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Nano-fibriform production of silica from natural chrysotile
- Source :
-
Journal of Colloid & Interface Science . Mar2006, Vol. 295 Issue 2, p436-439. 4p. - Publication Year :
- 2006
-
Abstract
- Abstract: Nano-fibriform silica was extracted from chrysotile by the acid-leaching method. The acid-leached residue of chrysotile has been studied by TEM, XRD, FT-IR, and thermal analysis techniques, etc. When the magnesium leaching degree (MLD) is over 90%, the nano-fibriform silica consists of hydrous silicon dioxide (above 90%) with small amount of magnesium trapped inside the Si. The amount of hydroxyl on surface of nano-fibriform silica is 6 unit nm−2. This value is between the values of fumed and precipitated silica. This study shows that nano-fibriform silica is a kind of amorphous matter with a high special surface area (368 m2/g), a high adsorption (330 cm3/g), and a larger pore volume (0.51 cm3/g). The diameter of a single silica fiber is 20–30 nm. The nitrogen adsorption isotherm is similar to Type IV curve. The nano-fibriform silica is one of mesopores materials. [Copyright &y& Elsevier]
- Subjects :
- *SILICA
*CHRYSOTILE
*LEACHING
*MAGNESIUM
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 295
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 19766703
- Full Text :
- https://doi.org/10.1016/j.jcis.2005.08.055