Вплив допування оксидами міді (ІІ) та нікеля (II) на морфологічні властивості нанокомпозитів кремнезем/диоксид титану
Morphological characteristics of CuO- and NiO-doped silica/titania nanocomposites are analyzed using atomic force microscopy and low-temperature nitrogen adsorption. The different types of pores (nano-, meso- and macropores) in the powder composites are modeled as voids between spherical nanoparticl...
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| Datum: | 2012 |
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| Hauptverfasser: | , , , , , , , |
| Format: | Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2012
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| Online Zugang: | https://www.cpts.com.ua/index.php/cpts/article/view/186 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Zusammenfassung: | Morphological characteristics of CuO- and NiO-doped silica/titania nanocomposites are analyzed using atomic force microscopy and low-temperature nitrogen adsorption. The different types of pores (nano-, meso- and macropores) in the powder composites are modeled as voids between spherical nanoparticles packed in random aggregates. It is shown that specific surface area, total pore volume, average pore radius, incremental pore size distribution and changes in relationships between these characteristics of the composites reveal a non-linear behavior depended on the presence of the dopants. The textural and atomic force microscopy investigations suggest that processes of aggregation differ from each other depending on the type of doping oxide. Fractal dimension, estimated according to Frenkel-Halsey-Hill equation using the adsorption branch, has values about 2.50–2.60 and indicates the aggregate formation. |
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