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Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading
Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1−x)ZnO-xNiO (x = 0.03, 0.05, 0.7, 0.1, and 0.15 wt%), for hydrogen gas sensing...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6265876/ https://www.ncbi.nlm.nih.gov/pubmed/30400336 http://dx.doi.org/10.3390/nano8110902 |
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author | Lee, Jae-Hyoung Kim, Jin-Young Mirzaei, Ali Kim, Hyoun Woo Kim, Sang Sub |
author_facet | Lee, Jae-Hyoung Kim, Jin-Young Mirzaei, Ali Kim, Hyoun Woo Kim, Sang Sub |
author_sort | Lee, Jae-Hyoung |
collection | PubMed |
description | Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1−x)ZnO-xNiO (x = 0.03, 0.05, 0.7, 0.1, and 0.15 wt%), for hydrogen gas sensing experiments. Samples were prepared through the electrospinning technique followed by a calcination process. The sensing experiments showed that the sample with 0.05 wt% NiO loading resulted in the highest sensing performance at an optimal sensing temperature of 200 °C. The sensing mechanism is discussed in detail and contributions of the p-n heterojunctions, metallization of ZnO and catalytic effect of NiO on the sensing enhancements of an optimized gas sensor are analyzed. This study demonstrates the possibility of fabricating high-performance H(2) sensors through the optimization of p-type metal oxide loading on the surfaces of n-type metal oxides. |
format | Online Article Text |
id | pubmed-6265876 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62658762018-12-06 Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading Lee, Jae-Hyoung Kim, Jin-Young Mirzaei, Ali Kim, Hyoun Woo Kim, Sang Sub Nanomaterials (Basel) Article Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1−x)ZnO-xNiO (x = 0.03, 0.05, 0.7, 0.1, and 0.15 wt%), for hydrogen gas sensing experiments. Samples were prepared through the electrospinning technique followed by a calcination process. The sensing experiments showed that the sample with 0.05 wt% NiO loading resulted in the highest sensing performance at an optimal sensing temperature of 200 °C. The sensing mechanism is discussed in detail and contributions of the p-n heterojunctions, metallization of ZnO and catalytic effect of NiO on the sensing enhancements of an optimized gas sensor are analyzed. This study demonstrates the possibility of fabricating high-performance H(2) sensors through the optimization of p-type metal oxide loading on the surfaces of n-type metal oxides. MDPI 2018-11-03 /pmc/articles/PMC6265876/ /pubmed/30400336 http://dx.doi.org/10.3390/nano8110902 Text en © 2018 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, Jin-Young Mirzaei, Ali Kim, Hyoun Woo Kim, Sang Sub Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title | Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title_full | Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title_fullStr | Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title_full_unstemmed | Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title_short | Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading |
title_sort | significant enhancement of hydrogen-sensing properties of zno nanofibers through nio loading |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6265876/ https://www.ncbi.nlm.nih.gov/pubmed/30400336 http://dx.doi.org/10.3390/nano8110902 |
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