Fe3O4 nanoparticles were synthesized at room temperature using a facile precipitation method. Nanoparticles were prepared in reaction time between 2 and 30 min at solvent of water without using inert atmosphere. Magnetite nanoparticles with average diameters of 10 nm were prepared which could be considered in the range of superparamagnetism. Zeolite-Y–Fe3O4 nanocomposites were also prepared using a so-called ‘‘ship-in-bottle’’ procedure. Magnetic properties of the nanoparticles and the zeolite-Y nanocomposite were investigated using an alternating gradient force magnetometer. The results indicate that the synthesized iron oxide nanoparticles exhibit super- paramagnetic behaviour at room temperature, with a saturation magnetization of 19 emu/g. Effect of various surfactants on the morphology was investigated and results show that nanoparticle saturation magnetizations are higher than that of obtained for blank magnetite. It was observed zeolite nanocomposite has paramagnetic property in comparison to super-paramagnetic Fe3O4. Obtained nanocomposite can be used in various applications such as water purification, gas separation and as catalyst in a lot of reactions.
