| Title |
Evaluation of OH Radical Generation to Nanotube Morphology of TiO2 Nanotube Plate |
| Authors |
이용호 ( Yongho Lee ) ; 박대원 ( Daewon Pak ) |
| DOI |
https://doi.org/10.15681/KSWE.2016.32.5.403 |
| Keywords |
Anodization; Electric Current; Photocatalyst; TiO2; TiO2 nanotube plate |
| Abstract |
In this study, a TiO2 nanotube was grown on a titanium plate by using anodic oxidation method for the evaluation of TiO2 nanotube morphology. The TiO2 nanotube was grown in an electrolyte containing ethylene glycol, 0.2 wt% of NH4F and 2 vol% of H2O. Applied voltage varied from 30 to 70 V and the morphology of the TiO2 nanotube was observed. After anodi zation, a TiO2 nanotube plate was immersed in 35°C ethanol for 24 hours. Anatase and rutile crystal forms of TiO2 nanoutbe were observed after annealing. 4-chrolobenzoic acid, a probe compound for OH radicals, was dissolved in H2O in order to measure the OH radical. Liquid chromatography was used to check the concentration of the 4-chrolobenzoic acid. The OH radical generation by TiO2 nanotube plate was proportionate to the length of the TiO2 nanotube. Furthermore, when the number of TiO2 nanotube plate increased, the OH radical generation increased as well. |