Abstract :
We determined the synthesis conditions for successive ionic layer deposition of the Sn16(OH)xPW19Oy nH2O nanolayers on
silica surfaces. The synthesized layers were characterized using UV-Vis and FTIR absorption spectroscopies, X-ray photoelectron
spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy
(AFM). On heating the as-synthesized layers to 200–500 8C in air, incorporated water evaporate, while M–OH groups are
condensed and concentration of the W–O–W and W–O–Sn bonds increase. The layers have amorphous agglomerate-like
structure. The agglomerate size is from 20 to 100 nm. Upon heating to 600 8C, the size insignificantly increases, the agglomerate
form being practically unchanged. The data obtained allow conclusion that the layers present a hybrid compound consisting of
fragments of isopoly-(SnxOyHz) and heteropoly-(HxPWyOz) compounds.
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