Abstract
SnO2 thick films doped with atomic ratios ranging from 0 up to 8at.% La, 8at.% Gd, 8at.% Lu were fabricated, respectively, via hydrothermal and impregnation methods. The crystal phase, morphology, and chemical composition of the SnO2-based nanoparticles were characterized by XRD, FE-SEM, EDX, HRTEM and XPS. Sensing properties of La-SnO2, Gd-SnO2, Lu-SnO2 films, as well as the pure SnO2 film, were analyzed toward CO2 in the absence of O2. It was found that the optimal doping element was La and the best doping ratio was 4at.%. The maximum response appeared at an operating temperature of 250°C, on which condition the 4at.% La-SnO2 exhibited a remarkable improvement of response from 5.12 to 29.8 when increasing CO2 concentration from 50 to 500ppm. Furthermore, the working mechanism underlying such enhancement in CO2-sensing functions by La additive in the absence of O2 was proposed and discussed.
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
