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Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism

NO(2) is one of the main greenhouse gases, which is mainly generated by the combustion of fossil fuels. In addition to its contribution to global warming, this gas is also directly dangerous to humans. The present work reports the structural and gas sensing properties of the CaCu(3)Ti(4)O(12) compou...

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Autores principales: Espinoza-González, Rodrigo, Caamaño, Josefa, Castillo, Ximena, Orlandi, Marcelo O., Felix, Anderson A., Flores, Marcos, Blanco, Adriana, Castro-Castillo, Carmen, Gracia, Francisco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179786/
https://www.ncbi.nlm.nih.gov/pubmed/37176271
http://dx.doi.org/10.3390/ma16093390
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author Espinoza-González, Rodrigo
Caamaño, Josefa
Castillo, Ximena
Orlandi, Marcelo O.
Felix, Anderson A.
Flores, Marcos
Blanco, Adriana
Castro-Castillo, Carmen
Gracia, Francisco
author_facet Espinoza-González, Rodrigo
Caamaño, Josefa
Castillo, Ximena
Orlandi, Marcelo O.
Felix, Anderson A.
Flores, Marcos
Blanco, Adriana
Castro-Castillo, Carmen
Gracia, Francisco
author_sort Espinoza-González, Rodrigo
collection PubMed
description NO(2) is one of the main greenhouse gases, which is mainly generated by the combustion of fossil fuels. In addition to its contribution to global warming, this gas is also directly dangerous to humans. The present work reports the structural and gas sensing properties of the CaCu(3)Ti(4)O(12) compound prepared by the sol-gel technique. Rietveld refinement confirmed the formation of the pseudo-cubic CaCu(3)Ti(4)O(12) compound, with less than 4 wt% of the secondary phases. The microstructural and elemental composition analysis were carried out using scanning electron microscopy and X-ray energy dispersive spectroscopy, respectively, while the elemental oxidation states of the samples were determined by X-ray photoelectron spectroscopy. The gas sensing response of the samples was performed for different concentrations of NO(2), H(2), CO, C(2)H(2) and C(2)H(4) at temperatures between 100 and 300 °C. The materials exhibited selectivity for NO(2), showing a greater sensor signal at 250 °C, which was correlated with the highest concentration of nitrite and nitrate species on the CCTO surface using DRIFT spectroscopy.
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spelling pubmed-101797862023-05-13 Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism Espinoza-González, Rodrigo Caamaño, Josefa Castillo, Ximena Orlandi, Marcelo O. Felix, Anderson A. Flores, Marcos Blanco, Adriana Castro-Castillo, Carmen Gracia, Francisco Materials (Basel) Article NO(2) is one of the main greenhouse gases, which is mainly generated by the combustion of fossil fuels. In addition to its contribution to global warming, this gas is also directly dangerous to humans. The present work reports the structural and gas sensing properties of the CaCu(3)Ti(4)O(12) compound prepared by the sol-gel technique. Rietveld refinement confirmed the formation of the pseudo-cubic CaCu(3)Ti(4)O(12) compound, with less than 4 wt% of the secondary phases. The microstructural and elemental composition analysis were carried out using scanning electron microscopy and X-ray energy dispersive spectroscopy, respectively, while the elemental oxidation states of the samples were determined by X-ray photoelectron spectroscopy. The gas sensing response of the samples was performed for different concentrations of NO(2), H(2), CO, C(2)H(2) and C(2)H(4) at temperatures between 100 and 300 °C. The materials exhibited selectivity for NO(2), showing a greater sensor signal at 250 °C, which was correlated with the highest concentration of nitrite and nitrate species on the CCTO surface using DRIFT spectroscopy. MDPI 2023-04-26 /pmc/articles/PMC10179786/ /pubmed/37176271 http://dx.doi.org/10.3390/ma16093390 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Espinoza-González, Rodrigo
Caamaño, Josefa
Castillo, Ximena
Orlandi, Marcelo O.
Felix, Anderson A.
Flores, Marcos
Blanco, Adriana
Castro-Castillo, Carmen
Gracia, Francisco
Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title_full Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title_fullStr Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title_full_unstemmed Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title_short Selective NO(2) Detection of CaCu(3)Ti(4)O(12) Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism
title_sort selective no(2) detection of cacu(3)ti(4)o(12) ceramic prepared by the sol-gel technique and drift measurements to elucidate the gas sensing mechanism
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179786/
https://www.ncbi.nlm.nih.gov/pubmed/37176271
http://dx.doi.org/10.3390/ma16093390
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