NDLI: p-Type hydrogen sensing with Al- and V-doped TiO2 nanostructures.

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p-Type hydrogen sensing with Al- and V-doped TiO2 nanostructures.

Content Provider	Europe PMC
Author	Li, Zhaohui Ding, Dongyan Ning, Congqin
Copyright Year	2013
Abstract	Doping with other elements is one of the efficient ways to modify the physical and chemical properties of TiO2 nanomaterials. In the present work, anatase TiO2 nanofilms doped with Al and V elements were fabricated through anodic oxidation of Ti6Al4V alloy and further annealing treatment. Hydrogen sensing behavior of the crystallized Ti-Al-V-O nanofilms at various working temperatures was investigated through exposure to 1,000 ppm H2. Different from n-type hydrogen sensing characteristics of undoped TiO2 nanotubes, the Al- and V-doped nanofilms presented a p-type hydrogen sensing behavior by showing increased resistance upon exposure to the hydrogen-containing atmosphere. The Ti-Al-V-O nanofilm annealed at 450°C was mainly composed of anatase phase, which was sensitive to hydrogen-containing atmosphere only at elevated temperatures. Annealing of the Ti-Al-V-O nanofilm at 550°C could increase the content of anatase phase in the oxide nanofilm and thus resulted in a good sensitivity and resistance recovery at both room temperature and elevated temperatures. The TiO2 nanofilms doped with Al and V elements shows great potential for use as a robust semiconducting hydrogen sensor.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	8
PubMed Central reference number	PMC3570382
Issue Number	1
PubMed reference number	23311459
e-ISSN	1556276X
DOI	10.1186/1556-276x-8-25
Language	English
Publisher	Springer
Publisher Date	2013-01-12
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright ©2013 Li et al.; licensee Springer.
Subject Keyword	TiO2 Nanostructures Doping Hydrogen sensor p- type
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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