| 초록 |
Among many free metal ions mediators, peroxydisulfuric acid (H2S2O8) has high oxidation potential 2.1 V (NHE), which can be used as effective removal of air pollutants. Because of commercial unavailability of peroxydisulfuric acid, it must be prepared according to the requirement. One way to prepare peroxydisulfuric acid is in-situ preparation from H2SO4 through electrolysis. The present work focuses on the effect of different combination of electrodes and sizes for effective preparation of H2S2O8 from high concentration H2SO4 using electrolysis. First, current density, temperature, 7.5 M H2SO4, and fixed anode (BDD electrode) are kept constant. At different cathodes like Ti, Zr, Cu, and Pt variation, the effect of H2S2O8 formation studied. The formation of H2S2O8 confirmed via ORP electrode by reduction potential variation. The formation efficiencies calculated using titration with FeSO4 and KMnO4. Additionally, cyclic voltammetry, FT-IR, and UV-Visible analyses of the solution paved a way to support the suitable electrode on effective formation of H2S2O8. Finally, there will be a discussion on the electrode and their size dependence of H2S2O8 formation. |
