Synthesis and application of CoWO4 nanoparticles for degradation of methyl orange

In the current study, an attempt is made to synthesize cobalt tungstate (CoWO4) nanoparticles via a large-scale and facile precipitation method with the aid of cobalt (II) nitrate and sodium tungstate dihydrate in an aqueous solution. Besides, three surfactant agents such as sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, and ethylene diamine tetra acetic acid were used to investigate their effects on the morphology and particle size of CoWO4 nanoparticles. XRD, SEM, EDS, and UV-Vis spectroscopy were employed to characterize structural, morphological, and optical properties of CoWO4 nanoparticles. According to the vibrating sample magnetometer result, CoWO4 nanoparticles indicated a paramagnetic behavior at room temperature. In addition, methyl orange was chosen as a dye water pollution to evaluate its degradation by as-synthesize copper tungstate under ultraviolet light irradiation. Furthermore, the photocatalysis results reveal that the maximum decolorization of 70 % for methyl orange occurred with CoWO4 nanoparticles in 70 min under ultraviolet (UV) light irradiation.