%0 Journal Article
%T Fabrication and Photocatalysis of Rod-like ZnWO4 Nanocrystallites
%A ZHANG Xiao-Wei
%A CAO Li-Yun
%A HUANG Jian-Feng
%A Liu Yi-Jun
%A LI Jia
%J 无机材料学报
%D 2012
%I Science Press
%R 10.3724/sp.j.1077.2012.12024
%X The Wolframite ZnWO4 nanocrystallites were prepared by a facile, template-free microwave hydrothermal method using Na2WO4·2H2O and Zn(COOCH3)2·2H2O as starting materials. The phase, morphology and optical properties of as-prepared samples were characterized by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), UV-Vis absorption spectra (UV-Vis) and photoluminescence spectroscopy (PL). Results indicate that ZnWO4 nanocrystallites have a preferential orientation growth along the (100) planes, and the morphology of ZnWO4 nanocrystallites change into rodlike structure with the increase of microwave hydrothermal time. An intense blue PL emission with a 460 nm wavelength is observed when the as-prepared ZnWO4 nanocrystallites are excited by a 295 nm wavelength, and they show a strong absorption in the ultraviolet region. The ZnWO4 nanocrystallites whose orientation degree of (100) planes is 0.24 with the particle sizes of 50–60 nm show the best photocatalytic properties.
%K <p>microwave hydrothermal method
%K ZnWO4
%K morphology
%K photocatalysis</p>
%U http://www.jim.org.cn/fileup/PDF/20121106.pdf