Author/Authors :
Hemmati Borji، Saeedeh نويسنده 1Department of Environmental Health Engineering, School of Public Health and Center for Water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran , , Nasseri، Simin نويسنده 1Department of Environmental Health Engineering, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Mahvi، Amir Hossein نويسنده Department of Environmental Health Engineering, School of Health; National Institute of Health Research; Center for Solid Waste Research, Institute fo , , Nabizadeh، Ramin نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Javadi، Amir Hossein نويسنده Nanotechnology department, Engineering Research Institute, Tehran, Iran ,
Abstract :
In this study Fe (III)-doped TiO2 nanoparticles were synthesized by sol–gel method at two atomic ratio of Fe/Ti,
0.006 and 0.034 percent. Then the photoactivity of them was investigated on degradation of phenol under UV
( < 380 nm) irradiation and visible light ( > 380 nm). Results showed that at appropriate atomic ratio of Fe to Ti (%
0.034) photoactivity of Fe(III)–doped TiO2 nanoparticles increased. In addition, the effects of various operational
parameters on photocatalytic degradation, such as pH, initial concentration of phenol and amount of photocatalyst
were examined and optimized. At all different initial concentration, highest degradation efficiency occurred at
pH = 3 and 0.5 g/L Fe(III)–doped TiO2 dosage. With increase in initial concentration of phenol, photocatalytic
degradation efficiency decreased. Photoactivity of Fe (III)-doped TiO2 under UV irradiation and visible light at
optimal condition (pH = 3 and catalyst dosage = and 0.5 g/L) was compared with P25 TiO2 nanoparticles. Results
showed that photoactivity of Fe(III)-doped TiO2 under visible light was more than P25 TiO2 photoactivity, but it was
less than P25 TiO2 photoactivity under UV irradiation. Also efficiency of UV irradiation alone and amount of phenol
adsorption on Fe(III)-doped TiO2 at dark condition was investigated.
