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ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors

Pd nanoparticle-functionalized, xIn(2)O(3) (x = 0.05, 0.1, and 0.15)-loaded ZnO nanofibers were synthesized by an electrospinning and ultraviolet (UV) irradiation method and assessed for their hydrogen gas sensing properties. Morphological and chemical analyses revealed the desired morphology and ch...

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Autores principales: Lee, Jae-Hyoung, Kim, Jae-Hun, Kim, Jin-Young, Mirzaei, Ali, Kim, Hyoun Woo, Kim, Sang Sub
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6806323/
https://www.ncbi.nlm.nih.gov/pubmed/31581664
http://dx.doi.org/10.3390/s19194276
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author Lee, Jae-Hyoung
Kim, Jae-Hun
Kim, Jin-Young
Mirzaei, Ali
Kim, Hyoun Woo
Kim, Sang Sub
author_facet Lee, Jae-Hyoung
Kim, Jae-Hun
Kim, Jin-Young
Mirzaei, Ali
Kim, Hyoun Woo
Kim, Sang Sub
author_sort Lee, Jae-Hyoung
collection PubMed
description Pd nanoparticle-functionalized, xIn(2)O(3) (x = 0.05, 0.1, and 0.15)-loaded ZnO nanofibers were synthesized by an electrospinning and ultraviolet (UV) irradiation method and assessed for their hydrogen gas sensing properties. Morphological and chemical analyses revealed the desired morphology and chemical composition of the synthesized nanofibers. The optimal gas sensor namely Pd-functionalized, 0.1In(2)O(3)-loaded ZnO nanofibers showed a very strong response to 172–50 ppb hydrogen gas at 350 °C, which is regarded as the optimal sensing temperature. Furthermore, the gas sensors showed excellent selectivity to hydrogen gas due to the much lower response to CO and NO(2) gases. The enhanced gas response was attributed to the excellent catalytic activity of Pd to hydrogen gas, and the formation of Pd/ZnO and In(2)O(3)/ZnO heterojunctions, ZnO–ZnO homojunction, as well as the formation of PdH(x). Overall, highly sensitive and selective hydrogen gas sensors can be produced based on a simple methodology using a synergistic effect from Pd functionalization and In(2)O(3) loading in ZnO nanofibers.
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spelling pubmed-68063232019-11-07 ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors Lee, Jae-Hyoung Kim, Jae-Hun Kim, Jin-Young Mirzaei, Ali Kim, Hyoun Woo Kim, Sang Sub Sensors (Basel) Article Pd nanoparticle-functionalized, xIn(2)O(3) (x = 0.05, 0.1, and 0.15)-loaded ZnO nanofibers were synthesized by an electrospinning and ultraviolet (UV) irradiation method and assessed for their hydrogen gas sensing properties. Morphological and chemical analyses revealed the desired morphology and chemical composition of the synthesized nanofibers. The optimal gas sensor namely Pd-functionalized, 0.1In(2)O(3)-loaded ZnO nanofibers showed a very strong response to 172–50 ppb hydrogen gas at 350 °C, which is regarded as the optimal sensing temperature. Furthermore, the gas sensors showed excellent selectivity to hydrogen gas due to the much lower response to CO and NO(2) gases. The enhanced gas response was attributed to the excellent catalytic activity of Pd to hydrogen gas, and the formation of Pd/ZnO and In(2)O(3)/ZnO heterojunctions, ZnO–ZnO homojunction, as well as the formation of PdH(x). Overall, highly sensitive and selective hydrogen gas sensors can be produced based on a simple methodology using a synergistic effect from Pd functionalization and In(2)O(3) loading in ZnO nanofibers. MDPI 2019-10-02 /pmc/articles/PMC6806323/ /pubmed/31581664 http://dx.doi.org/10.3390/s19194276 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lee, Jae-Hyoung
Kim, Jae-Hun
Kim, Jin-Young
Mirzaei, Ali
Kim, Hyoun Woo
Kim, Sang Sub
ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title_full ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title_fullStr ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title_full_unstemmed ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title_short ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In(2)O(3)-Loaded ZnO Nanofiber Gas Sensors
title_sort ppb-level selective hydrogen gas detection of pd-functionalized in(2)o(3)-loaded zno nanofiber gas sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6806323/
https://www.ncbi.nlm.nih.gov/pubmed/31581664
http://dx.doi.org/10.3390/s19194276
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