Preparation and Characterization of WO₃-Based Liquid Petroleum Gas Sensor

Abstract

The present investigation deals with the fabrication of liquid petroleum gas (LPG) sensor based on WO₃. In this work, WO₃ films were prepared by standard screen-printing method. These films were characterized by X-ray diffraction (XRD) measurements, Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). These films exhibit high sensitivity, excellent selectivity, fast response and recovery to LPG at 400°C in air atmosphere.

Keywords:

• Alumina substrate
• Chemisorption
• EDAX
• FTIR
• Gas sensing studies
• Gas sensor
• LPG
• Screen printing
• SEM
• Semiconductor oxide
• Sensing mechanism
• Recovery time
• Response time
• WO₃ thick-film
• XRD

ACKNOWLEDGMENTSM

The financial support from University Grants Commission (UGC), New Delhi, India under SAP–DRS programme is gratefully acknowledged. R.S.K. is thankful to University Grants Commission (UGC), Pune, Maharashtra, for awarding the teacher fellowship under the XIth FIP program.