TY - JOUR
T1 - Photocatalytic treatment of a dye solution using immobilized TiO 2 nanoparticles combined with photoelectro-Fenton process
T2 - Optimization of operational parameters
AU - Khataee, Ali R.
AU - Zarei, Mahmoud
AU - Asl, Shahab Khameneh
PY - 2010/10/1
Y1 - 2010/10/1
N2 - Treatment of a dye solution containing C.I. Acid Red 17 (AR17) by photoelectro-Fenton (PEF) combined with photocatalytic process was studied. Carbon nanotube-polytetrafluoroethylene (CNT-PTFE) electrode was used as cathode. The investigated photocatalyst was Millennium PC-500 TiO2 with crystallites mean size of 5-10 nm immobilized on non-woven paper. A comparison of electro-Fenton (EF), UV/TiO2, PEF and PEF/UV/TiO 2 processes for decolorization of AR17 solution was performed. Results showed that color removal follows the decreasing order: PEF/UV/TiO 2 > PEF > EF > UV/TiO2. Response surface methodology (RSM) was employed to assess individual and interactive effects of the four main independent parameters in PEF/UV/TiO2 process. Analysis of variance (ANOVA) showed a high coefficient of determination value (R 2 = 0.978) and satisfactory prediction second-order regression. The optimum initial amount of Fe(III), initial dye concentration, reaction time and applied current were found to be 0.2 mM, 15 mg/L, 36 min and 100 mA, respectively. This study clearly showed that RSM was one of the suitable methods to optimize the operating conditions. Graphical response surface and contour plots were used to locate the optimum point.
AB - Treatment of a dye solution containing C.I. Acid Red 17 (AR17) by photoelectro-Fenton (PEF) combined with photocatalytic process was studied. Carbon nanotube-polytetrafluoroethylene (CNT-PTFE) electrode was used as cathode. The investigated photocatalyst was Millennium PC-500 TiO2 with crystallites mean size of 5-10 nm immobilized on non-woven paper. A comparison of electro-Fenton (EF), UV/TiO2, PEF and PEF/UV/TiO 2 processes for decolorization of AR17 solution was performed. Results showed that color removal follows the decreasing order: PEF/UV/TiO 2 > PEF > EF > UV/TiO2. Response surface methodology (RSM) was employed to assess individual and interactive effects of the four main independent parameters in PEF/UV/TiO2 process. Analysis of variance (ANOVA) showed a high coefficient of determination value (R 2 = 0.978) and satisfactory prediction second-order regression. The optimum initial amount of Fe(III), initial dye concentration, reaction time and applied current were found to be 0.2 mM, 15 mg/L, 36 min and 100 mA, respectively. This study clearly showed that RSM was one of the suitable methods to optimize the operating conditions. Graphical response surface and contour plots were used to locate the optimum point.
KW - Carbon nanotube
KW - Experimental design
KW - Photocatalysis
KW - Photoelectro-Fenton
UR - http://www.scopus.com/inward/record.url?scp=77957129254&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2010.07.017
DO - 10.1016/j.jelechem.2010.07.017
M3 - Article
AN - SCOPUS:77957129254
SN - 1572-6657
VL - 648
SP - 143
EP - 150
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 2
ER -