000118732 001__ 118732
000118732 005__ 20240319081024.0
000118732 0247_ $$2doi$$a10.1088/1361-6528/ac6c93
000118732 0248_ $$2sideral$$a129672
000118732 037__ $$aART-2022-129672
000118732 041__ $$aeng
000118732 100__ $$aQuispe, L. T.
000118732 245__ $$aSynthesis and characterization of a-Fe2O3 nanoparticles showing potential applications for sensing quaternary ammonium vapor at room temperature
000118732 260__ $$c2022
000118732 5060_ $$aAccess copy available to the general public$$fUnrestricted
000118732 5203_ $$aP-Type and n-Type metal oxide semiconductors are widely used in the manufacture of gas sensing materials, due to their excellent electronic, electrical and electrocatalytic properties. Hematite (?-Fe2O3) compound has been reported as a promising material for sensing broad types of gases, due to its affordability, good stability and semiconducting properties. In the present work, the efficient and easy-To-implement sol-gel method has been used to synthesize ?-Fe2O3 nanoparticles (NPs). The TGA-DSC characterizations of the precursor gel provided information about the phase transformation temperature and the mass percentage of the hematite NPs. X-ray diffraction, transmission electron microscopy and x-ray photoelectron spectroscopy data analyses indicated the formation of two iron oxide phases (hematite and magnetite) when the NPs are subjected to thermal treatment at 400 °C. Meanwhile, only the hematite phase was determined for thermal annealing above 500 °C up to 800 °C. Besides, the crystallite size shows an increasing trend with the thermal annealing and no defined morphology. A clear reduction of surface defects, associated with oxygen vacancies was also evidenced when the annealing temperature was increased, resulting in changes on the electrical properties of hematite NPs. Resistive gas-sensing tests were carried out using hematite NPs + glycerin paste, to detect quaternary ammonium compounds. Room-Temperature high sensitivity values (S r ?4) have been obtained during the detection of 1/41 mM quaternary ammonium compounds vapor. The dependence of the sensitivity on the particle size, the mass ratio of NPs with respect to the organic ligand, changes in the dielectric properties, and the electrical conduction mechanism of gas sensing was discussed.
000118732 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000118732 590__ $$a3.5$$b2022
000118732 592__ $$a0.705$$b2022
000118732 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b170 / 343 = 0.496$$c2022$$dQ2$$eT2
000118732 591__ $$aPHYSICS, APPLIED$$b54 / 160 = 0.338$$c2022$$dQ2$$eT2
000118732 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b67 / 107 = 0.626$$c2022$$dQ3$$eT2
000118732 593__ $$aMechanical Engineering$$c2022$$dQ1
000118732 593__ $$aChemistry (miscellaneous)$$c2022$$dQ2
000118732 593__ $$aElectrical and Electronic Engineering$$c2022$$dQ2
000118732 593__ $$aNanoscience and Nanotechnology$$c2022$$dQ2
000118732 593__ $$aMechanics of Materials$$c2022$$dQ2
000118732 593__ $$aBioengineering$$c2022$$dQ2
000118732 593__ $$aMaterials Science (miscellaneous)$$c2022$$dQ2
000118732 594__ $$a6.7$$b2022
000118732 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000118732 700__ $$aMamani, L. G. L.
000118732 700__ $$aBaldárrago Alcántara, A. A.
000118732 700__ $$aFélix, L. L.
000118732 700__ $$0(orcid)0000-0003-1558-9279$$aGoya, Gerardo F.$$uUniversidad de Zaragoza
000118732 700__ $$aFuentes García, J. A.
000118732 700__ $$aPacheco Salazar, D.
000118732 700__ $$aCoaquira, J. A. H.
000118732 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000118732 773__ $$g33, 33 (2022), 335704 [13 pp.]$$pNanotechnology$$tNanotechnology$$x0957-4484
000118732 8564_ $$s2286893$$uhttps://zaguan.unizar.es/record/118732/files/texto_completo.pdf$$yVersión publicada
000118732 8564_ $$s1178168$$uhttps://zaguan.unizar.es/record/118732/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000118732 909CO $$ooai:zaguan.unizar.es:118732$$particulos$$pdriver
000118732 951__ $$a2024-03-18-16:30:00
000118732 980__ $$aARTICLE