期刊
JOURNAL OF NANOMATERIALS
卷 2013, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2013/497318
关键词
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资金
- Thailand's Office of the Higher Education Commission, Uttaradit Rajabhat University
- Graduate school, Chiang Mai University
- National Research University Project under Thailand's Office of the Higher Education Commission, Department of Chemistry, Faculty of Science, Chiang Mai University
- National Electronics and Computer Technology Center, Pathumthani, Thailand
The hydrogen gas sensors were developed successfully using flame-made platinum-loaded titanium dioxide (Pt-loaded TiO2) nanoparticles as the sensing materials. Pt-loaded TiO2 thin films were prepared by spin-coating technique onto Al2O3 substrates interdigitated with Au electrodes. Structural and gas-sensing characteristics were examined by using scanning electron microscopy (SEM) and showed surface morphology of the deposited film. X-ray diffraction (XRD) patterns can be confirmed to be the anatase and rutile phases of TiO2. High-resolution transmission electron microscopy (HRTEM) showed that Pt nanoparticles deposited on larger TiO2 nanoparticles. TiO2 films loaded with Pt nanoparticles were used as conductometric sensors for the detection of H-2. The gas sensing of H-2 was studied at the operating temperatures of 300, 350, and 400 degrees C in dry air. It was found that 2.00 mol% Pt-loaded TiO2 sensing films showed higher response towards H-2 gas than the unloaded film. In addition, the responses of Pt-loaded TiO2 films at all operating temperatures were higher than that of unloaded TiO2 film. The response increased and the response time decreased with increasing of H-2 concentrations.
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