Abstract
Scheelite-type calcium tungstate (CaWO4) nanostructures have been successfully synthesized via the co-precipitation process by using Ca(Sal)2 (Sal = salicylidene) and sodium tungstate dehydrate (Na2WO4·2H2O) as starting materials. The as-synthesized nanostructures were characterized by X-ray diffraction, Fourier transform infrared spectra, energy dispersive X-ray microanalysis, photoluminescence spectroscopy, transmission electron microscopy, and scanning electron microscopy. Influence of parameters such as temperature, solvent and surfactant were investigated to attain the best condition. This research has offered a general, easy, and efficient approach to control the composition and morphology of scheelite-type calcium tungstate nanostructures in aqueous solution. Moreover, adsorption of Rhodamine B dye on calcium tungstate nanostructures was investigated and the uptake% was determined to be >90 % in 240 min.
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