Synthesis of Magnetic Iron-oxide Nanoparticle through Micro emulsion for Environmental Application

Abstract

The magnetic iron oxide nanoparticles was synthesized by microemulsion with variation of process parameters . A microemulsion is prepared by dissolving AOT in iso-octane, followed by addition of 1butanol and then FeCl2 aqueous salt solution. The system has to be stirred slowly until a transparent micro emulsion suspension is formed. The same procedure was followed to prepare second micro emulsion that contains NaOH solution. This two micro emulsion system are mixed at a volumetric ratio of 1:1 and precipitation is formed. The particles are recovered, and washed with deionized water and acetone and dried. The whole synthesis exeresize are repeated for various changing process parameters such as w = [water]/[surfactant] mole ratio, change in surfactant, change in reactant concentration and change in oil chain length. The material so obtained is characterized and found to have in the range of 20-50 nm. The material is subsequently used to remove the arsenic from contaminated water and have 99 percent removal efficiency.