Anomalous NO2 sensing behavior by hydrothermally synthesized V2O5 nanoparticles
Abstract
Vanadium Pentoxide is a promising material for chemical sensing. In the present study, we synthesized V2O5 nanoparticles by hydrothermal method. Raman spectroscopic and x-ray diffraction studies have been carried out for phase confirmation. Sample showed maximum sensitivity for NO2 gas at 150°C and remained constant at higher temperatures. The sensor material showed a decrease in resistance upon NO2 exposure contrary to the normal trend. The observed anomalous behavior in change in resistance on the exposure to NO2 is due to comparatively higher value of bulk carrier density possibly due to the presence of oxygen vacancy defects.
- Publication:
-
Dae Solid State Physics Symposium 2018
- Pub Date:
- July 2019
- DOI:
- 10.1063/1.5112996
- Bibcode:
- 2019AIPC.2115c0157R