Synthesis and Characterization of Fe3O4/SiO2 nanocomposites

Abstract Fe 3 O 4 @SiO 2 nanocomposites have been synthesized using the Stöber method. X-ray diffraction data analysis showed the addition of SiO 2 changed the diffraction pattern peak which represented the existence of Fe 3 O 4 and SiO 2 nanoparticles. Based on the elemental analysis, it can be seen that Si compositions on the samples were 14.7 % (S1), 19.8% (S2), and 20.4% (S3). It strengthens the existence of Fe 3 O 4 and SiO 2 nanoparticles on the sample. Furthermore, the infrared spectrum showed that Fe 3 O 4 and SiO 2 molecular functional groups were recorded at the wavenumber of 548 cm −1 with Fe-O-Si bond. Furthermore, Fe-O bond was recorded at the wavenumber of 461 cm −1 . Meanwhile, Si-O-Si and Si-O bonds were detected at the wavenumbers of 1102 cm −1 and 949 cm −1 respectively. Furthermore, the data from UV-Vis characterization presented the peak shifted towards a higher angle of the wavelength which indicated that there is a phenomenon of changes in band gap particle size along with increased content of SiO 2 .