SYNTHESIS, STUDY THE STRUCTURAL CHARACTERSTICS AND CATALYTIC PROPERTIES OF NANOPARTICLES COAL2O4

Abstract

    Cobalt aluminate nano - particles were prepared by solution combustion method, starting from cobalt (II) nitrate, aluminum nitrate and urea. The particles were calcined to temperatures between 500oC and 800oC, for the formation of the mixed oxide having spinel structure. The products were characterized by TGA/DTA techniques, X-ray diffraction, Scanning Electron Microscopy, Transmission Electron Microscopy, Brunauer- Emmett-Teller, Energy Dispersive X-Ray Spectroscopy. The obtained results showed that the products have mesoporous structure with high surface area and nanocrystalline with crystals in the range of 20 - 30 nm. The catalytic activities of CoAl2O4 nanoparticles were investigeted using aqueous solution of red phenol in excess H2O2.

Keyword: Nano - CoAl2O4, combustion, catalytic activity, red phenol.