Anodic Alumina Membranes as Template for the Synthesis of 1-D Metal Oxide and Hydroxide Nanostructures

摘要

Anodic alumina membranes with highly ordered cylindrical pores and tuneable geometry have been prepared (pore diameters=20-200 nm; pore density 1012-1014 pores/m{sup}2; thickness: 20-100 mm) by controlling the anodizing process of aluminum in phosphoric, oxalic and sulphuric acid. The influence of different parameters (initial treatment of aluminium surface, composition of electrolyte, temperature and applied potential) on the final characteristics of the membranes have been investigated. The use anodic alumina membranes as template for the electrosynthesis of some metal hydroxides and oxides 1-D nanostructures (nanowires and nanotubes) will be also proved.