Ethanol sensors fabricated from PdO/WO<inf>3</inf>nanorods

• Main Authors: Sathukarn Kabcum, Duangdao Channei, Adisorn Tuantranont, Anurat Wisitsoraat, Chaikarn Liewhiran, Sukon Phanichphant
• Format: Journal
• Published: 2018
• Subjects: Biochemistry, Genetics and Molecular Biology; Chemistry; Materials Science; Mathematics; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85050279806&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/58232
• Institution: Chiang Mai University

© 2018, Chiang Mai University. All rights reserved. In this work, ethanol sensing films were prepared by spin-coating of PdO/WO3nanorods pasted onto Al2O3substrates interdigitated with Au electrodes and tested towards 50-2000 ppm C2H5OH at different operating temperatures ranging from 150-350 °C. It was found that the C2H5OH responses of PdO-loaded WO3sensors monotonically increased with increasing operating temperature to 350 °C and increased greatly with increasing PdO-loading level up to 1.0 wt%. In particular, the optimal 1.0 wt% PdO-loaded sensor exhibited an ultra-high response of 1.52 ×104to 2000 ppm C2H5OH at 350 °C with a short response time of ∼3 s. In addition, PdO-loaded WO3sensing films displayed high ethanol selectivity against CO, NO2, NH3and H2S. Therefore, PdO-loaded WO3nanorods sensors prepared by the precipitation and impregnation methods are promising for highly sensitive and selective for ethanol sensing.