| Title |
A Study on the Possibility of Dye Wastewater Treatment of Electrical Photocatalytic System Using TiO2 nanotube plate |
| Authors |
이용호 ( Yongho Lee ) ; 쑨밍하오 ( Minghao Sun ) ; 박대원 ( Daewon Pak ) |
| DOI |
https://doi.org/10.15681/KSWE.2019.35.5.418 |
| Keywords |
Decolorization efficiency; Dye wastewater; Photoelectrolysis; TiO2 nanotube plate |
| Abstract |
In this study, TiO2 nanotubes with different morphologies were prepared in the electrolyte consisting of ethylene glycol, ammonium fluoride(NH4F), and deionized water(H2O) by controlling the voltage and time in the anodization method. Thicknesses and pore sizes of these TiO2 nanotubes were measured to interpret the relationship between anodization conditions and TiO2 nanotube morphologies. Element contents in the TiO2 nanotubes were detected for further analysis of TiO2 nanotube characteristics. Photoelectrolyticdecolorization efficiencies of the TiO2 nanotube plates with various morphologies were tested to clarify the morphology that a highly active TiO2 nanotube plate should have. Influences of applied voltage in photoelectrolysis processes and sodium sulfate(Na2SO4) concentration in wastewater on the decolorization efficiency were also studied. To save the equipment investment cost in photoelectrolysis methods, a two-photoelectrode system that uses the TiO2 nanotube plates as photoanode and photocathode instead of adding other counter electrodes was studied. Compared with single-photoelectrode system that uses the TiO2 nanotube plate as photoanode and titanium plate as cathode on the view of the treatment of dye wastewater containing different amounts of salt. As a result, a considerably suitable voltage was strictly needed for enhancing the photoelectrolyticdecolorization effect of the two-photoelectrode system but if salts exist in wastewater, an excellent increase in the decolorization efficiency can be obtained. |