Photocatalytic Degradation of ۲,۴-Dichlorophenoxyacetic Acid Using Fe<SUB>۲</SUB>O<SUB>۲</SUB>/CeO<SUB>۲</SUB>/Ag Composite Nanoparticles under Ultraviolet
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 211
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شناسه ملی سند علمی:
JR_JAEHR-9-3_003
تاریخ نمایه سازی: 22 آذر 1400
چکیده مقاله:
Background: The herbicide ۲,۴-dichlorophenoxyacetic acid (۲,۴-D) is used to control of agricultural pests (water and soil) and is among the most widely distributed pollutants in the environment. Methods: In this study, Fe۲O۳/CeO۲/Ag composite nanoparticles were synthesized using a simple coprecipitation method. The as-synthesized samples were examined using X-ray diffraction, field emission scanning electron microscopy, and X-ray analysis. The photo catalytic activity of the as-synthesized samples was examined through photo degradation of ۲,۴-dichlorophenoxyacetic acid (۲,۴-D) under ultraviolet irradiation. The effects of pH, irradiation time, initial ۲,۴-D concentration and catalyst dose on the photo catalytic performance of Fe۲O۳/CeO۲/Ag composite nanoparticles were investigated through an optimization process. The photo catalytic reaction kinetic data were analyzed using Langmuir-Hinshelwood model, and the absorption equilibrium was examined by Langmuir and Freundlich isotherm models. Results: The results suggested the second order reaction kinetics as the best model for ۲,۴-D photo degradation. Moreover, Langmuir isotherm with a higher R۲ was reported as the most suitable model. The photo catalytic activities revealed the highest photo degradation percentage for Fe۲O۳/CeO۲/Ag composite nanoparticles with a degradation order as Fe۲O۳/CeO۲/Ag (۷۵.۷۰%)>Fe۲O۳/CeO۲ (۳۶.۲۸%) >CeO۲ (۲۶.۹۲)>Fe۲O۳ (۱۱.۹۶). Conclusions: Based on the determination of nanomaterial efficiency, its components and photo catalytic properties, can be used to remove this contaminant and other toxic compounds.
کلیدواژه ها:
نویسندگان
Zohreh Karimipour
Department of Environmental Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Reza Jalilzadeh Yengejeh
Department of Environmental Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Azadeh Haghighatzadeh
Department of Physics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Mohammad Kazem Mohammadi
Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Maryam Mohammadi Roozbahani
Department of the Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
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