Synthesis and Characterization of Fe₃O₄/SiO₂ nanocomposites

Abstract

Fe3O4@SiO2 nanocomposites have been synthesized using the Stöber method. X-ray diffraction data analysis showed the addition of SiO2 changed the diffraction pattern peak which represented the existence of Fe3O4 and SiO2 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 Fe3O4 and SiO2 nanoparticles on the sample. Furthermore, the infrared spectrum showed that Fe3O4 and SiO2 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 SiO2.

Potential Application of Fe2O3 and Functionalized SiO2 Nanoparticles for Inhibiting Asphaltene Precipitation in Live Oil at Reservoir Conditions

“…This leads to a diminished self-association tendency of the asphaltenes and thus the absence of enough and effective nucleation sites for growth and precipitation of asphaltene aggregates in the presence of the nanoparticles. 50,51 It is worth noting that the effective nucleation sites are expected to start to form by the self-association/aggregation of the most unstable fraction of the asphaltene in the live oil, followed by aggregation and growth of the nucleates through adsorption of lighter fractions of the asphaltenes. As well, the higher potential of Fe 2 O 3 for control of asphaltene aggregation can be explained by the higher number and strength of the interactions of the iron oxide surface sites with the acidic and basic functional groups of the asphaltene particles.…”

Recent Advances in Magnetite Nanoparticle Functionalization for Nanomedicine

“…There are several methods that can be used for SiO 2 conjugation on magnetite nanoparticles. The most frequently encountered approach is the sol-gel (Stoeber) method, which is based on the hydrolysis of tetraethoxysilane (TEOS) in an alcoholic medium, using ammonia as catalyst [91,92]. The method is popular due to its ease, but also due to the ability to obtain monodisperse-coated nanoparticles, with controlled dimension and shape.…”

Crystal Structure Modelling of Magnetic Material On Computational Study

“…Based on the Figure 1 MnFe2O4 and NiCo2O4 have similar structure, This is because both are included in the binary oxide group, which has two metals bonded to oxygen [11]. Fe3O4 has a very dense structure because there are two types of Fe 2+ and Fe 3+ atoms scattered in octahedral and tetrahedral sites [12].…”