The photocatalytic degradation of Methyl Orange (Mo) has been investigated in aqueous solutions using thin layers of TiO2 deposited on stainless steel by electrophoresis. The effects of photocatalyst support, pH, the addition of hydrogen peroxide and the addition of peroxodisulfate ions have been investigated. The results suggest that conducting glass was the best photocatalyst support but due to its cost, we privilege the use of the system TiO2/stainless steel. Hydrogen peroxide and peroxodisulfate ions have a positive effect on reaction rate. S2O82- was the best oxidant which allows in a few minutes (~30 min) the total disappearance of MO. Using the best condition for MO degradation; we studied the photocatalytic degradation of Indigo Carmine, an indigoid dye.
Tomkouani Kodom, Etsri Amouzou, Gbandi Djaneye-Boundjou and Limam Moctar Bawa, 2012. Photocatalytic Discoloration of Methyl Orange and Indigo Carmine on TiO2 (P25) Deposited on Conducting Substrates: Effect of H2O2 and S2O82-. International Journal of Chemical Technology, 4: 45-56.