Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods

ZnO tetrapods with a cross-sectional size of about 200-1000 nm were synthesized via an oxidation reaction technique. The sensors based on ZnO tetrapods and platinum impregnated ZnO tetrapods were fabricated and investigated for ethanol sensing properties. The gas sensing properties of the sensors we...

Full description

Saved in:
Bibliographic Details
Main Authors: Hongsith N., Choopun S.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-72349086505&partnerID=40&md5=828ea113856eaec640553bc48820ff6e
http://cmuir.cmu.ac.th/handle/6653943832/6378
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
Language: English
id th-cmuir.6653943832-6378
record_format dspace
spelling th-cmuir.6653943832-63782014-08-30T03:24:09Z Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods Hongsith N. Choopun S. ZnO tetrapods with a cross-sectional size of about 200-1000 nm were synthesized via an oxidation reaction technique. The sensors based on ZnO tetrapods and platinum impregnated ZnO tetrapods were fabricated and investigated for ethanol sensing properties. The gas sensing properties of the sensors were investigated for ethanol concentration of 50-1000 ppm at different operating temperatures. It was found that the sensitivities of platinum impregnated ZnO tetrapod sensors were higher than that of pure ZnO tetrapod sensors. The enhancement of sensitivity due to platinum impregnation to ZnO tetrapods may be explained either by an increase of adsorbed oxygen density or an increase of reaction rate coefficient in a rate equation for an ethanol adsorption reaction on the ZnO surface. Also, the slope value of the plot between log(S' - 1) and log C suggested that adsorbed oxygen ion species at the surface of the platinum impregnated ZnO tetrapods was 02- which was the same as pure ZnO tetrapods. Finally, these results have an important implication for a development of ethanol sensors based on metal oxide semiconductors for alcohol breath analyzers. © 2009 IEEE. 2014-08-30T03:24:09Z 2014-08-30T03:24:09Z 2010 Article 1530437X 10.1109/JSEN.2009.2035746 http://www.scopus.com/inward/record.url?eid=2-s2.0-72349086505&partnerID=40&md5=828ea113856eaec640553bc48820ff6e http://cmuir.cmu.ac.th/handle/6653943832/6378 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description ZnO tetrapods with a cross-sectional size of about 200-1000 nm were synthesized via an oxidation reaction technique. The sensors based on ZnO tetrapods and platinum impregnated ZnO tetrapods were fabricated and investigated for ethanol sensing properties. The gas sensing properties of the sensors were investigated for ethanol concentration of 50-1000 ppm at different operating temperatures. It was found that the sensitivities of platinum impregnated ZnO tetrapod sensors were higher than that of pure ZnO tetrapod sensors. The enhancement of sensitivity due to platinum impregnation to ZnO tetrapods may be explained either by an increase of adsorbed oxygen density or an increase of reaction rate coefficient in a rate equation for an ethanol adsorption reaction on the ZnO surface. Also, the slope value of the plot between log(S' - 1) and log C suggested that adsorbed oxygen ion species at the surface of the platinum impregnated ZnO tetrapods was 02- which was the same as pure ZnO tetrapods. Finally, these results have an important implication for a development of ethanol sensors based on metal oxide semiconductors for alcohol breath analyzers. © 2009 IEEE.
format Article
author Hongsith N.
Choopun S.
spellingShingle Hongsith N.
Choopun S.
Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
author_facet Hongsith N.
Choopun S.
author_sort Hongsith N.
title Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
title_short Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
title_full Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
title_fullStr Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
title_full_unstemmed Enhancement of ethanol sensing properties by impregnating platinum on surface of ZnO tetrapods
title_sort enhancement of ethanol sensing properties by impregnating platinum on surface of zno tetrapods
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-72349086505&partnerID=40&md5=828ea113856eaec640553bc48820ff6e
http://cmuir.cmu.ac.th/handle/6653943832/6378
_version_ 1681420602629423104