Preparation and morphology control of TiO2 nano powders for gas sensor applications are investigated. TiO2 nanopowders with rutile and anatase structures were prepared by controlling the pH value of a precursor solution without any heat treatment. The mean particle size of TiO2 powders were below 10 nm. The prepared TiO2 nano powders were hydrothermal treated by NaOH solution. The sample was washed in HCl solution. As a result and TiO2 nanotubes were formed. The lengths of TiO2 nanotube were 1 μm and the diameters were 10 nm. Crystal structure and microstructure of TiO2 nanotube were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM). As-prepared TiO2 nanotube powders have several advantages of nano particle size and high surface area and could be a prominent candidate for non-sensors. The sensitivity of TiO2 nanotube sensor was measured for toluene and NO in this study.
All Science Journal Classification (ASJC) codes
- Materials Science(all)