摘要
The titanium dioxide nanotube array (TiO2-NTA) is prepared by a two-step anodic oxidation method and annealed at 450 ∘C subsequently. The Al-inserted TiO2-NTA is prepared by polarizing the TiO2-NTAs electrode at 0.4 mA for 2 min in 1 mol/L AlCl3. The results show that the Al-inserted sample still remains pure anatase TiO2 phase (by XRD) and keeps intact nanotube array structure (by FE-SEM). The X-ray photoelectron spectroscopy (XPS) analysis indicates that the insertion of Al3+ into TiO2-NTAs facilitates in the reduction of Ti4+ to Ti3+. Electrochemical investigation on the Al3+ insertion process reveals that presence of Cl− ions plays vital role for the effective insertion and de-insertion of Al3+ into/from the TiO2-NTA.
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