Preparation of TiO2/ITO film by liquid phase deposition and its photoelectrocatalytic activity for degradation of 4-aminoantipyrine
(Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,
School of Chemistry and Biological Engineering, Changsha University of Science and Technology,
Changsha 410004, China)
School of Chemistry and Biological Engineering, Changsha University of Science and Technology,
Changsha 410004, China)
Abstract: A thin layer of TiO2 film was deposited on ITO surface via the liquid phase deposition (LPD) process. The photocurrent and electrochemical impedance spectroscopy (EIS) measurements indicated that the as-prepared LPD TiO2/ITO film had an excellent photoelectrochemical performance, which showed a sensitive and rapid response to the UV irradiation. The photogenerated electron-hole pairs could be effectively separated by applying an external bias to the TiO2 film electrode. The LPD TiO2/ITO film was employed to study the photoelectrocatalytic (PEC) degradation of 4-aminoantipyrine. Compared with other techniques, the PEC technique based on such a LPD film electrode had a synergetic effect for 4-aminoantipyrine degradation. When the applied bias potential was +0.8 V and the supporting electrolyte concentration of Na2SO4 was 0.1 mol/L, the highest degradation efficiency within 120 min could reach 95% for 0.1 mmol/L 4-aminoantipyrine solution at pH 2.0.
Key words: liquid phase deposition; TiO2 film electrode; photoelectrocatalysis; 4-aminoantipyrine