Abstract Titanium dioxide was prepared using pulsed laser ablation (PLA) and hydrothermal method. Scanning electron microscopy images showed that the product from hydrothermal method had a nanotube shape, whereas those from PLA in liquid were nanoparticles. The optical properties in the absorption curve of product from the hydrothermal method were slightly greater than those from the PLA method, and the energy gaps were 3.39 and 3.26 eV for the hydrothermal method and PLA, respectively. XRD results showed that the TiO2 prepared through PLA showed one phase (rutile), whereas those prepared through hydrothermal method showed two phases (anatase and rutile). Moreover, the product from hydrothermal method had smaller particle size smaller than that from PLA. Furthermore, the product yield and the required reaction time of the hydrothermal method were higher than those of PLA.

Abstract. Titanium dioxide (TiO 2 ) was prepared using hydrothermal method. The crystallite structure was characterized by X-ray diffraction (XRD), which showed the TiO 2 have two phases anatase and rutile. Field-emission scanning electron microscopy (FE-SEM) used to investigate the morphology of TiO 2 , such the images showed that the product have nanorods hexagonal, nanobelts, and nanowires. The different shapes of nanotitanum dioxide on Photocatalyst were studied on degradation of methylene blue dye under UV irradiation , optimum degradation revealed with nanowires shape compare with nanobelts and nanorod shapes.

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