Photo-Catalytic Properties Of Nanotubes Synthesized Using Tio2 Nanoparticles

Up to now, microstructure changes of photocatalysts have been studied to improve photocatalytic activity. Especially, to improve the adsorption of reactants and reactive sites, porous and fine crystal structures have received much attention because of their large specific surface area. In this study, TiO2 nanotubes were synthesized by hydrothermal method using TiO2 nanoparticles; nanotubes were evaluated by oxidized methylene blue reduction test. Using synthesized TiO2 nanotubes, results of TEM showed that the TiO2 nanoparticles were changed into folding sheets and nanotubes. XRD results showed that the peaks of the nanoparticles almost disappeared and only the rutile (110) and anatase (200) peaks were observed. Comparison of photocatalytic properties of nanoparticles and nanotube structures was performed by measuring the UV-vis absorbance with reducing oxidized methylene blue. As a result, the reduction rate of nanotubes was found to be 0.24 mu mol/s, which was 2.6 times higher than the rate of reduction of nanoparticles.