Fabrication and investigation of gas sensing properties of Nb-doped TiO(2) nanotubular arrays.
Nanotechnology
; 23(23): 235706, 2012 Jun 15.
Article
em En
| MEDLINE
| ID: mdl-22595952
ABSTRACT
Synthesis of Nb-containing titania nanotubular arrays at room temperature by electrochemical anodization is reported. Crystallization of pure and Nb-doped TiO(2) nanotubes was carried out by post-growth annealing at 400°C. The morphology of the tubes obtained was characterized by scanning electron microscopy (SEM). Crystal structure and composition of tubes were investigated by glancing incidence x-ray diffraction (GIXRD) and total reflection x-ray fluorescence (TXRF). For the first time gas sensing characteristics of Nb-doped TiO(2) nanotubes were investigated and compared to those of undoped nanotubes. The functional properties of nanotubular arrays towards CO, H(2), NO(2), ethanol and acetone were tested in a wide range of operating temperature. The introduction of Nb largely improves conductivity and enhances gas sensing performances of TiO(2) nanotubes.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Titânio
/
Transdutores
/
Nanoestruturas
/
Gases
/
Nióbio
Idioma:
En
Revista:
Nanotechnology
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Itália