Hedayat Gholami - School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, Tehran,۱۴۱۷۶۱۴۴۱۸, Iran.
Hassan Koohestani - Faculty of Material and Metallurgical Engineering, Semnan University, Semnan, Iran.
Mehdi Ahmadi - Jam Petrochemical Company, Assaluyeh, Boushehr, Iran.

In this research, using impregnation method, spinel cobalt and copper ferrites nanoparticles are synthesized on the surface of hematite. Synthesized powders were characterized and examined by FTIR, XRF, XRD, FESEM, BET and EDS analysis and the dye degradation were investigated by UV-vis and AAS methods. Specific surface area increased especially in the sample containing cobalt, which indicates the precise of synthesis and the creation of high surface nano particles at hematite surface. The size of particles was in the nano scale and a good uniformity observed in the structure. The results indicated a significant increase in the catalytic ability of hematite nano composite after synthesis. Their catalytic capability investigated by the Fenton reaction with complete removal of methylene blue from the solution via UV-vis irradiation. The samples stability discovered to be excellent by the AAS method.

impregnation method, hematite/CuFe۲O۴, hematite/CoFe۲O۴, spinel ferrites, Fenton reaction.