Year-end Sale % OFF 
Abstract
Room-temperature detection of ppb-level NO2 is of significant importance for air quality monitoring and human health. In this study, three-dimensionally ordered macroporous (3DOM) Zn-doped In2O3 was synthesized using a sacrificial colloidal crystal template method. The influence of light wavelength and irradiance on the NO2 sensing performance of the sensors has been systematically investigated. Reversible, linear responses toward ppb-level NO2 were achieved under illumination with light of various wavelengths at room temperature. UV-illuminated samples were found to exhibit higher response and faster response/recovery in sensing NO2 as compared to those of the visible-light-irradiated ones. 3DOM Zn-doped In2O3 exhibited a response (ratio of the sensor resistance in NO2 to the one in air) as high as 21.6 toward 50 ppb NO2 under UV irradiation (0.15mW/cm2). Zn doping was found to effectively improve the NO2 sensing performance of In2O3. 1% Zn-doped In2O3 exhibited a NO2 response approximately twice that of the pristine In2O3. The sensing mechanism under illumination has been elaborated. Our findings with 3DOM Zn-doped In2O3 suggest its potential application as high performance NO2 sensor at room temperature.
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.
