51 mgg and 1724 mgg respectively sorption kinetic was

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Unformatted text preview: ent concentration, bed depth and flow rate. RO16 showed an unusual breakthrough curve which has a rapid breakthrough initially followed by retention at different influent concentration, bed depth and flow rate. ENV-O4 ENVIROMENTALLY BENIGN SYNTHESIS AND PROPERTIES OF Fe3O4 NANOPARTICLES 1 M. A. Shah and Ahmad Umar 2 1 Department of Physics, Faculty of Sciences, King Abdul Aziz University, Jeddah 21589, Kingdom of Saudi Arabia 2 Department of Chemistry, Faculty of Sciences, Centre for Advanced Materials and Nano -Engineering (CAMNE), Najran University, P. O. Box 1988, Najran 11001, Kingdom of Saudi Arabia E-mail: [email protected] Iron oxide (Fe3O4), as one of the most attractive magnetic materials, has been extensively studied in recent years. This exhibited unique electrical and magnetic properties based on the transfer of electrons 2+ 3+ between Fe and Fe . For their low toxicity, good biocompatibility, and tunable magnetic prop erties, it has received considerable attention in various areas. In addition, the magnetite crystals with diameters of about several hundreds of nanometers which are similar to the size of protein molecules have many important applications in biomedical areas. Due to their good hydrophilic and biocompatible properties, Fe3O4 nanostructures have been considered as an ideal candidate for biological applications such as a tag for sensing and imaging, a drug-delivery carrier for antitumor therapy, and an activi ty agent for medical diagnostics, etc. In this paper, a very new and convenient method has been demonstrated for large-scale synthesis of iron oxide nanorods at 220 °C. The method is based on a very simple reaction of iron and water without using any capping agent or additives. The synthesized Fe3O4 nanoparticles were characterized in detail in terms of their structural and magnetic properties. By detailed structural properties, it was found that the diameters of the nanoparticles are in the range of 70 ±10 nm. The synthesized nanoparticles exhibited good stru...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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