Aero-gel assisted synthesis of anatase TiO2 nanoparticles for humidity sensing application

Abstract

Aero-gel based one-pot synthesis of anatase phase TiO₂ nanoparticles having a high surface area of 125 m² g⁻¹ has been reported in this work. The humidity sensing perfomance of the obtained porous TiO₂ nanoparticles exhibits a quick response (2 s) and fast recovery (1.5 s), negligible hysteresis (<1%) and good stability in the 11–98%RH range. The relationship between %RH and resistance was found to be linear while the sensitivity increases with increase in %RH.