TiO2-based nanopowders obtained from different Ti-alkoxides
Pure TiO2 and S-doped TiO2 sol-gel nanopowders were prepared by controlled hydrolysis-condensation of titanium alkoxides. The influence of different Ti-alkoxides (tetraethyl-, tetraisopropyl- and tetrabutyl-orthotitanate) used in obtaining TiO2 porous materials in similar conditions (water/alkoxide...
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| Veröffentlicht in: | Journal of thermal analysis and calorimetry 2007-04, Vol.88 (1), p.171-176 |
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| container_title | Journal of thermal analysis and calorimetry |
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| creator | CRISAN, M BRAILEANU, Ana RAILEANU, M CRISAN, D TEODORESCU, V. S BIRJEGA, R MARINESCU, V. E MADARASZ, J POKOL, G |
| description | Pure TiO2 and S-doped TiO2 sol-gel nanopowders were prepared by controlled hydrolysis-condensation of titanium alkoxides. The influence of different Ti-alkoxides (tetraethyl-, tetraisopropyl- and tetrabutyl-orthotitanate) used in obtaining TiO2 porous materials in similar conditions (water/alkoxide ratio, solvent/alkoxide ratio, pH and temperature of reaction) has been investigated. The relationship between the synthesis conditions and the properties of titania nanosized powders, such as thermal stability, phase composition, crystallinity, morphology and size of particles, BET surface area and the influence of dopant was investigated. The nature of the alkyl group strongly influences the main characteristics of the obtained oxide powders, fact which is pointed out by thermal analysis, X-ray diffraction, TEM and BET surface area measurements. |
| doi_str_mv | 10.1007/s10973-006-8125-x |
| format | Article |
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| subjects | Chemistry Colloidal state and disperse state Exact sciences and technology General and physical chemistry General, apparatus, technics of preparation |
| title | TiO2-based nanopowders obtained from different Ti-alkoxides |
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