Enhanced photocatalytic degradation of 2,4-dichlorophenol in water solution using Sr-doped ZnAl2O4 nanoparticles
Publish place: Journal of Particle Science & Technology، Vol: 4، Issue: 2
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JPST-4-2_005
تاریخ نمایه سازی: 3 دی 1398
Abstract:
ZnAl2O4 and Sr-doped ZnAl2O4 nanoparticles were synthesized by co-precipitation using ammonia as precipitating agent, followed by thermal treatment at 700°C. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and the Brunauer-Emmett-Teller (BET) were employed to clarify the structure and morphology of the samples. In addition, the presence of Sr in Sr-doped ZnAl2O4 NPs was further evidenced from energy-dispersive X-ray analysis (EDX). The Photocatalytic activity of ZnAl2O4 and Sr-doped ZnAl2O4 nanoparticles were evaluated in the photo-catalytic degradation of 2,4-dichlorophenol (2,4-DCP) in aqueous media under the UV irradiation technique. The effect of various parameters, including catalyst dosage, 2,4-DCP concentration, pH, and temperature, on the degradation of 2,4-DCP was investigated. With 0.6 wt% Sr doped ZnAl2O4 samples after 60 min irradiation, 100% of 2,4-DCP photodegradation was observed in acidic conditions, while with undoped ZnAl2O4 samples only 67% 2,4-DCP was removed upon UV irradiation for 200 min. The reusability of the catalyst was examined under optimized conditions. The results demonstrate that Sr-doped ZnAl2O4 nanoparticles exhibit considerably high catalytic stability with more than 90% degradation after the third catalytic cycle.
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Authors
Morteza Ziyaadini
Department of Marine Chemistry, Faculty of Marine Science, Chabahar Maritime University, Iran
Mir Mahdi Zahedi
Department of Marine Chemistry, Faculty of Marine Science, Chabahar Maritime University, Iran
Azadeh Dehghan-Rahimi
Department of Marine Chemistry, Faculty of Marine Science, Chabahar Maritime University, Iran
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