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Effect of Synthesis Parameters on the Structure and Magnetic Properties of Magnetic Manganese Ferrite/Silver Composite Nanoparticles Synthesized by Wet Chemistry Method

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In the present work, magnetic manganese ferrite/silver (MnFe2O4–Ag) composite nanoparticles were synthesized by wet chemistry method. This synthesis process consists of two steps: first, the seed of manganese ferrite nanoparticles (MnFe2O4 NPs) was prepared by a coprecipitation method; second, growth of silver nanoparticles (AgNPs) on the MnFe2O4 seed by modified photochemical reaction. We have conducted systematically the effects of synthesis parameters such as pH value, synthesis time, precursor salts concentration, mass ratio and stabilizing agents on the structure and magnetic properties of nanocomposites. In an optimized condition of synthesis parameters, the high quality MnFe2O4 NPs are obtained at pH value = 13, Mn2+ cation concentration = 0.4 M and synthesis time about 105 min; and the use of PVP stabilizing agent is found to optimize the formation of Ag-NPs on the surface of MnFe2O4 NPs. The as-prepared MnFe2O4–Ag magnetic nanocomposites display excellent properties of high crystallinity, long-term aggregation stability in aqueous medium, large saturation magnetization in the range of 15–20 emu/g, and small sizes of Ag-NPs ∼ 20 nm. These exhibited properties made the MnFe2O4–Ag nanocomposites attractive candidate for various technological applications in biomedicine, catalyst and environmental monitoring.
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Keywords: Coprecipitation; Ferromagnetic; Magnetic Nanocomposites; MnFe2O4–Ag; Photochemical

Document Type: Research Article

Affiliations: 1: Department of Nanoscience and Nanotechnology, Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), Hai Ba Trung District, Hanoi 10000, Vietnam 2: Faculty of Chemistry and Environment Technology, Hung Yen University of Technology and Education, Hung Yen 16000, Vietnam 3: Tien Giang University, My Tho City, Tien Giang Province 86000, Vietnam 4: Department of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi 10000, Vietnam 5: Institute of Physics at Ho Chi Minh City, Vietnam Academy of Science and Technology (VAST), Ho Chi Minh 70000, Vietnam 6: Department of Micro-and Nanotechnology, Technical University of Denmark Building 345Ø, Ørsted Plads, Kgs Lyngby 2800, Denmark

Publication date: 2016-08-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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