Effect of Stabilizing Agent of Sodium Citrate and Polyethylene Glycol on Structure of Fe3O4 Nanoparticles
Penulis/Author
Prof. Drs. Roto, M.Eng, Ph.D. (1); Prof. Dra. Eko Sri Kunarti, M.Si., Ph.D. (3); Prof. Suherman, S.Si., M.Sc. Ph.D. (4)
Tanggal/Date
24 2020
Kata Kunci/Keyword
Abstrak/Abstract
Magnetic nanomaterials are studied extensively because of their wide range of possible
applications. Synthesis of Fe3O4 with citrate and polyethylene glycol (PEG) as stabilizing agents was
carried out. In this study, the effect of media of water, sodium citrate and polyethylene glycol as
stabilizing agents on the shape and size of Fe3O4 magnetite nanoparticles was investigated. The
synthesis of Fe3O4, Fe3O4/citrate, and Fe3O4/PEG was carried out by the coprecipitation method at
controlled pH. The products were characterized by infrared spectrophotometry, X-ray Diffraction
(XRD), Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy-Energy
Dispersive X-Ray (SEM-EDX). Qualitative test of magnetism was also carried out on the three
materials. The results showed that Fe3O4 nanoparticles prepared with sodium citrate and PEG have a
diameter of 12 and 10 nm, respectively. In the sodium citrate medium, it gives Fe3O4 colloidal
nanoparticle with electrostatic stabilization mode, while in the PEG medium it shows steric
stabilization mode. Magnetite produced in PEG medium has the homogeneous size and is much more
stable than that obtained in citrate medium
