Abstract
Undoped and barium (Ba)-doped zinc oxide nanoparticles (BZ NPs) were successfully synthesized as a gas sensor by sol-gel method at high humidity. The performance of hexagonal structure BZ NPs was investigated in sensing ethanol gas. The physical features of the BZ NPs samples such as microstructure, morphology, and photoluminescence (PL) were examined. The X-ray diffraction (XRD) pattern illustrated that the Ba-doping significantly affects grain size, and crystalline quality in the BZ NPs. Also, the effects of temperature changes, gas concentrations, gas type, and relative humidity (RH) on the gas sensing system were investigated. The obtained data showed the high ethanol selectivity over the different gases, such as methanol, benzene, formaldehyde, carbon monoxide, and acetone. The improvement of sensing parameters was ascribed to the accumulation of active area for oxygen adsorption and test gases on the surface of BZ NPs samples. By rising RH from 25 to 60%, the response was gradually increased from 15 to 44 for undoped and 6% BZ NPs, respectively. When increasing the RH from 60 to 88%, the response decreased gradually. Moreover, recovery time for 5 to 100 ppm gas concentrations increased from 44 to 75 s, respectively.
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.
