H<sub>2</sub> Sensor Based on Au/TiO<sub>2</sub> Nanoparticles by Flame-Made

Authors

  • Weerasak Chomkitichai Chiang Mai University
  • Nittaya Tamaekong Maejo University
  • Chaikarn Liewhiran Chiang Mai University
  • Anurat Wisitsoraat National Electronics and Computer Technology Center (NECTEC)
  • Saengrawee Sriwichai Chiang Mai University
  • Sukon Phanichphant Chiang Mai University

DOI:

https://doi.org/10.4186/ej.2012.16.3.135

Keywords:

H2, gas sensor, Au/TiO2 nanoparticles, flame-made.

Abstract

TiO2 is used extensively as a gas sensing material due to its change in electrical conductivity under analyst gas exposure. Gold (Au) is a good catalyst that promotes chemical reactions by reducing the activation energy between sensing film and particular gas. Pure TiO2 and TiO2 nanoparticles doped with 0.25-0.75 at% Au were successfully produced in a single step by Flame spray pyrolysis (FSP) technique. The structure and morphology of as-prepared products have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM). TiO2 and Au-doped TiO2 nanoparticle films were prepared by spin-coating technique. The gas sensing of H2 was studied at the operating temperatures ranging from 300-350°C in dry air. It was found that the TiO2 doped with Au sensing film showed higher response of H2, with faster response time (within second) than pure TiO2 sensing film. The response increased and the response time decreased with increasing H2 concentrations.

Downloads

Download data is not yet available.

Author Biographies

Weerasak Chomkitichai

Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand

Nittaya Tamaekong

Program in materials science, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand

Chaikarn Liewhiran

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Anurat Wisitsoraat

Nanoelectronics and MEMS Laboratory, National Electronics and Computer Technology Center, Klong Luang, Pathumthani, 12120, Thailand

Saengrawee Sriwichai

Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand

Sukon Phanichphant

Materials Science Research Center, Faculty of Science, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand

Downloads

Published In
Vol 16 No 3, Feb 27, 2012
How to Cite
[1]
W. Chomkitichai, N. Tamaekong, C. Liewhiran, A. Wisitsoraat, S. Sriwichai, and S. Phanichphant, “H<sub>2</sub> Sensor Based on Au/TiO<sub>2</sub> Nanoparticles by Flame-Made”, Eng. J., vol. 16, no. 3, pp. 135-142, Feb. 2012.

Most read articles by the same author(s)

Similar Articles

You may also start an advanced similarity search for this article.