Thin films of sol-gel derived Pt/alumina were prepared from a boehmite solution containing alumina-sec-butoxide and chloroplatinic acid. At 1100 °C, c-Al 2 O 3 phase was not present in the alumina sample but it remained in the Pt/alumina sample, suggesting that improved thermal stability of the c-Al
Modifications in the microstructure of alumina porous materials by hydrothermal treatment
✍ Scribed by D. Quattrini; D. Serrano; S. Perez Catán
- Book ID
- 106251562
- Publisher
- Springer
- Year
- 2001
- Tongue
- English
- Weight
- 157 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1434-5021
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The effect of the duration of hydrothermal treatment (in the range 1-20 h) on the parameters of the pore structure of silica xerogels was investigated. Silica gels with different initial porous structure parameters were used. The specific surface area (S) of the adsorbents changed from 830 to 38 m 2
Alumina precursors were prepared by hydrothermal treatment of an alkoxide derivedalcogel. By selection of appropriate hydrothermal conditions aluminas with a variety of pore distributions were obtained, and the pore radius can be easily controlled from 5.0 to 23.5 nm. The hydrothermal conditions wer