Document Type : Research Paper

Authors

Department of Chemistry, College of Science, University of Baghdad, Baghdad, Iraq

Abstract

Titanium dioxide was prepared under high temperature and pressure by solvothermal method. XRD crystallography of TiO2 showed decreases in crystalline size with increasing temperature, which means an increase in the surface area that increases the activity of the compound. Whereas in B-TiO2, the crystal size decreased to 130℃ and then increased again at190℃, and it was a doping of 5% by weight of boric acid. We used temperatures of 70, 100, 130, 160 and 190 °C, respectively, and the energy gap values in the pure state were 3.23, 3.21, 3.11, 3.04 and 3.01 eV, respectively, while the energy gap values for B-TiO2 were 2.94, 2.5, 2.7, 2.4 and 3.04 eV, respectively. XRD measurements were taken at three temperatures of 70, 130 and 190℃, respectively. The crystal thickness according to XRD measurements for pure substance was 29.1, 7.61, and 1.046 nanometers, respectively, while crystal thickness for B-TiO2 was 15.575, 6.887, and 9.79 nanometers, respectively. FE-SEM measurements were taken at three temperatures of 70, 130, and 190℃, respectively. The diameters of the crystals according to FE-SEM measurements for TiO2 were 19.245, 24.00286, and 25.21 nanometers, respectively, while the crystal diameters for B-TiO2 were 13.68, 60.68714 and 57.00714 nanometers, respectively. The shapes of nanoparticles ranged between nanorods, nanotubes, and nanoflowers. We expect these structures to have promising future features in various applications.

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