Journal
ULTRASONICS SONOCHEMISTRY
Volume 34, Issue -, Pages 754-762Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2016.07.011
Keywords
Ball milling process; Magnetite nanostructures; Sono-Fenton; Sonocatalyst
Categories
Funding
- University of Tabriz (Iran)
- Ataturk University (Turkey)
- Center for International Scientific Studies & Collaboration (CISSC)
Ask authors/readers for more resources
High energy planetary ball milling process was used to prepare magnetite nanostructures from natural magnetite. The natural and ball-milled magnetite samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET) and Fourier transform infrared spectroscopy (FT-IR). The results of EDX indicated the presence of main elements including Fe and O in the structure of both unmodified and milled magnetite samples. The specific surface area of catalyst increased from 0.9116 m(2)/g to 28.692 m(2)/g after ball-milling process. The catalytic activity of prepared magnetite nanostructures was evaluated towards degradation of Acid Blue 185 (AB185) in ultrasonic assisted heterogeneous Fenton reaction. 6 h ball-milled catalyst exhibited the higher catalytic activity in degradation of AB185. The high degradation efficiency was obtained at initial pH of 3. Increasing the concentration of H2O2 from an optimum value of 15 mM led to decrease in degradation efficiency because of scavenging effect of H2O2 on hydroxyl radicals. The optimized catalyst concentration was obtained 1.5 g/L. Increasing initial dye concentration from 20 to 120 mg/L led to decrease in degradation efficiency from 99 to 88%. The prepared magnetite nanostructures exhibited good stability in repeated cycles. The produced intermediates of the degradation of AB185 in ultrasonic assisted heterogeneous Fenton process were monitored by GC-MS analysis. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available