Abstract
Monodisperse crystalline WO 3·2H 2O (H 2WO 4·H 2O) nanospheres have been prepared by l (+) tartaric acid-assisted microwave hydrothermal (MH) process for the first time. The X-ray powder diffraction (XRD) pattern indicated that the product was in good agreement with the standard JCPDS data for WO 3·2H 2O. The particle sizes and shapes have been measured by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques. The effects of the mass ratios of l (+) tartaric acid to Na 2WO 4·2H 2O on the morphology of WO 3·2H 2O have been investigated. Finally, The formation mechanism for l (+) tartaric acid-assisted MH synthesis of the WO 3·2H 2O nanospheres was also discussed in detail.
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