A novel synthesis method for manganese ferrite nanopowders: The effect of manganese salt as inorganic additive in electrosynthesis cell |
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| Affiliation: | 1. Physics Department, Faculty of Science, Lorestan University, Lorestan, Iran;2. Physics Department, Faculty of Science, Shahid Chamran University, Ahvaz, Iran;1. Solid State Ionics and Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India;2. Faculty of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea;1. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;2. Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;1. School of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China;2. Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;3. Qinghai Key Laboratory of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China;2. School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, PR China |
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| Abstract: | Manganese ferrite nanoparticles were electro-crystallized in an electrochemical cell containing two iron electrodes, and an electrolyte solution of sodium sulfate, sodium butanoate, and manganese sulfate hydrate. The samples were characterized by X-ray diffraction, electron microscopy, magnetometry, and Mössbauer spectroscopy methods. The crystal structure of the samples was studied using X-ray diffraction. Based on obtained results we found that the manganese ferrite nanoparticles are formed in the electrochemical cell containing 0.001 M manganese sulfate hydrate. Also, the formation of a paramagnetic secondary phase in the sample without manganese is suppressed by adding manganese salt in the electrochemical cell. The nanoparticle size, shape, and morphology were characterized using electron microscopy. Magnetization curves show that all samples are magnetically soft and their specific magnetization ranges from 15 A m2 kg?1 to 75 A m2 kg?1, depending on the growth conditions. Room temperature Mössbauer spectra confirm the formation of nonstoichiometric spinel ferrite of magnetite or manganese ferrite, again depending on the growth conditions. Based on Mössbauer analysis, reduction in the population of octahedral sites provides direct evidence for the presence of the manganese ions substitution in the octahedral sites. |
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| Keywords: | B Electron microscopy B X-ray method C Magnetic properties Manganese ferrite |
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