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Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

Low power consumption, fast response and quick recovery times are important parameters for gas sensors performance. Herein, we report the experimental and theoretical studies of ZnO and Cr doped ZnO nanostructures used in low temperature (50 °C) sensors for the detection of CO. The synthesized films...

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Autores principales: Habib, I. Y., Tajuddin, Aimi Asilah, Noor, Hafiz Armi, Lim, Chee Ming, Mahadi, Abdul Hanif, Kumara, N. T. R. N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6592902/
https://www.ncbi.nlm.nih.gov/pubmed/31239452
http://dx.doi.org/10.1038/s41598-019-45313-w
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author Habib, I. Y.
Tajuddin, Aimi Asilah
Noor, Hafiz Armi
Lim, Chee Ming
Mahadi, Abdul Hanif
Kumara, N. T. R. N.
author_facet Habib, I. Y.
Tajuddin, Aimi Asilah
Noor, Hafiz Armi
Lim, Chee Ming
Mahadi, Abdul Hanif
Kumara, N. T. R. N.
author_sort Habib, I. Y.
collection PubMed
description Low power consumption, fast response and quick recovery times are important parameters for gas sensors performance. Herein, we report the experimental and theoretical studies of ZnO and Cr doped ZnO nanostructures used in low temperature (50 °C) sensors for the detection of CO. The synthesized films were characterized by XRD, UV-Vis, FE-SEM and EDX. The XRD patterns for the ZnO and 0.5 wt% Cr/ZnO films confirm the formation of a single-phase hexagonal wurtzite structure. The reduction of the ZnO optical band gap from 3.12 eV to 2.80 eV upon 0.5 wt% Cr doping is well correlated with the simulation data. The FE-SEM images of the films show spherical morphology with the estimated particle sizes of about ~40 nm and ~ 25 nm were recorded for the ZnO and 0.5 wt% Cr/ZnO films, respectively. Enhanced gas sensing performance is achieved with Cr doping and the sensitivity of ZnO increases from 9.65% to 65.45%, and simultaneously decreasing the response and recovery times from 334.5 s to 172.3 s and from 219 s to 37.2 s, respectively. These improvements in gas sensing performance are due to the reduction in particle size and optical band gap, and an increase in specific surface area.
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spelling pubmed-65929022019-07-03 Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures Habib, I. Y. Tajuddin, Aimi Asilah Noor, Hafiz Armi Lim, Chee Ming Mahadi, Abdul Hanif Kumara, N. T. R. N. Sci Rep Article Low power consumption, fast response and quick recovery times are important parameters for gas sensors performance. Herein, we report the experimental and theoretical studies of ZnO and Cr doped ZnO nanostructures used in low temperature (50 °C) sensors for the detection of CO. The synthesized films were characterized by XRD, UV-Vis, FE-SEM and EDX. The XRD patterns for the ZnO and 0.5 wt% Cr/ZnO films confirm the formation of a single-phase hexagonal wurtzite structure. The reduction of the ZnO optical band gap from 3.12 eV to 2.80 eV upon 0.5 wt% Cr doping is well correlated with the simulation data. The FE-SEM images of the films show spherical morphology with the estimated particle sizes of about ~40 nm and ~ 25 nm were recorded for the ZnO and 0.5 wt% Cr/ZnO films, respectively. Enhanced gas sensing performance is achieved with Cr doping and the sensitivity of ZnO increases from 9.65% to 65.45%, and simultaneously decreasing the response and recovery times from 334.5 s to 172.3 s and from 219 s to 37.2 s, respectively. These improvements in gas sensing performance are due to the reduction in particle size and optical band gap, and an increase in specific surface area. Nature Publishing Group UK 2019-06-25 /pmc/articles/PMC6592902/ /pubmed/31239452 http://dx.doi.org/10.1038/s41598-019-45313-w Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Habib, I. Y.
Tajuddin, Aimi Asilah
Noor, Hafiz Armi
Lim, Chee Ming
Mahadi, Abdul Hanif
Kumara, N. T. R. N.
Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_full Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_fullStr Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_full_unstemmed Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_short Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_sort enhanced carbon monoxide-sensing properties of chromium-doped zno nanostructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6592902/
https://www.ncbi.nlm.nih.gov/pubmed/31239452
http://dx.doi.org/10.1038/s41598-019-45313-w
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