Synthesis of Fe3O4 and Fe3O4-CuO Magnetic Nanopigments by Precipitation Method

Dastjerdi, Z.; Arabi, A. M.; Shafiee Afarani, M.; Ghasemi, E.

Synthesis of Fe3O4 and Fe3O4-CuO Magnetic Nanopigments by Precipitation Method

Authors

¹ Department of Materials Engineering, University of Sistan and Baluchestan

² Department of Inorganic Pigments and Glazes, Institute for Color Science and Technology

³ Department of Material Engineering, University of Sistan and Baluchestan

⁴ Inorganic Pigment and Glazes Department, Institute for Color Science and Technology

Abstract

In the present research, Fe3O4 nanoparticles and Fe3O4-CuO nanocomposite were synthesized by Co-precipitation method under N2 atmosphere in aqueous media. Ammonia and ethylendiamin were used as precipitation agents and Tween 80 as surface modifier. Structural, morphological, magnetic, color and optical properties were studied using XRD, SEM, TEM, VSM, CIE lab and UV-Vis spectrometer, respectively. XRD results showed the Fe3O4 phase in iron oxides samples and Fe3O4 and CuO phases in iron oxide-copper oxide nanocomposite solely. Increase the uniformity of spherical nano magnetite particles was shown by SEM images in the sample synthesized by Tween80 and ethylendiamine. The average crystallite size of Fe3O4 and Fe‌3‌O‌4-CuO samples was 7 and 5 nm, respectively. VSM results showed that the Fe3O4 nanoparticles and Fe3O4-CuO nanocomposites were superparamagnetic with 60 and 40 emu/g magnetization, respectively. Band gap of nanocomposites was estimated about 2.85 eV. TEM micrographs showed that core-shell nanoparticles can be obtained with the size of 12-15 nm. Moreover, color properties showed the increase of hue and chroma values in Fe3O4-CuO nanocomposites indicated the formation of brown inorganic pigments.

Keywords