Nitrogen-doped TiO _2 mesosponge layers formed by anodization of nitrogen-containing Ti alloys

摘要

An alloy containing 5 at.% of N was produced by arc melting of Ti and TiN powders. By anodization of the alloy in a 10 wt.% K _2HPO _4/glycerol electrolyte at 140 °, oxide mesosponge layers can be formed with thickness as up to several micrometers. X-ray photoelectron spectroscopy confirms nitrogen uptake in the oxide. Photoelectrochemical measurements show successful N-doping of these mesoporous anodic layers with a significant visible light photoresponse.