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Characterization and butanol/ethanol sensing properties of mixed tungsten oxide and copper tungstate films obtained by spray-sol-gel

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dc.contributor.author Damián M.A. es_PE
dc.contributor.author Rodriguez Y. es_PE
dc.contributor.author Solis J.L. es_PE
dc.contributor.author Estrada W. es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2003
dc.description This work has been financially supported by the International Program for Physical Science of Uppsala University (IPPS), the Instituto de Investigación of Universidad Nacional de Ingenieria, and CONCYTEC (Peruvian Research Council).
dc.description.abstract Mixed WO3-CuWO4 films have been prepared from an aqueous solution of copper sulfate and polytungsten gel with a molar ratio of Cu/W from 0 to 100%. These solutions were sprayed on to alumina substrates at 220 °C. The obtained films were amorphous and crystallized after annealing at 300 °C in air for 3 h. The annealed films were composed of a mixture of CuWO4 and WO3 phases. The film obtained from a solution with an equimolar ratio of Cu/W was pure CuWO4. The pure WO 3 films obtained have high surface 'irregularities', such as porosity. These surface 'irregularities' in the films were maintained or even increased as Cu/W molar ratio augments in the starting solution up to 10%. The gas sensitivity to butanol and ethanol vapors is also enhanced when the CuWO4 phase increases in the film by up to 7-10%; with further increments to this proportion the detection sensitivity decreases, so compromises are approximately 7-10%. The gas sensitivity of pure CuWO 4 was lower than that of pure WO3.
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.doi https://doi.org/10.1016/S0040-6090(03)01048-4
dc.identifier.scopus 2-s2.0-0142106811
dc.identifier.uri https://hdl.handle.net/20.500.12390/764
dc.language.iso eng
dc.publisher Elsevier BV
dc.relation.ispartof Thin Solid Films
dc.rights info:eu-repo/semantics/openAccess
dc.subject Tungsten compounds
dc.subject Copper compounds es_PE
dc.subject Ethanol es_PE
dc.subject Sol-gels es_PE
dc.subject Spraying es_PE
dc.subject Sensing properties es_PE
dc.subject Thin films es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.04.02
dc.title Characterization and butanol/ethanol sensing properties of mixed tungsten oxide and copper tungstate films obtained by spray-sol-gel
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
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oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
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