Synthesis, Characterization and Gas Sensing Properties of Titanium Dioxide Nanoparticles by Sol-Gel Method

Abstract:

Titanium dioxide (TiO₂) nanoparticles were synthesized by sol-gel method and the influences of calcination temperature and pH level on the particle size, crystal structure and morphology of the TiO₂ nanoparticles were investigated. X-ray diffraction patterns reveal that the anatase to rutile phase transition occurs at calcination temperature varying from 600°C to 800°C and the phase transformation temperature obviously decreases as the pH level of reaction solution decreases. Scanning electron microscopy images show that pH level and calcination temperature play an important role in controlling the particle size, crystal structure and morphology of the as-prepared TiO₂ nanoparticles. The gas sensing properties of Ag-doped TiO₂ nanoparticles were measured and the experimental results exhibit that the gas sensor based on Ag-doped TiO₂ nanoparticle film has high sensitivity and fast response to ethanol.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 238-243
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.238
• Online since: April 2016
• Authors: Shi Guang Shang, Xin Li, Ling Zhao, Rui Lu, Hai Feng Chen
• Keywords: Calcination Temperature, Gas Sensing Properties, TiO₂ Nanoparticles

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