Tin(IV) oxide nanoparticles were prepared by wet colloidchemical synthesis method on the surface of layered montmorillonite support. The prepared nanocomposites were investigated by several independent measurement methods. The X-ray diffraction, the Mössbauer spectroscopy and the positron lifetime spectroscopy examinations squarely demonstrated the intercalation of the nanosized SnO2 particles into the montmorillonite. It was also established that the size of the nanoparticles can be controlled well by the principles of Weimarn's law. N2 gas adsorption experiments evinced that the incorporation of the SnO2 nanoparticles causes a significant increase in the specific surface area and the porosity of montmorillonite. During the thermoanalytical measurements the heat and weight changes of the samples were followed. By these results the optimal calcination temperature of the nanocomposites (400 °C) was obtained. We also observed that the presence of the tin oxide nanoparticles has a strong effect on the form of the TG and the DTA curves.
|Number of pages||12|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - Mar 1 2002|
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