Synthesis of a-Fe2O3 Nano Powders by Novel UV Irradiation Method

Abstract

Alpha phase of iron oxide nanoparticles with different sizes from 10 to 45nm were synthesized by photolysis technique. Salicylaldehyde and amino phenol were used as started material to produce Schiff base which coordinate with iron metal to prepare complex. Nanoparticles were prepared by photolysis the ferric complex and calcined its salt. The result was showed reaction type oxidation-reaction due to transfer the charge from iron to ligand and convert ions for iron from +3 to +2. The irradiation system that used to prepare nanoparticles is 125 watts, ice bath was used to avoid high temperature and ensure happens photoreaction just. From the results, shift for C=N bond toward high frequency after irradiation was occur due to electronegativity of ferrous ions that product and the results from UV-visible technique obtained many type of transition for ligand and it complex at different wavelength. Energy gap for nanoparticles was determined by using UV-Vis while the morphology and average of nanoparticles were characterized by using AFM and TEM respectively. The identity of oxide was characterized by using XRD.