| Autor: |
Eliseev, Andrey A., Lukashin, Alexey V., Vertegel, Alexey A., Heifets, Lyudvig I., Zhirov, Alexandr I., Tretyakov, Yury D. |
| Zdroj: |
Materials Research Innovations; June 2000, Vol. 3 Issue: 5 p308-312, 5p |
| Abstrakt: |
AbstractCupric oxide (CuO) nanoparticles have been prepared in amorphous SiO2matrix using a novel variant of sol-gel technique. The method is based on the poly-condensation of a silica source (sodium silicate) in the presence of an aqueous solution containing complex of Cu(II) with polyvinyl alcohol (CuPVA). After gelation, polymeric complexes containing several thousands Cu atoms each are incorporated into the silica network forming a precursor, which is then annealed in oxygen to get rid of organic components. The formation of CuO nano-particles was confirmed by electron diffraction studies. The size of nanoparticles can be controlled by varying [Cu2+]/[PVA] ratio in the precursor. Thus prepared CuO/SiO2nanocomposites are characterized by high specific surface area as measured by capillary adsorption of nitrogen, suggesting their possible use in catalysis. |
| Databáze: |
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