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Synthesis and characterization of tungsten oxide nanoparticles from the origin of WC-%6Co scrapes by a sol-gel method
Paper ID : 1458-UFGNSM-FULL
Authors:
Abstract:
In current research work WC-%6Co scraps were employed as starting materials for synthesizing tungsten oxide (WO3) nanoparticles. As a medium product sodium tungstate (Na2WO4) was prepared by alkaline fusion of WC-%6Co scrapes at 650-700°C. Then sodium tungstate solution was let to flow through a glass column packed with protonated cation-exchange resin. The effluent was dropped in an oxalic acid solution and after stirring for 24 hours at room temperature, the clear solution was heated at 150°C. The subsequent calcination of white dried powders at 500°C for 6 hours, caused the formation of yellow tungsten oxide. Phase identification, average particle sizes and purity of WO3 nanoparticles were characterized by X-ray diffraction, field emission scanning electron microscopy and energy dispersive spectroscopy analysis methods. It was found that pure WO3 nanoparticles with average particle size of 80 nm were successfully synthesized. The most figure of merit of this work is to use WC-%6Co scrapes as starting materials to fabricate WO3 nanopowders.
Keywords:
tungsten oxide, scrapes, sol-gel
Status : Paper Accepted (Poster Presentation)