SnO2/MoO3-nanostructure and alcohol detection

• Published in: Sensors and actuators. B, Chemical Vol. 118; no. 1-2; pp. 156 - 162
• Main Authors: Arbiol, J, Morante, J R, Bouvier, P, Pagnier, T, Makeeva, E A, Rumyantseva, M N, Gaskov, A M
• Format: Journal Article
• Language: English
• Published: Elsevier 25.10.2006
• Subjects: Actuators; Alcohols; Chemical Sciences; Detection; Evolution; Material chemistry; Nanocomposites; Sensors; Tin dioxide; Tin oxides; Nanometal oxide binary systems; Surface acidity; Semiconductor gas sensor; EELS; Raman; SnO2/MoO3; HRTEM
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2006.04.021

SnO2/MoO3 mixed samples from 0 to 100mol% MoO3 have been prepared by using the sol-gel method and calcined at 500°C during 24h. The sensor response of the samples towards alcohols, CnH2n+1OH (n=1-4), and NH3 will be interpreted in terms of the acid-base properties of the nanocomposites. To support it, a detailed high-resolution transmission electron microscopy, electron energy loss spectroscopy and RAMAN analysis have been performed allowing to determine the structural, morphological and compositional evolution of this nanostructured binary system. The change on the sensing characteristics related with the Mo content on samples is explained attending to these analytical characterization results that point out the presence of Mo2O3 in the very small grain of SnO2, about 2.5nm, before their segregation in determining the sensing characteristics.