Coating of Carbon Black (CB) and Graphene Oxides (GOs) with Magnetite (Fe3O4)

Levan Chkhartishvili; Natia Barbakadze; Otar Tsagareishvili; Ketevan Sarajishvili; Tamar Korkia; Vakhtang Gabunia; Roin Chedia

doi:10.61797/ijanca.v3i1.330

Levan Chkhartishvili Semiconducting and Powder Composite Materials Laboratory, Ferdinand Tavadze Metallurgy and Materials Science Institute,Department of Engineering Physics, Faculty of Informatics and Control Systems, Georgian Technical University, Tbilisi, Georgia
Natia Barbakadze Laboratory of Chemical Ecology, Petre Melikishvili Institute of Physical and Organic Chemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Otar Tsagareishvili Semiconducting and Powder Composite Materials Laboratory, Ferdinand Tavadze Metallurgy and Materials Science Institute, Tbilisi, Georgia
Ketevan Sarajishvili Laboratory of Chemical Ecology, Petre Melikishvili Institute of Physical and Organic Chemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Tamar Korkia Laboratory of Chemical Ecology, Petre Melikishvili Institute of Physical and Organic Chemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Vakhtang Gabunia Physical and Chemical Processes Research Laboratory, Petre Melikishvili Institute of Physical and Organic Chemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Roin Chedia Semiconducting and Powder Composite Materials Laboratory, Ferdinand Tavadze Metallurgy and Materials Science Institute, Tbilisi, Georgia

DOI: https://doi.org/10.61797/ijanca.v3i1.330

Keywords: Graphene oxide, Reduced graphene oxide, Activated carbon, Magnetite, Magnetic composite

Abstract

Composites containing iron oxides are obtained by the co-precipitation of iron(II) and iron(III) compounds in the presence of different substrates in an alkaline environment. Newly synthesized graphene oxide (GO), reduced graphene oxide (rCO) and carbon black (CB) are used as substrates. Methods of obtaining GO–amorphous iron compound, rGO–Fe₃O₄, and CB–Fe₃O₄ composites are developed. It is determined that rGO–Fe₃O₄ and CB–Fe₃O₄magnetic composites can be obtained at 70–75°C, while in the presence of GO, a non-magnetic composite containing an amorphous iron compound is formed under the same conditions. This composite, when heated in vacuum at 170–175°C, undergoes exfoliation, in result of which a powder composite rGO–amorphous iron compound is formed, the volume of which is 2.7 times greater than that of initial powder. Partial reduction of the formed composite takes place at 550°C and rGO–Fe₃O₄ is obtained. Formation of the magnetite phase is determined by XRD (X-Ray Diffraction) analysis. The structural-morphological study of the synthesized composites is carried out by the SEM (Scanning Electron Microscopy) method. Their magnetic characteristics are studied using VSM (Vibrating Sample Magnetometry) method.