e-Journal
Paper Type ![]() |
Contributed Paper |
Title ![]() |
Preparation of Nanosilica Powder from Rice Husk Ash by Precipitation Method |
Author ![]() |
Nittaya Thuadaij and Apinon Nuntiya |
Email ![]() |
anuntiya@chiangmai.ac.th |
Abstract: This work presented a laboratory studies on the preparation of rice husk ash by burning at 700oC for 3 and 6 h, respectively. Consequently, silica content obtained after heat treatment at 700oC for 6 h was 98.14%. Rice husk ash (RHA) was purified by alkaline extraction method used 2.0, 2.5 and 3.0 N sodium hydroxide. Percent yield of silica extracted by 2.5 N. NaOH, was 90.3% and the infrared spectral data supported the presence of hydrogen bonded silinol group and the siloxane groups in silica. Subsequently, the RHAwas subjected to precipitation method in order to produce nanosilica. The precipitation was done by refluxing silica from RHA in boiling 2.0, 2.5 and 3.0 N NaOH, respectively. TEM results showed that 2.5 N NaOH for 10 h provided agglomerate particles with dimension of 5-10. The specificsurface area was found to be 656 m2/g. From X-ray diffractograms and diffraction pattern showed that the obtained products were amorphous nanosilica.
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Start & End Page ![]() |
206 - 211 |
Received Date ![]() |
2007-09-24 |
Revised Date ![]() |
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Accepted Date ![]() |
2007-10-15 |
Full Text ![]() |
Download |
Keyword ![]() |
Nanosilica, Precipitation Method, Rice Husk Ash (RHA), TEM |
Volume ![]() |
Vol.35 No.1 (JANUARY 2008) |
DOI |
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Citation |
Thuadaij N. and Nuntiya A., Preparation of Nanosilica Powder from Rice Husk Ash by Precipitation Method, Chiang Mai Journal of Science, 2008; 35(1): 206-211. |
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