Photocatalytic degradation of VOC by Titanium dioxide Nanotube photocatalysts

摘要

Titanium dioxide Nanotube (TNT) has been widely used and investigated but properties associated with this catalyst are yet to be fully understood. In this study, the physicochemical properties of the TNT catalyst were investigated and the rates of photocatalytic removal of acetone with TNT were also calculated. The surface area of catalysts was also analyzed in this study. TNT nanotubes were prepared by a modified hydrothermal method, using a mixture of TiO_2, nitrate nonohydrate and deionized water as a solvent. Physicochemical properties of the TNT were investigated by N_2 adsorption/desorption surface area analyzer (BET), UV-vis diffuse reflectance spectroscopy (UV-vis), X-ray diffraction analysis (XRD) and High-Resolution Transmission Electron Microscope (HR-TEM). The TNT catalyst was used to treat acetone of 1000ppm, the residence time of 1.0, 1.33, 2.0, 4.0 minutes and the adsorption efficiency could reached 40 ～ 50%. Furthermore, the photocatalytic degradation efficiency ranged from 60 to 80 % at the same condition under 365 nm.