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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Synthesis and characterization of high surface area nanosilica from rice husk ash by surfactant-free sol-gel method
Journal of Sol-Gel Science and Technology, Volume 69, No. 3, Year 2014
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Description
A nanosilica powder was obtained by thermal treatment of rice husk ash using the sol-gel method without adding any extra surfactant, and was characterized by several techniques. Fourier transform infrared measurements revealed the similarity of the absorption curves of both standard nanosilica and synthesized nanosilica. From the nitrogen adsorption-desorption analysis followed that the nanosilica showed very high surface area of 653 m 2/g, total pore volume of 0.64647 mL/g, and narrow pore radius of about 1.98 nm. Scanning electron microscopy of the nanosilica sample dried at 120°C showed separated particles, while the particles of the sample sintered at 700°C were aggregated. The analysis of transmission electron microscopy (TEM) micrographs and showed that about 69 % of particles had their sizes in the range of 20-25 nm. X-ray diffraction measurements showed the amorphous nature of the synthesized silica. Applying the Debye-Scherrer formula provided the value of the mean crystallite size around 26 nm which agreed with the one determined from TEM. The purity of the prepared nanosilica was higher than 95 % silica which was confirmed by means of energy dispersive X-ray analysis. © 2013 Springer Science+Business Media New York.
Authors & Co-Authors
Hassan, Asaad F.
Egypt, Damanhour
Faculty of Science
Abdelghany, A. M.
Egypt, Giza
National Research Centre
Elhadidy, Hassan
Czech Republic, Brno
Ústavu Fyziky Materiálů Akademie Věd České Republiky
Egypt, Mansoura
Faculty of Science
Youssef́, Ahmed M.K.
Egypt, Mansoura
Faculty of Science
Statistics
Citations: 82
Authors: 4
Affiliations: 4
Identifiers
Doi:
10.1007/s10971-013-3245-9
ISSN:
09280707