Abstract

The anodic growth conditions of titania with a tubular structure are investigated. We propose a mechanism of anodic growth of tubular titania, which presupposes that electrochemical oxidation of titanium is predominantly confined to the bottom of pores in a barrier layer, i.e., where the anodic current density is higher, which causes a temperature rise in these regions. As the barrier layer temperature exceeds a certain threshold, the structure of growing oxide changes from the commonly obtained porous honeycomb-like structure to a tubular one. The proposed mechanism is supported by experimental results.

中文翻译：

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管状二氧化钛阳极生长机理

摘要

研究了具有管状结构的二氧化钛的阳极生长条件。我们提出了一种管状二氧化钛的阳极生长机理，该机理的前提是钛的电化学氧化主要局限于阻挡层中孔的底部，即阳极电流密度较高，从而导致这些区域的温度升高。当阻挡层温度超过一定阈值时，生长的氧化物的结构从通常获得的多孔蜂窝状结构变为管状。实验结果支持了所提出的机制。