Synthesis of MnWO4 Nano-Particles by Low-Temperature Molten Salt Method
Manganese tungstate nano-particles were successfully synthesized at low temperatures by molten salt method, and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet visible spectra techniques (UV-vis), respectively. The effects of calcining temperatures and salt quantity on the crystallization and development of MnWO4 crystallites were studied. Experimental results showed that the well-crystallized MnWO4 nano-particles with about 40 nm in diameter could be prepared at 270°C with 3:1 mass ratio of the salt to MnWO4 precursor for a holding time of 4 h. XRD analysis evidenced that the product was a pure monoclinic phase of MnWO4 with wolframite structure. UV-vis spectrum revealed that MnWO4 nano-particles had strong light absorption properties in both ultraviolet and visible light region.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Z. W. Song et al., "Synthesis of MnWO4 Nano-Particles by Low-Temperature Molten Salt Method", Advanced Materials Research, Vols. 284-286, pp. 722-725, 2011