Synthesis of superparamagetic iron oxide nanoparticles in carbon reduction method

The current paper presents our new approach in synthesizing superparamagetic iron oxide nanoparticles. The Fe₃O₄ nanoparticles (~500nm) are synthesized through carbon reduction method, which is a brand new method. The best parameters of this method are fixed through characterizing transmission electron microscope (TEM), X-Ray Diffraction (XRD) and Vibrating Sample Magnetometer (VSM) of the Fe₃O₄ nanoparticles synthesized under different experimental conditions. The TEM characterization results show that the best ratio of the carbon and ferric chloride is 3:1 and the most suitable calcining time is 3 hours. The nanoparticles, which were obtained with furnace cooling under vacuum condition after 3 hours calcining, have the best magnetic properties and most stable crystal from. Moreover, the quantitative analysis of this new method is taken to confirm the repeatability of this method. The actual qualities of the Fe₃O₄ nanoparticles are always consistent with the theoretical one, which indicates that the repeatability of this method is excellent.