Bentonite Clay and Water Glass Porous Monoliths via Sol-gel Process.
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Date
2011
Authors
Adams, L.A.
Shaibu, R.O.
Essien, R.O.
Oki, A.
Journal Title
Journal ISSN
Volume Title
Publisher
SEMANTICSCHOLAR
Abstract
Porous silicate glass monoliths were obtained from two inexpensive precursors; sodium metasilicate
(waterglass) (Na2SiO3) (SMS) and bentonite clay (BTC) using the sol gel synthesis. The optimal gelation
mole ratio for SMS was (Na2SiO3 : H2O : H2SO4 : C2H5OH) of (1 : 13.54 : 0.5 : 1.68); while gelation for
BTC was (BTC : H2O : H2SO4 : C2H5OH) of (1 : 13.54 : 1.0 : 1.68). The gels obtained were initially
washed with deionised water to free the (Si-O-Si) framework from Na2SO4 as by-product of the hydrolysis,
followed by aging, drying at low temperature before finally sintering at 600°C to give the monoliths. The
bulk density of the monoliths obtained were determined, and further characterized using Fourier transform
infra red (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, Atomic absorption spectroscopy
(AAS), and Scanning electron microscopy (SEM). The monoliths show macroporous structure with pore
size ranging from 150 – 250 nm, and can be further tailored to give scaffolds for bone tissue repair.
Description
Keywords
Research Subject Categories::NATURAL SCIENCES::Chemistry::Inorganic chemistry::Bio-inorganic chemistry
Citation
Adams, L. A., Shaibu, R. O., Essien, R. E., & Oki, A. (2011). Bentonite clay and waterglass porous monoliths via the sol-gel process. Journal of Metals, Materials and Minerals, 21(2), 1-6.