P1.0.3 Pt-loaded WO3 Thick Films for NO2 Gas sensing
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.0 Metal Oxide-based Sensors
- Author(s)
- T. Samerjai - Nanoscience and Nanotechnology Program, Graduate School, Chiang Mai University (Tailand), N. Tamaekong - Nanoscience Research Laboratory, Faculty of Science, Chiang Mai University (Tailand), C. Liewhiran - Department of Physics and Materials Science, Faculty of Science (Tailand), A. Wisitsoraat - Nanoelectronics and MEMS Laboratory, Pathumthani (Tailand), S. Phanichphant - Materials Science Research Center, Faculty of Science, Chiang Mai University (Tailand)
- Pages
- 754 - 757
- DOI
- 10.5162/IMCS2012/P1.0.3
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Unloaded WO3 and 0.25–1.0 wt% Pt-loaded WO3 nanoparticles were synthesized by flame spray pyrolysis (FSP). Tungsten (VI) ethoxide 5% w/v in ethanol 99.8% and platinum (II) acetylacetonate were used as W and Pt precursors respectively. The unloaded WO3 and 0.25–1.0 wt% Pt-loaded WO3 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and High resolution transmission electron microscopy (HR-TEM). The BET surface area (SSABET) of the nanoparticles was measured by nitrogen adsorption. The thick films on alumina substrate interdigitated with gold electrodes were fabricated by spin-coating technique. The gas sensing characteristics toward NO2 (1–50 ppm) were performed at the operating temperatures ranging from 150 to 300°C.