Combustion Synthesis of Cobalt-doped Zinc Oxide Green Nano Pigments

Rasouli, S.; Arabi, A. M.; Jebeli Moeen, Sh.

Combustion Synthesis of Cobalt-doped Zinc Oxide Green Nano Pigments

Authors

¹ Department of Nanomaterials & Nanotechnology, Institute for Color Science and Technology

² Department of Inorganic Pigments and Glazes, Institute for Color Science and Technology

³ Department of Inorganic pigments and Glaze, Institute for Color Science and Technology

Abstract

In this research nanocrystalline cobalt-doped zinc oxide pigments were prepared via solid reaction and combustion, using glycine as fuel. Obtained powders were characterized by X-ray diffraction, fourier transformation infrared, scanning electron microscopy , transition electron microscope and diffuse reflectance spectroscopy. X-Ray diffraction patterns showed the formation of wurtzite single phase in combustion reaction whereas in the case of solid reaction pure structure appeared after calcinations at 1000 ºC. Crystallite size of the combustion sample was significantly reduced in comparison with the solid reaction samples. Morphological studies using scanning electron and transition electron microscopy revealed that combustion method changes particle size to nano scale ranging from 50 to 100 nm. The colorimetric studies showed a broad reflectance band around 530 nm (green region) for all samples. These results indicated that the samples obtained by combustion reaction have deep green color properties than solid reaction ones. It can be related to smaller crystallite size of nanoparticles in combustion reaction. Fourier transformation infrared results indicated that the main broad band assigned to the zinc-oxygen bond.

Keywords