Sonochemical synthesis and characterization of Co3O4 nanocrystals in the presence of the ionic liquid [EMIM][BF4] |
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| Affiliation: | 1. School of Applied Physics, Faculty of Science & Technology (FST), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia;2. Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia;1. Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;2. Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand;1. Department of Chemical Engineering, Indian Institute of Science Education and Research, Bhopal 462 066, Madhya Pradesh, India;2. Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620 015, Tamil Nadu, India;3. Department of Chemical Engineering, Indian Institute of Technology, Guwahati 781 039, Assam, India;1. Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong Special Administrative Region;2. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong Special Administrative Region;1. Department of Chemistry, Dibrugarh University, Dibrugarh, 786004, Assam, India;2. Academy of Scientific and Innovative Research (AcSIR)‐Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research (CSIR), G. B. Marg, Bhavnagar, 364002, Gujarat, India;1. Institute of Physics, Azerbaijan National Academy of Sciences, AZ – 1143 Baku, Azerbaijan;2. Bahcesehir University, Faculty of Engineering and Natural Sciences, Beşiktaş, 34353 Istanbul, Turkey;3. Department of Physics, Gebze Technical University, Gebze 41400, Kocaeli, Turkey |
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| Abstract: | For the first time, a sonochemical process has been used to synthesis cobalt oxide Co3O4 nanoflowers and nanorods morphology in the presence of the ionic liquid 1-Ethyl-3-methylimidazolium tetrafluoroborate [EMIM][BF4] as reaction media and morphology template. Different sonication time periods and different molar ratios of the ionic liquid (IL) were used to investigate their effects on the structural, optical, chemical and magnetic properties of the produced Co3O4 nanoparticles. During synthesis process brown powder contains cobalt hydroxide Co(OH)2 and cobalt oxyhydroxide (Cobalt hydroxide oxide) CoO(OH) was formed, after calcination in air for 4 h at 400 °C a black powder of Co3O4 nanoparticles was produced. The produced Co3O4 nanoparticles properties were characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), transmission electron microscopy (TEM), FTIR spectroscopy, UV–vis spectroscopy, and Vibrating Sample Magnetometer (VSM). To explain the formation mechanism of Co3O4 NPs some investigations were carried on the brown powder before calcination. |
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| Keywords: | Cobalt oxide Ionic liquids Sonochemical method Nanorods Nanoflowers |
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