| Title: | Study on Sensing Mechanism of Volatile Organic Compounds Using Pt-Loaded ZnO Nanocrystals |
| Author(s): | Shinkai T; Masumoto K; Iwai M; Inomata Y; Kida T; |
| Address: | "Department of Material Science and Applied Chemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan. Division of Materials Science, Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan. Institute of Industrial Nanomaterials, Kumamoto University, Kumamoto 860-8555, Japan. International Research Organization for Advanced Science and Technology (IROAST), Kumamoto University, Kumamoto 860-8555, Japan" |
| ISSN/ISBN: | 1424-8220 (Electronic) 1424-8220 (Linking) |
| Abstract: | "Understanding the surface chemistry of target gases on sensing materials is essential for designing high-performance gas sensors. Here, we report the effect of Pt-loading on the sensing of volatile organic compounds (VOCs) with ZnO gas sensors, demonstrated by diffuse reflection infrared Fourier transform (DRIFT) spectroscopy. Pt-loaded ZnO nanocrystals (NCs) of 13~22 nm are synthesized using the hot soap method. The synthesized powder is deposited on an alumina substrate by screen-printing to form a particulate gas sensing film. The 0.1 wt% Pt-loaded ZnO NC sensor shows the highest sensor response to acetone and ethanol at 350 degrees C, while the responses to CO and H(2) are small and exhibit good selectivity to VOCs. The gas sensing mechanism of ethanol with Pt-ZnO NCs was studied by in situ DRIFT spectroscopy combined with online FT-IR gas analysis. The results show that ethanol reacts with small Pt-loaded ZnO to produce intermediate species such as acetaldehyde, acetate, and carbonate, which generates a high sensor response to ethanol in air" |
| Keywords: | Drift Pt-loading ZnO catalytic activity ethanol semiconductor gas sensor; |
| Notes: | "PubMed-not-MEDLINEShinkai, Takeshi Masumoto, Keigo Iwai, Masaru Inomata, Yusuke Kida, Tetsuya eng 2020M-206/JKA Foundation/ 20KK0110/Japan Society for the Promotion of Science/ Switzerland 2022/08/27 Sensors (Basel). 2022 Aug 20; 22(16):6277. doi: 10.3390/s22166277" |
