Green and Low-Cost Synthesis of TiO2 Nanoparticles for Methanol Detection

Abstract

TiO2 nanoparticles synthesis using Ficus benghalensis leaf extract via green synthesis approach, were characterized using XRD, FTIR, EDAX analysis and SEM. The present study explores the use of as-synthesized TiO2 nanoparticles for the detection of methanol by spin-coating as-synthesized TiO2 nanoparticles (~ 100 nm thickness) over n-type Si substrate as an active material with Au sputtered electrodes (~ 60 nm). The change in resistivity and electrical conductivity when exposed to the analyte clearly evidenced the detection at low operating temperature is recorded. The response curve of transient resistance vs. time was recorded at different working temperatures (50-200 ºC) and the device tested multiple times exhibited the same behaviour affirming the reproducibility with stability of thin film sensor is reported.