Highly selective hydrogen sensing of Pt-loaded WO3 synthesized by hydrothermal/impregnation methods |
| |
| Authors: | Thanittha Samerjai Chaikarn Liewhiran Anurat Wisitsoraat Adisorn Tuantranont Chanitpa Khanta Sukon Phanichphant |
| |
| Affiliation: | 1. Nanoscience and Nanotechnology Program, Faculty of Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand;2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;3. Nanoelectronics and MEMS Laboratory, National Electronics and Computer Technology Center, KlongLuang, Pathumthani 12120, Thailand;4. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand |
| |
| Abstract: | Unloaded and 0.25–1.0 wt% Pt-loaded WO3 nanoparticles were synthesized by hydrothermal method using sodium tungstate dihydrate and sodium chloride as precursors in an acidic condition and impregnated using platinum acetylacetonate. Pt-loaded WO3 films on an Al2O3 substrate with interdigitated Au electrodes were prepared by spin-coating technique. The response of WO3 sensors with different Pt-loading concentrations was tested towards 0.01–1.0 vol% of H2 in air as a function of operating temperature (200–350 °C). The 1.0 wt% Pt-loaded WO3 sensing film showed the highest response of ∼2.16 × 104 to 1.0 vol% H2 at 250 °C. Therefore, an operating temperature of 250 °C was optimal for H2 detection. The responses of 1.0 wt% Pt-loaded WO3 sensing film to other flammable gases, including C2H5OH, C2H4 and CO, were considerably less, demonstrating Pt-loaded WO3 sensing film to be highly selective to H2. |
| |
| Keywords: | Hydrogen (H2) Pt-loaded WO3 nanoparticles Hydrothermal/impregnation methods Gas sensor |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
