COMPARISON OF ANATASE AND RUTILE TiO2 NANOSTRUCTURE FOR GAS SENSING APPLICATION

Abstract

In this work, anatase and rutile titanium dioxide (TiO2) phase nanostructure have been prepared with the use of the hydrothermal approach using titanium tetrachloride solution (TiCl3). X-ray diffraction (XRD) results of TiO2 were proved the anatase and rutile phases observed in the films. The measurements of the Hall effects definite that the electrons have been predominant charges in the process of the conduction (which is the n-type). The morphologies of TiO2 nanoparticles has been observed by the Field Emission Scanning Electron Microscopy (FESEM) reveal the TiO2 rutile films nanoflower like structure, while the TiO2 anatase films consist of voids and particles like spherical in shape. The sensitivity of the sensors was determined by varying the conductivity of the sensor material under H2S gas with several working temperatures. It was determined that the fabricated sensor using rutile TiO2 nanoparticle has high sensitivity, long response time, and fast recovery time compared to anatase TiO2 nanoparticle. Fabricated sensor based rutile TiO2 nanoparticle has higher sensitivity at 373 °K.