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Research Articles

Synthesis of Nanosilica from Paddy Husk Ash and Their Surface Functionalization

Authors:

W.A.P.J. Premaratne ,

University of Kelaniya, LK
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W.M.G.I. Priyadarshana,

Sri Lanka Institute of Nanotechnology (SLINTEC), LK
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S.H.P. Gunawardena,

University of Moratuwa, LK
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A.A.P. De Alwis

Sri Lanka Institute of Nanotechnology (SLINTEC), LK
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Abstract

Nanosilica was synthesized by a chemical precipitation process from paddy husk ash (PHA) efficiently and effectively. Surface functionalization of the silica nanoparticles was carried out with oleic acid (C18H34O2). Scanning electron micrographs (SEM) data showed that the nanosilica particle size was in the range of 50-70 nm and they were in the agglomerate form. X-ray diffraction (XRD) analysis data revealed that synthesized nanosilica was in amorphous form showing a strong broad peak at 22.14° (2q). Fourier transform infrared spectroscopy (FT-IR) data supported the presence of hydrogen bonded silanol group and siloxane groups in nanosilica. Surface functionalized nanosilica with oleic acid was characterized using thermogravimetric analysis (TGA) and FT-IR methods. FT-IR experimental data showed that the modified nanosilica formed the ester bonding between silanol group in nanosilica and the carboxylic group of oleic acid with a successful functionalization.

DOI: http://dx.doi.org/10.4038/josuk.v8i0.7238

J. Sci. Univ. Kelaniya 8 (2013): 33-48

 

DOI: http://doi.org/10.4038/josuk.v8i0.7238
How to Cite: Premaratne, W.A.P.J. et al., (2014). Synthesis of Nanosilica from Paddy Husk Ash and Their Surface Functionalization. Journal of Science of the University of Kelaniya Sri Lanka. 8, pp.33–48. DOI: http://doi.org/10.4038/josuk.v8i0.7238
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Published on 30 Jul 2014.
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