Abstract
Pure and Pd‐doped WO3 Nanocrystalline tungsten oxide films on alumina substrates were prepared via sol‐gel method from peroxopolytungstic acid. AFM, XRD, SEM, XPS methods were used to determine the surface morphology, grain size and layer composition. XRD analysis showed WO3 nanocrystalline particles in monoclinic phase and with average size of about 33±3 nm, which was consistent with SEM analysis results. Sensing properties of samples toward H2 gas was studied. The sensitivity of WO3 nanocrystalline films was about 4 at 2300 ppm (0.2%) H2 gas. Introducing Pd to the system led to an increase in the sensitivity about 2 orders of magnitude. The sensitivity of Pd: WO3 was about 400 at 2300 ppm H2.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry
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.