Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 20 3 2024 09 01 Synthesis of Proper Magnetite Nanoparticles for Preparation of Activated Carbon-Based Nanocomposites as Magnetic Adsorbents 161 169 721797 10.22034/ijnn.2025.2014884.2448 EN Fathollah Pourfayaz Department of Renewable Energies and Environment, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran 0000-0001-6297-9603 Ali Gholami Department of Renewable Energies and Environment, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran Farhad Farzan Chemical Processes Design Research Group, ACECR, Faculty of Engineering, University of Tehran, Tehran, I. R. Iran Journal Article 2023 11 02 <em>   In this study, magnetite, barium hexaferrite, coated, and uncoated iron nanoparticles were prepared. These magnetic nanoparticles were characterized through X-ray diffraction (XRD) analysis,  scanning electron microscopy (SEM), and empirical observation of the magnetic properties in practice. The results demonstrated that the barium hexaferrite nanoparticles were magnetically weak and suffered from a cumbersome and costly synthesis process. The uncoated iron nanoparticles were prone to oxidation when exposed to air, and coated iron nanoparticles showed weak magnetic properties. Given their simple synthesis method and strong magnetic properties, magnetite nanoparticles were suitable for magnetizing activated carbon. Toluene adsorption results showed that magnetic adsorbents from activated carbon nanocomposites containing 20% nanoparticles have desirable adsorption. </em> https://www.ijnnonline.net/article_721797_0a888daf723758a9df87c91d6ce22a1d.pdf