N-Doped lepidocrocite nanotubular arrays: Hydrothermal formation from anodic TiO2 nanotubes and enhanced visible light photoresponse

Authors

Tomohiko Nakajima, University of Erlangen-Nuremberg
Chong-Yong Lee, University of Erlangen-NurembergFollow
Yang Yang, University of Erlangen-Nuremberg
Patrik Schmuki, University of Erlangen-Nuremberg

RIS ID

104331

Publication Details

Nakajima, T., Lee, C., Yang, Y. & Schmuki, P. (2013). N-Doped lepidocrocite nanotubular arrays: Hydrothermal formation from anodic TiO2 nanotubes and enhanced visible light photoresponse. Journal of Materials Chemistry A, 1 (5), 1860-1866.

Abstract

New Cs-lepidocrocite nanotubular arrays were successfully prepared from anodically grown TiO2 nanotubes by hydrothermal conversion using CsOH in a water-ethanol mixed solvent. The obtained open nanotubular structure consists of plate-like nano-crystals, reflecting a preferred facet growth of the lepidocrocite with a 2-dimensional layered crystal structure. N-Doping of the Cs-lepidocrocite nanotubular layer was carried out by annealing in NH 3 gas. The N-doped sample showed an incident photon to current conversion efficiency (IPCE) of 1.43% at 450 nm, which is 57% higher than conventional N-doped anatase TiO2 nanotubes. 2013 The Royal Society of Chemistry.