Preparation of Ag Loaded WO3 Nano Rod and Its Highly Efficient Degradation of Flumequine under Sunlight Irradiation
Somayeh Saleh Fekr
1
(
Department of Chemical engineering, Faculty of engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
)
Mehdi Ardjmand
2
(
Chemical Engineering Department , South Tehran Branch ,Islamic Azad University, Tehran,Iran
)
Reza Fazaeli
3
(
Department of Chemistry, Faculty of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
)
Mehdi Rafizadeh
4
(
Department of Polymer Engineering & Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
)
Keywords: Degradation, response surface methodology, Photocatalyst, Ag/WO3,
Abstract :
The aim of this study was to evaluate the efficiency of Ag/WO3 photocatalytic process for degradation of Flumequine (FL) antibiotic from aqueous solutions. In this study, WO3 and Ag/WO3 particles were synthesized and characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS)/Map, Brunauer, Emmett, Teller (BET)/Barrett, Joyner, Halenda (BJH) and UV–vis diffuse reflectance spectroscopy (DRS) techniques. The photocatalytic degradation of FL from aqueous solutions was studied by Ag/WO3 photocatalyst under sunlight irradiation. The response surface methodology (RSM) with Central Composite Design (CCD) with 4 variables was used to investigate the relationship between the obtained responses and process variables and optimize with Design Expert software. In this study, the effect of pH, time (min), photocatalyst mass (g) and FL concentration (mg/L) were evaluated at 5 levels. Finally, the software is the best point to achieve the highest degradation efficiency of FL 99.54%, in optimal conditions at pH 3.07, time 101.14 (min), photocatalyst mass 0.13 (g) and FL concentration 41.3 (mg/L).