Preparation and Characterization Iron Oxide (Fe3O4) Magnetic Nano Particleg
Introduction: Nanotechnology is enabling technology that deals with Nano-meter sized objects. It is expected that nanotechnology will be developed at several levels: Materials, devices and systems. The nanomaterial’s level is the most advanced at present, both in scientific knowledge and in commercial applications. A decade ago, nanoparticles were studied because of their size-dependent physical and chemical properties.
Aim: To consider magnetite nanoparticles, their applications, synthesis and characterization methods; to synthesis magnetite nanoparticles; to characterize magnetite nanoparticles by different techniques.
Materials and methods: The most conventional method for obtaining Fe3O4 or γ-Fe2O3 is by co-precipitation. This method consists of mixing ferric and ferrous ions in a 1:2 molar ratio in highly basic solutions at room temperature or at elevated temperature.
Results and discussion: Particle size is measured by zetasizer. The average distribution of magnetic nanoparticles is 11 ± 2 nm. Thus, we can know size of particle. Reveal size, shape and distribution on the solution are measured by transmission electron microscopy (TEM). The following distribution was calculated from the distribution of NPs the average 13 ± 2 nm. Thus, we see size and shape nanopartical. The ζ (Zeta) potential of magnetite nanoparticles was –24 ± 2 mV at pH 6.5 ± 0.1. The size distribution of nanoparticles was studied by the methods of dynamic light scattering.
Conclusion: The resulting nanoparticles were measured using dynamic scattering light and transmission electron microscopy. Average values respectively, amounted to 11 ± 2 nm and 13 ± 2 nm. Zeta has also been measured. Its average value was -24 ± 2 mV at pH=6.5 ± 0.1. What is caused by the presence of carboxylic groups of citric acid on surface of nanoparticles? Such a value of the zeta potential is sufficient for prevent the adhesion of nanoparticles.