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.Key words: Fe2O3, Nano powder, Salicylaldehyde (C7H6O2amino phenol (C6H7NO), 125W lamp, Uv-irradiation.

materials have been studied to remove the deadly heavy metals from wastewaters, which is one of the promising sustainable mitigation methods 6) . Chromium ions and other heavy metals were removed using a variety of methods, such as adsorption 7,8) , membrane filtering 9) , advanced oxidation 10) , and precipitation 11,12) . Due to its low cost and economy, adsorption is a suitable method for reducing the level of Cr ions. Its effectiveness is dependent on the number of sites that can be combined with adsorbate ions 13) . Nanocomposites produced by the photolysis technique 14−22) are viable options for the adsorption of certain heavy metals from water 23−25) due to their higher specific area and porosity. Heavy metal reduction or removal from water can be accomplished using chitosan-based nanoparticles as an effective catalyst (adsorbate) 26,27) . Chitosan nanosheets have recently been suggested for use in several wastewater treatment processes 28) . Additionally, chitosan s matrix was doped with or mixed with inorganic nanoparticles like TiO 2 and ferrite. For instance, TiO 2 was integrated into CS nanosheets to absorb heavy ions from wastewater.