Dr Mohammad Reza Mohammadi Department of Materials Science & Engineering Sharif University of Technology Tehran, Iran
Nanocrystalline titanium dioxide (TiO2) and nanostructured titania-based compounds with high specific surface area have a widespread range of new applications in various industries. For gas sensing applications many efforts have been aimed to improve the gas sensing performance by controlling microstructure, doping with hetero components and producing binary metal oxides by varying the composition of its constituents. In the present work, an aqueous particulate sol-gel route (an environmentally friendly processing) is introduced for preparation of nanostructured titania-based compounds. The present method is capable to tailor the crystal structure, phase composition, microstructure, crystallite size, specific surface area, packing and ordering of the products by controlling the processing parameters. Some of these nanomaterials were studied for gas sensing application and exhibited a remarkable response towards low concentrations of CO and NO2 gases at low operating temperature.