Porous TiO2 Film Electrode Used for Photoelectrocatalytic Degradation of Methyl Orange in NaHCO3 Solution

Wen Jie Zhang; Ke Xin Li

doi:10.4028/www.scientific.net/AMR.230-232.126

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Porous TiO₂ Film Electrode Used for Photoelectrocatalytic Degradation of Methyl Orange in NaHCO₃ Solution

Abstract:

PEG1000 was used as template to prepare porous TiO₂ film by sol-gel method. The functions of applied potential and concentration of NaHCO₃ to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO₂ films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO₂ film. The degradation rate increases with increasing NaHCO₃ concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.