Simple route for preparation cobalt tungstate nanoparticles with different amino acids and its photocatalyst application
Tóm tắt
Nanoparticles sphere-like cobalt tungstate (CoWO4) have been successfully synthesized via the co-precipitation method process by using cobalt (II) nitrate hexahydrate and Na2WO4⋅2H2O. Capping agents are frequently used in colloidal synthesis to inhibit nanoparticle overgrowth and aggregation as well as to control the structural characteristics of the resulted nanoparticles in a precise manner; therefore, valine, glycine, and alanine were applied as capping agents. Besides, the effect of valine, glycine, and alanine on the morphology and size of final products were investigated by SEM analysis. According to the vibrating sample magnetometer, cobalt tungstate nanoparticles indicated a paramagnetic behavior at room temperature. The morphology and particle size of products were investigated by SEM images, XRD patterns, UV–Vis and EDS spectroscopy. The photocatalytic characteristics of as-obtained nanocrystalline cobalt tungstate were also examined by degradation of methyl orange (MeO) dye as water contaminant.
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