Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method

In this work, the effects of Fe-doping on structural and gas-sensing properties of CaCu3Ti4O12 (CCTO) thin film prepared by a sol-gel method were systematically studied. Sol-gel-derived CCTO thin films with different Fe-doping concentrations were deposited on alumina substrates by spin-coating and A...

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Autores principales:	Pongpaiboonkul, S., Phokharatkul, D., Hodak, J.H., Wisitsoraat, A., Hodak, S.K.
Formato:	JOUR
Materias:	Fe-doped CaCu3Ti4O12 H2S sensor Metal oxide thin films Sol-gel Alumina Chemical detection Chemical sensors Doping (additives) Energy dispersive spectroscopy Field emission microscopes Film preparation Gas detectors Gas sensing electrodes Gold Gold deposits Metals Oxide films Photoelectron spectroscopy Photolithography Scanning electron microscopy Semiconductor doping Sol-gel process Sol-gels X ray absorption X ray absorption near edge structure spectroscopy X ray diffraction X ray spectroscopy Fe-doped Field emission scanning electron microscopy Gas sensing mechanism Gas sensing properties Inter-digitated electrodes Operating temperature X ray absorption near edge structure Thin films
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09254005_v224_n_p118_Pongpaiboonkul
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_09254005_v224_n_p118_Pongpaiboonkul2023-10-03T15:46:15Z Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method Pongpaiboonkul, S. Phokharatkul, D. Hodak, J.H. Wisitsoraat, A. Hodak, S.K. Fe-doped CaCu3Ti4O12 H2S sensor Metal oxide thin films Sol-gel Alumina Chemical detection Chemical sensors Doping (additives) Energy dispersive spectroscopy Field emission microscopes Film preparation Gas detectors Gas sensing electrodes Gold Gold deposits Metals Oxide films Photoelectron spectroscopy Photolithography Scanning electron microscopy Semiconductor doping Sol-gel process Sol-gels X ray absorption X ray absorption near edge structure spectroscopy X ray diffraction X ray spectroscopy Fe-doped Field emission scanning electron microscopy Gas sensing mechanism Gas sensing properties Inter-digitated electrodes Metal oxide thin films Operating temperature X ray absorption near edge structure Thin films In this work, the effects of Fe-doping on structural and gas-sensing properties of CaCu3Ti4O12 (CCTO) thin film prepared by a sol-gel method were systematically studied. Sol-gel-derived CCTO thin films with different Fe-doping concentrations were deposited on alumina substrates by spin-coating and Au/Cr interdigitated electrodes were patterned onto the films by photolithography, sputtering and lift-off processes. Characterizations by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, X-ray photoemission spectroscopy and X-ray absorption near edge structure confirmed the perovskite CCTO phase with TiO2 and CuO secondary phases and suggested the substitution of Fe3+ ions at Ti4+ sites of CCTO structure. From gas-sensing measurements, Fe dopants greatly enhance H2S response, response time and H2S selectivity against NH3, CO, C2H2, CH4, ethanol and NO2. In particular, 9 wt% (∼3 at%) Fe-doped CCTO sensor exhibited the highest response of ∼126 to 10 ppm H2S, which was more than one order of magnitude higher than that of the undoped CCTO sensor at a low optimum operating temperature of 250 °C. The roles of Fe-dopant on gas-sensing mechanisms of CCTO sensor were proposed. © 2015 Elsevier B.V. All rights reserved. Fil:Hodak, J.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09254005_v224_n_p118_Pongpaiboonkul
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Fe-doped CaCu3Ti4O12 H2S sensor Metal oxide thin films Sol-gel Alumina Chemical detection Chemical sensors Doping (additives) Energy dispersive spectroscopy Field emission microscopes Film preparation Gas detectors Gas sensing electrodes Gold Gold deposits Metals Oxide films Photoelectron spectroscopy Photolithography Scanning electron microscopy Semiconductor doping Sol-gel process Sol-gels X ray absorption X ray absorption near edge structure spectroscopy X ray diffraction X ray spectroscopy Fe-doped Field emission scanning electron microscopy Gas sensing mechanism Gas sensing properties Inter-digitated electrodes Metal oxide thin films Operating temperature X ray absorption near edge structure Thin films
