An atomic layer deposited, conformal thin layer (∼15 nm) of amorphous TiO2 on a primary TiO2 NT array is effectively converted into partly crystalline nanoparticles on the inside walls of TiO2 nanotubes by water mediated dissolution-precipitation phenomena without disturbing the original state of the TNTAs. This method helps to achieve the exclusive conversion of the secondary shell of amorphous TiO2 layer coated by ALD into nanoparticles and the preservation of original crystalline nanotube (core) properties such as mechanical stability and the charge transport properties. As a consequence, the resultant core-shell type nanotube-nanoparticle composite showed higher photoanode performance (25% increment in efficiency) than conventional untreated TiO2 NT array photoanode.
|Number of pages||6|
|Journal||Journal of Materials Chemistry A|
|Publication status||Published - 7 Apr 2013|
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)