Microemulsion-mediated solvothermal synthesis and photoluminescent property of 3D flowerlike MnWO_4 microanocomposite structure

摘要

Novel three-dimensional (3D) flowerlike MnWO_4 microanocomposite structure has been successfully synthesized for the irst time. The synthesized products were systematically studied by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) and photoluminescence (PL) spectra. It is found that both reaction time and temperature have significant effects on the morphology of the products. It was proposed that the primary nanoparticles formed in microemulsions aggregated into nanosheets through the Ostwald ripening process, and then the assembly of the nanosheets led to the development of the 3D flowerlike MnWO_4 microanocomposite structures. Such a microemulsion-based solvothermal approach may be extended to fabricate complex 3D architectures of other materials. In addition, the photoluminescent property of the obtained MnWO_4 crystals has also been investigated.