Double-Walled ZrO_2 Nanotube Array: Preparation and Enhanced Photocatalytic Activity

摘要

This work demonstrates the formation of self-ordered double-walled ZrO_2 nanotube array via electrochemical anodization in glycerol-based electrolyte. Compared with its counterpart of single-walled ZrO_2 nanotube array, the tube wall of double-walled ZrO_2 nanotube split into outer and inner layers for the decomposition of glycerol during anodization process. Moreover, the double-walled structure showed its advantage of achieving improved utilization of light and higher specific surface area of nanotube array. Due to the unique double-walled structure, the double-walled ZrO_2 nanotube array exhibited better photocatalytic activity than the single-walled ZrO_2 nanotube array.