Study on the properties of cobalt ferrite nanoparticles prepared by co-precipitation and cobalt ferrite/carbon black nanocomposites

Adnan, Nur Atiqah (2022) Study on the properties of cobalt ferrite nanoparticles prepared by co-precipitation and cobalt ferrite/carbon black nanocomposites. [Project Paper] (Submitted)

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Abstract

Cobalt ferrite nanoparticles with the chemical formula of CoFe2O4 and their nanocomposites with carbon black were synthesized by the previous final year project student through the co-precipitation method. Cobalt ferrite nanoparticles, CoF, were sintered at a temperature of 800°C in a carbolite tube furnace for 4 hours. The synthesized cobalt ferrite nanoparticles were mixed with carbon black, CB with different weight percentages of carbon black, such as 2%, 4%, 6%, 8%, and 10% to produce cobalt ferrite/carbon black, CoFCB nanocomposites. The characterization of cobalt ferrite, carbon black, and cobalt ferrite/carbon black nanocomposites for the structural, morphological, optical, magnetic, and electrical properties of the nanocomposites were done by using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Ultraviolet Visible Spectroscopy (Uv-Vis), 2-point probe, and Vibrating Vibrating Sample Magnetometer (VSM). Cobalt ferrite nanoparticles were successfully synthesized as the XRD pattern of CoF shows peaks of single-phase spinel cubic structure of ferrite. There was no secondary phase visible in the XRD analysis of the CoFCB nanocomposite. The particle size distribution of CoF nanoparticles ranges from 50-110 nm with an average particle size of 73 nm. For optical properties, the optical band gap energy of CoF is 1.36 eV while the optical band gap energy of CB is 1.01 eV. With increasing carbon black concentration, the band gap energy of CoFCB nanocomposites decreased from 1.24 eV to 1.04 eV. For electrical properties, the resistivity of CoF is is 6.21 x 106 Ωm and CB is 9.31 x 102 Ωm For conductivity, the conductivity of CB is 1.07 x 10-3 Ωm while the conductivity of CoF is 1.61 x 10-8 Ωm. As the content of carbon black in CoFCB nanocomposite increased, the resistivity decreased while the conductivity increased. The saturation magnetization for CoF was found to be 89.768 emu/g while the saturation magnetization for CB was 2.0797 emu/g. The saturation magnetization value for the CoFCB2% to CoFCB10% nanocomposite ranged between 73.083 emu/g and 102.65 emu/g. For the retentivity of nanocomposites, the value ranged from 37.56 emu/g to 52.229 emu/g. The values of coercivity of nanocomposites varied from 944.83 G to 1179.7 G.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	05 Jun 2024 23:39
Last Modified:	25 Jun 2024 10:17
URI:	http://psaspb.upm.edu.my/id/eprint/1899

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