Abstract
The structural stability of TiO2 thick films on Au and Pt electrodes was investigated under UV light activation for sensing formaldehyde in moisture circumstances. A chameleon phenomenon of TiO2 on the anode was found on the Au electrode samples, while no color changed on the Pt samples. The discolored (puce) TiO2 powders were characterized by X-ray photoelectron spectroscopy, where the generation of Ti3+ was verified. Different mechanisms that caused the disparities between the Au and Pt ones were discussed in detail. With the purpose of further evaluating the gas sensing performance stability, four test circles were performed. The Au electrode samples emerged an irreversible drift, while the Pt samples perfectly recovered to initial state undergoing a transitory 300°C thermal cycle. The results in this paper show that Pt electrode is a suitable choice for TiO2 sensing formaldehyde in moisture circumstances.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
More From: Sensors and Actuators B: Chemical
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
