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

Abstract 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 synthesi...

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Autores principales:	I. Y. Habib, Aimi Asilah Tajuddin, Hafiz Armi Noor, Chee Ming Lim, Abdul Hanif Mahadi, N. T. R. N. Kumara
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a139d5bd678240488136ca6fc75752fb
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spelling	oai:doaj.org-article:a139d5bd678240488136ca6fc75752fb2021-12-02T15:09:47ZEnhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures10.1038/s41598-019-45313-w2045-2322https://doaj.org/article/a139d5bd678240488136ca6fc75752fb2019-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-45313-whttps://doaj.org/toc/2045-2322Abstract 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.I. Y. HabibAimi Asilah TajuddinHafiz Armi NoorChee Ming LimAbdul Hanif MahadiN. T. R. N. KumaraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q I. Y. Habib Aimi Asilah Tajuddin Hafiz Armi Noor Chee Ming Lim Abdul Hanif Mahadi N. T. R. N. Kumara Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
description	Abstract 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.
format	article
author	I. Y. Habib Aimi Asilah Tajuddin Hafiz Armi Noor Chee Ming Lim Abdul Hanif Mahadi N. T. R. N. Kumara
author_facet	I. Y. Habib Aimi Asilah Tajuddin Hafiz Armi Noor Chee Ming Lim Abdul Hanif Mahadi N. T. R. N. Kumara
author_sort	I. Y. Habib
title	Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures
title_short	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_sort	enhanced carbon monoxide-sensing properties of chromium-doped zno nanostructures
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/a139d5bd678240488136ca6fc75752fb
work_keys_str_mv	AT iyhabib enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures AT aimiasilahtajuddin enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures AT hafizarminoor enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures AT cheeminglim enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures AT abdulhanifmahadi enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures AT ntrnkumara enhancedcarbonmonoxidesensingpropertiesofchromiumdopedznonanostructures
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Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

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