Enhanced xylene sensing performance using Ag-V2O5 loaded mesoporous graphitic carbon nitride
Vandna Chaudhary1, Satya Pal Nehra
1Center of Excellence for Energy and Environmental Studies, D.C.R. University of Science & Technology, Murthal, Sonepat, Haryana 131039, India. vduhoon250887@gail.com spnehra.energy@dcrustm.org.
Dalton Transactions (Cambridge, England : 2003)
|May 26, 2021
Summary
A novel silver-vanadium pentoxide loaded graphitic carbon nitride (Ag-V2O5/mpg-CN) hybrid sensor demonstrates rapid and sensitive detection of xylene and other volatile organic compounds (VOCs) at room temperature.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Sensing
Background:
- Volatile organic compounds (VOCs) pose risks to indoor air quality.
- Development of sensitive and selective gas sensors is crucial for environmental monitoring.
Purpose of the Study:
- To fabricate a 3D ordered cubic mesoporous Ag-V2O5/mpg-CN hybrid nanocomposite.
- To investigate its gas sensing properties towards common VOCs.
Main Methods:
- Nanocasting technique using mesoporous silica (KIT-6) as a hard template.
- Characterization using TEM, XRD, SEM, EDX, and BET analysis.
- Gas sensing measurements at varying temperatures and concentrations.
Main Results:
- The Ag-V2O5/mpg-CN nanocomposite exhibited temperature-dependent sensing responses to xylene, formaldehyde, 2-propanol, and benzene.
- High sensing response values for xylene (4.9 at 50 ppm, 12.7 at 500 ppm) at 40 °C.
- Fast response/recovery times for all tested VOCs, e.g., 6.1/4.1 s for xylene.
Conclusions:
- The fabricated Ag-V2O5/mpg-CN sensor shows significant potential for real-time monitoring of indoor air pollutants.
- The material's structure and composition contribute to its enhanced gas sensing performance.
