Abstract
Three-dimensional ordered thin films based on 12-phosphotungstic acid (PW 12O 40/SiO 2) and lanthanide-substituted phosphotungstate (Eu(PW 11O 39) 2/SiO 2, Gd(PW 11O 39) 2/SiO 2 and Eu(P 2W 17O 61) 2/SiO 2) were constructed by an inverse opal method, using polystyrene colloidal crystal as a template. The samples were characterized by elemental analysis, XRD, IR spectra, UV–vis diffuse reflectance spectra (DR-UV–Vis) and SEM techniques. These thin films show well-defined lamellar array with inverse opal structure, and lanthanide polyoxometalate thin films exhibit photoluminescent properties.
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