Synthesis, characterization, and investigation of magnetic and photocatalytic property of cobalt tungstate nanoparticles

Pure CoWO 4 nanoparticles were successfully synthesized by sonochemical method with the aid of cobalt (II) nitrate hexahydrate and sodium tungstate dihydrate in water without adding surfactant, capping agent or template. To the best of authors’ knowledge, it is the first time that CoWO 4 was synthesized by ultrasonic method. The structural, morphological and optical properties of as-obtained products were characterized by techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray microanalysis, and ultraviolet–visible spectroscopy. The samples indicated a paramagnetic behavior, as evidenced by using vibrating sample magnetometer at room temperature. The photocatalytic properties of as-synthesized CoWO 4 were evaluated by degradation of methyl orange as water contaminant.