dc.contributor | Michel, C.R., Departamento de Física CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, Guadalajara, Jalisco 44410, Mexico; Delgado, E., Departamento de Física CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, Guadalajara, Jalisco 44410, Mexico; Martínez, A.H., Departamento de Física CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, Guadalajara, Jalisco 44410, Mexico | |
dc.creator | Michel, C.R. | |
dc.creator | Delgado, E. | |
dc.creator | Martinez, A.H. | |
dc.date.accessioned | 2015-11-19T18:49:42Z | |
dc.date.accessioned | 2022-11-02T14:22:58Z | |
dc.date.available | 2015-11-19T18:49:42Z | |
dc.date.available | 2022-11-02T14:22:58Z | |
dc.date.created | 2015-11-19T18:49:42Z | |
dc.date.issued | 2007 | |
dc.identifier | http://hdl.handle.net/20.500.12104/64731 | |
dc.identifier | 10.1016/j.snb.2007.02.031 | |
dc.identifier | http://www.scopus.com/inward/record.url?eid=2-s2.0-34447641609&partnerID=40&md5=5da96ba5e160e0e813015272283c3b4b | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4996952 | |
dc.description.abstract | Polycrystalline powders of bismuth cobaltite, Bi10Co16O38, with sillenite-type structure were prepared by solid-state reaction, solution and solution-polymerization methods, followed by calcination at 600 °C. By the solution-polymerization route, an aqueous solution containing metal nitrates, poly(vinyl alcohol) and sucrose was used to create a polymeric chain with the cations homogeneously distributed. After calcination, from X-ray powder diffraction patterns, an orthorhombic structure with space group Pmmm and cell parameters a = 7.2074 Å, b = 7.1497 Å and c = 5.0912 Å were calculated. The morphological observation of the samples by electron microscopy showed that the powders prepared by the solid-state reaction and solution processes had micron-sized grains, whereas by the solution-polymerization method, a nanostructured powder with an average particle size of 33 nm was obtained. Electrical measurements were performed on sintered thick-films of the powders obtained by the three synthesis routes, exhibiting a p-type semiconductor behavior. The gas responses of the Bi10Co16O38 sensors to O2 and CO2 were markedly improved with the nanostructured film. Besides, the dynamic change of resistance at 425 °C showed an increase of about 103 Ω when exposed to CO2, suggesting that the nanostructured Bi10Co16O38 is a good candidate for environmental gas sensing. © 2007 Elsevier B.V. All rights reserved. | |
dc.relation | Sensors and Actuators, B: Chemical | |
dc.relation | 125 | |
dc.relation | 2 | |
dc.relation | 389 | |
dc.relation | 395 | |
dc.relation | Scopus | |
dc.relation | WOS | |
dc.title | Evidence of improvement in gas sensing properties of nanostructured bismuth cobaltite prepared by solution-polymerization method | |
dc.type | Article | |