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Nanostructured (Sn,Ti, Nb)O2 Solid Solution for Hydrogen Sensing

Published online by Cambridge University Press:  01 February 2011

Maria Cristina Carotta ,
Michele Benetti ,
Vincenzo Guidi ,
Sandro Gherardi ,
Cesare Malagu' ,
Beatrice Vendemiati  and
Giuliano Martinelli
Maria Cristina Carotta
Affiliation:
carotta@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, N/A, 44100, Italy, 00390532974230, 00390532974210
Michele Benetti
Affiliation:
benetti@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
Vincenzo Guidi
Affiliation:
guidi@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
Sandro Gherardi
Affiliation:
gherardi@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
Cesare Malagu'
Affiliation:
malagu@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
Beatrice Vendemiati
Affiliation:
vendemiati@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
Giuliano Martinelli
Affiliation:
martinelli@fe.infn.it, University of Ferrara, Physics Department, Via Saragat 1/C, Ferrara, n/a, 44100, Italy
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Abstract

A novel co-precipitation route for preparing pure nanograined (Ti, Sn, Nb)O2 solid solution has been accomplished. The solid solution containing the three elements has been synthesized with the molar ratios for Sn:Ti:Nb 100:42:5. Electron microscopy and X-ray diffraction have been adopted to observe the morphology, the crystalline structure and the mean grain radius. Calcining at 550, 650, 850 or 1050 °C for 2h, showed rutile-like single-phase.

The prepared powders have been deposited to produce gas sensors in form of thick films through screen-printing technology. SEM micrographs of both powders and films showed regularly-shaped particles with grain dimensions at nanometric level, the nanostructure being maintained up to 1050°C. The sensors have been tested with different reducing gases showing large responses to hydrogen and good selectivity.

Keywords

semiconductingsensornanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 915: Symposium R – Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications , 2006 , 0915-R07-10
Copyright
Copyright © Materials Research Society 2006

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