spellingShingle	Fe-doped CaCu3Ti4O12 H2S sensor Metal oxide thin films Sol-gel Alumina Chemical detection Chemical sensors Doping (additives) Energy dispersive spectroscopy Field emission microscopes Film preparation Gas detectors Gas sensing electrodes Gold Gold deposits Metals Oxide films Photoelectron spectroscopy Photolithography Scanning electron microscopy Semiconductor doping Sol-gel process Sol-gels X ray absorption X ray absorption near edge structure spectroscopy X ray diffraction X ray spectroscopy Fe-doped Field emission scanning electron microscopy Gas sensing mechanism Gas sensing properties Inter-digitated electrodes Metal oxide thin films Operating temperature X ray absorption near edge structure Thin films Pongpaiboonkul, S. Phokharatkul, D. Hodak, J.H. Wisitsoraat, A. Hodak, S.K. Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
topic_facet	Fe-doped CaCu3Ti4O12 H2S sensor Metal oxide thin films Sol-gel Alumina Chemical detection Chemical sensors Doping (additives) Energy dispersive spectroscopy Field emission microscopes Film preparation Gas detectors Gas sensing electrodes Gold Gold deposits Metals Oxide films Photoelectron spectroscopy Photolithography Scanning electron microscopy Semiconductor doping Sol-gel process Sol-gels X ray absorption X ray absorption near edge structure spectroscopy X ray diffraction X ray spectroscopy Fe-doped Field emission scanning electron microscopy Gas sensing mechanism Gas sensing properties Inter-digitated electrodes Metal oxide thin films Operating temperature X ray absorption near edge structure Thin films
description	In this work, the effects of Fe-doping on structural and gas-sensing properties of CaCu3Ti4O12 (CCTO) thin film prepared by a sol-gel method were systematically studied. Sol-gel-derived CCTO thin films with different Fe-doping concentrations were deposited on alumina substrates by spin-coating and Au/Cr interdigitated electrodes were patterned onto the films by photolithography, sputtering and lift-off processes. Characterizations by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, X-ray photoemission spectroscopy and X-ray absorption near edge structure confirmed the perovskite CCTO phase with TiO2 and CuO secondary phases and suggested the substitution of Fe3+ ions at Ti4+ sites of CCTO structure. From gas-sensing measurements, Fe dopants greatly enhance H2S response, response time and H2S selectivity against NH3, CO, C2H2, CH4, ethanol and NO2. In particular, 9 wt% (∼3 at%) Fe-doped CCTO sensor exhibited the highest response of ∼126 to 10 ppm H2S, which was more than one order of magnitude higher than that of the undoped CCTO sensor at a low optimum operating temperature of 250 °C. The roles of Fe-dopant on gas-sensing mechanisms of CCTO sensor were proposed. © 2015 Elsevier B.V. All rights reserved.
format	JOUR
author	Pongpaiboonkul, S. Phokharatkul, D. Hodak, J.H. Wisitsoraat, A. Hodak, S.K.
author_facet	Pongpaiboonkul, S. Phokharatkul, D. Hodak, J.H. Wisitsoraat, A. Hodak, S.K.
author_sort	Pongpaiboonkul, S.
title	Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
title_short	Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
title_full	Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
title_fullStr	Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
title_full_unstemmed	Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method
title_sort	enhancement of h2s-sensing performances with fe-doping in cacu3ti4o12 thin films prepared by a sol-gel method
url	http://hdl.handle.net/20.500.12110/paper_09254005_v224_n_p118_Pongpaiboonkul
work_keys_str_mv	AT pongpaiboonkuls enhancementofh2ssensingperformanceswithfedopingincacu3ti4o12thinfilmspreparedbyasolgelmethod AT phokharatkuld enhancementofh2ssensingperformanceswithfedopingincacu3ti4o12thinfilmspreparedbyasolgelmethod AT hodakjh enhancementofh2ssensingperformanceswithfedopingincacu3ti4o12thinfilmspreparedbyasolgelmethod AT wisitsoraata enhancementofh2ssensingperformanceswithfedopingincacu3ti4o12thinfilmspreparedbyasolgelmethod AT hodaksk enhancementofh2ssensingperformanceswithfedopingincacu3ti4o12thinfilmspreparedbyasolgelmethod
_version_	1807321107630391296

Enhancement of H2S-sensing performances with Fe-doping in CaCu3Ti4O12 thin films prepared by a sol-gel method

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