Large surface area biphase titania for chemical sensing

•Stable biphase Nb–TiO2 nanotubes were synthesized by means of electrochemical anodization at room temperature followed by thermal annealing.•Absorption–desorption mechanism in presence of reducing gases leading to the changes in the conductance of nanosized TiO2 was studied.•Obtained structures sho...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2015-03, Vol.209, p.1091-1096
Main Authors: Galstyan, Vardan, Comini, Elisabetta, Baratto, Camilla, Ponzoni, Andrea, Ferroni, Matteo, Poli, Nicola, Bontempi, Elza, Brisotto, Mariangela, Faglia, Guido, Sberveglieri, Giorgio
Format: Article
Language:English
Subjects:
Anodization
Anodizing
Chemical sensor
Ethyl alcohol
Gas sensors
Nanostructure
Nanotubes
Operating temperature
Surface area
TiO2 nanotubes
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Stable biphase Nb–TiO2 nanotubes were synthesized by means of electrochemical anodization at room temperature followed by thermal annealing.•Absorption–desorption mechanism in presence of reducing gases leading to the changes in the conductance of nanosized TiO2 was studied.•Obtained structures show high and reversible response towards H2, CO, acetone and ethanol over a wide range of the operating temperatures. In this work we report about the synthesis and gas sensing properties of large surface area and stable biphase titania nanotubes. The nanosized tubular structures have been obtained by means of electrochemical anodization of thin Nb–Ti metallic films. Crystallization was accomplished by thermal annealing, to obtain biphase titania. The morphological analysis shows that the obtained structures are well-ordered and highly aligned titania nanotubes. Investigations of the structures’ gas sensing properties show that they have high and reversible response towards H2, CO, acetone and ethanol over a wide range of the operating temperatures.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2014.12.027