Characterization structure of Fe3O4@PEG-4000 nanoparticles synthesized by co-precipitation method

Abstract

Magnetic nanoparticles (Fe3O4) from natural iron sand with PEG-4000 have been successfully synthesized by the co-precipitation method. Natural iron sand was from Kulon Progo beach. Extraction of natural iron sand was separated with a magnet permanent as a precursor. The result of extraction was dissolved by acid chloride (HCl) solution. Precipitation process has been finished after added ammonium hydroxide (NH4OH) solution and added polyethylene glycol (PEG)-4000. This solution was dried until it formed a black precipitate. Magnetic nanoparticles were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), and Fourier Transform Infra-Red (FTIR). The quantitative and qualitative analyzes on XRD were using the Profex 4.2.0 application and Joint Committee Powder on Diffraction Standards (JCPDS) No. 19-0629, respectively. Fe3O4 nanoparticles were successfully formed as indicated by the bonding of Fe-O. The results obtained in this study were the crystalline size of 11-13 nm with lattice parameters of 8.3758 Å for Fe3O4 and 8.3589 Å for Fe3O4 added with PEG. Fe nanoparticles were more dominant with wt% above 65%, which was confirmed by the EDX results. The addition of PEG mass resulted in the smaller crystallite size of the nanoparticles.