Lehnen, Thomas, Valldor, Martin, Niznansky, Daniel ORCID: 0000-0001-5740-1604 and Mathur, Sanjay
(2014).
Hydrothermally grown porous FeVO4 nanorods and their integration as active material in gas-sensing devices.
J. Mater. Chem. A, 2 (6).
S. 1862 - 1869.
CAMBRIDGE:
ROYAL SOC CHEMISTRY.
ISSN 2050-7496
Abstract
Controllable fabrication of highly porous iron vanadate (FeVO4) thick film consisting of disordered nanorods suitable for gas penetration and permeation was achieved by hydrothermal synthesis of fervanite-like FeVO4 center dot 1.1H(2)O. The subsequent dehydration to FeVO4 was investigated by Fe-57 Mossbauer spectroscopy (DQS), DTA, magnetic susceptibility (c) and electron microscopy (REM/TEM). Their integration in gas sensing devices as porous layer via polymer-blended (PVDF) doctor-blading approach was successfully demonstrated followed by investigations of their electric properties and oxygen sensing capability. The probed I-U behaviour and UV-Vis measurements confirmed the semiconducting nature of triclinic FeVO4 (E-g = 2.72 eV) and exhibited an activation energy for electric conduction of 0.46 eV. The best sensitivity of 0.29 +/- 0.01 (m = -3.4 +/- 0.1) could be obtained at an optimal working temperature of 250 degrees C.
Item Type: | Journal Article | ||||||||||||||||||||
Creators: |
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URN: | urn:nbn:de:hbz:38-452434 | ||||||||||||||||||||
DOI: | 10.1039/c3ta12821k | ||||||||||||||||||||
Journal or Publication Title: | J. Mater. Chem. A | ||||||||||||||||||||
Volume: | 2 | ||||||||||||||||||||
Number: | 6 | ||||||||||||||||||||
Page Range: | S. 1862 - 1869 | ||||||||||||||||||||
Date: | 2014 | ||||||||||||||||||||
Publisher: | ROYAL SOC CHEMISTRY | ||||||||||||||||||||
Place of Publication: | CAMBRIDGE | ||||||||||||||||||||
ISSN: | 2050-7496 | ||||||||||||||||||||
Language: | English | ||||||||||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences | ||||||||||||||||||||
Divisions: | Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry | ||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||
Uncontrolled Keywords: |
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Refereed: | Yes | ||||||||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/45243 |
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