Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature

© 2017 Elsevier Ltd and Techna Group S.r.l. In this work, the hydrogen (H2) sensor performance of gold nanoclusters (Au NCs) assembled onto zinc oxide (ZnO) nanostructures films were investigated and compared to ZnO nanostructures films. ZnO nanostructures were prepared by thermal oxidation of zinc...

Full description

Saved in:
Bibliographic Details
Main Authors: Pichitchai Pimpang, Ahmad Sabirin Zoolfakar, Rozina Abdul Rani, Rosmalini Ab Kadir, Duangmanee Wongratanaphisan, Atcharawon Gardchareon, Kourosh Kalantar-zadeh, Supab Choopun
Format: Journal
Published: 2018
Subjects:
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85020018427&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/56913
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
id th-cmuir.6653943832-56913
record_format dspace
spelling th-cmuir.6653943832-569132018-09-05T03:42:37Z Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature Pichitchai Pimpang Ahmad Sabirin Zoolfakar Rozina Abdul Rani Rosmalini Ab Kadir Duangmanee Wongratanaphisan Atcharawon Gardchareon Kourosh Kalantar-zadeh Supab Choopun Chemical Engineering Materials Science © 2017 Elsevier Ltd and Techna Group S.r.l. In this work, the hydrogen (H2) sensor performance of gold nanoclusters (Au NCs) assembled onto zinc oxide (ZnO) nanostructures films were investigated and compared to ZnO nanostructures films. ZnO nanostructures were prepared by thermal oxidation of zinc films on glass substrate at different oxidation temperatures. Au NCs were assembled onto obtained ZnO nanostructures via photoreduction of HAuCl4solution. The morphology of ZnO nanostructures were comprised of short rods branched into their ZnO bases. The diameters of cylindrical ZnO nanostructures increased approximately 50 to 90 nm upon increasing the oxidation temperatures. The morphology of Au NCs assembled onto ZnO nanostructures exhibited growth to encapsulate individual ZnO nanostructures as cluster−like with dimensions less than 100–150 nm. The amount of Au NCs assembly was proportion to crystallinity and materials’ stoichiometry of ZnO nanostructures. H2sensor performance of the films were investigated at different operating temperature in the range of 150–450 °C. It was found that optimum operating temperatures of Au NCs assembled ZnO nanostructures films were 200 °C in all cases less than that 350 °C of pure ZnO nanostructures. Au NCs assembled ZnO nanostructures films had still high H2sensor response at operating temperature of 150 °C. Furthermore, the sensor response of Au NCs assembled ZnO nanostructures seems to have higher than those ZnO nanostructures and their sensor response was directly proportion to amount of Au NCs. Accordingly, the enhancement of sensor response can be explained in terms of the reaction rate constant (kOxy) by considering the catalytic effect of Au. These results can be further explored for H2safety sensor in fuel cell due to the demand of high H2response at the low operating temperature. 2018-09-05T03:31:53Z 2018-09-05T03:31:53Z 2017-08-01 Journal 02728842 2-s2.0-85020018427 10.1016/j.ceramint.2017.05.259 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85020018427&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/56913
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemical Engineering
Materials Science
spellingShingle Chemical Engineering
Materials Science
Pichitchai Pimpang
Ahmad Sabirin Zoolfakar
Rozina Abdul Rani
Rosmalini Ab Kadir
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Kourosh Kalantar-zadeh
Supab Choopun
Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
description © 2017 Elsevier Ltd and Techna Group S.r.l. In this work, the hydrogen (H2) sensor performance of gold nanoclusters (Au NCs) assembled onto zinc oxide (ZnO) nanostructures films were investigated and compared to ZnO nanostructures films. ZnO nanostructures were prepared by thermal oxidation of zinc films on glass substrate at different oxidation temperatures. Au NCs were assembled onto obtained ZnO nanostructures via photoreduction of HAuCl4solution. The morphology of ZnO nanostructures were comprised of short rods branched into their ZnO bases. The diameters of cylindrical ZnO nanostructures increased approximately 50 to 90 nm upon increasing the oxidation temperatures. The morphology of Au NCs assembled onto ZnO nanostructures exhibited growth to encapsulate individual ZnO nanostructures as cluster−like with dimensions less than 100–150 nm. The amount of Au NCs assembly was proportion to crystallinity and materials’ stoichiometry of ZnO nanostructures. H2sensor performance of the films were investigated at different operating temperature in the range of 150–450 °C. It was found that optimum operating temperatures of Au NCs assembled ZnO nanostructures films were 200 °C in all cases less than that 350 °C of pure ZnO nanostructures. Au NCs assembled ZnO nanostructures films had still high H2sensor response at operating temperature of 150 °C. Furthermore, the sensor response of Au NCs assembled ZnO nanostructures seems to have higher than those ZnO nanostructures and their sensor response was directly proportion to amount of Au NCs. Accordingly, the enhancement of sensor response can be explained in terms of the reaction rate constant (kOxy) by considering the catalytic effect of Au. These results can be further explored for H2safety sensor in fuel cell due to the demand of high H2response at the low operating temperature.
format Journal
author Pichitchai Pimpang
Ahmad Sabirin Zoolfakar
Rozina Abdul Rani
Rosmalini Ab Kadir
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Kourosh Kalantar-zadeh
Supab Choopun
author_facet Pichitchai Pimpang
Ahmad Sabirin Zoolfakar
Rozina Abdul Rani
Rosmalini Ab Kadir
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Kourosh Kalantar-zadeh
Supab Choopun
author_sort Pichitchai Pimpang
title Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
title_short Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
title_full Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
title_fullStr Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
title_full_unstemmed Hydrogen sensors based on gold nanoclusters assembled onto ZnO nanostructures at low operating temperature
title_sort hydrogen sensors based on gold nanoclusters assembled onto zno nanostructures at low operating temperature
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85020018427&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/56913
_version_ 1681424780927959040