کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6664286 | 1427045 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal synthesis of Fe-TiO2-Ag nano-sphere for photocatalytic degradation of 4-chlorophenol (4-CP): Investigating the effect of hydrothermal temperature and time as well as calcination temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
This work aimed to synthesize Fe-TiO2-Ag nano composite by a novel ultrasonic assisted hydrothermal method followed by evaluation of its efficiency for photocatalytic degradation of 4-chlorophenol (4-CP) in aqueous solution. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and N2 adsorption-desorption (BET) methods were performed to characterize the as-prepared materials. The catalysts with different ratios of Fe and Ag were synthesized and evaluated based on photocatalytic activity for 4-CP removal under UV irradiation. Response surface methodology (RSM) was used to determine the effect of operational parameters for photocatalytic degradation of 4-CP under UV irradiation. The optimum values of Fe and Ag were chosen as 0.3 and 2%wt. Fe-TiO2-Ag photocatalyst showed considerable enhancement in the degradation of 4-CP compared to bare nano TiO2. The optimum conditions for maximum degradation of 4-CP and minimum dosage of catalyst were obtained via the RSM to be the time of 165Â min, pH of 4.86, C4-CP of 40.4Â mg/L and Ccat. of 1.5Â g/L. Degradation at the optimum condition correlated 95.25% compared with the experimental amount of 97.12%, which illustrated the good accuracy. Furthermore, the stability and reusability of the synthesized catalysts were studied and demonstrated only 3% decrease in removal efficiency after five cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 5, Issue 5, October 2017, Pages 4564-4572
Journal: Journal of Environmental Chemical Engineering - Volume 5, Issue 5, October 2017, Pages 4564-4572
نویسندگان
Amir Shojaie, Moslem Fattahi, Sahand Jorfi, Bahram Ghasemi,