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Preparation of Nanosilica Powder from Rice Husk Ash by Precipitation Method


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.
Start & End Page 
206 - 211
Received Date 
2007-09-24
Revised Date 
Accepted Date 
2007-10-15
Full Text 
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Keyword 
Nanosilica, Precipitation Method, Rice Husk Ash (RHA), TEM
Volume 
Vol.35 No.1 (JANUARY 2008)
DOI 
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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Vol.36 No.2 (MAY 2009) View: 712 Download:254
New Positive Temperature Coefficient Effect Based on Bi2O3+Fe2O3 or ZrO2+MnO2 Material and Used as Temperature Sensor
page: 109 - 120
Author:Thongchai Panmatarith* [a], Chiraporn Sriprom [a] and Nanthida Sutthirawuth [b]
Vol.32 No.2 (MAY 2005) View: 712 Download:337
Synthesis and Characterisation of Poly(2-hydroxyethyl methacrylate-co-methyl acrylate) Hydrogels for Use as Temporary Skin Substitutes
page: 71 - 82
Author:Tiwaporn Siriwittayakorn [a], Nantarat Suebsanit [a], Robert Molloy [a], Paisit Siriwittayakorn [b] and Malinee Prasitsilp [c]
Vol.28 No.2 (DECEMBER 2001) View: 727 Download:239
Rough Classifier: Experiments on Two Medical Data Sets
page: 59 - 63
Author:Azuraliza A. Bakar, Md N. Sulaiman, Mohamed Othman and Mohd H. Selamat
Vol.28 No.1 (JUNE 2001) View: 697 Download:172
Determination of Number Density and Volume Fraction of Copper Precipitates Within Proeutectoid Cementite in High-Carbon Copper-Containing Steels Using Transmission Electron Microscopy
page: 31 - 38
Author:Torranin Chairuangsri [a], Rik M. D. Brydson [b], David V. Edmonds [b]
Vol.28 No.1 (JUNE 2001) View: 808 Download:252
Solving First Order Systems of Ordinary Differential Equations Using Parallel R-Point Block Method of Variable Step Size and Order
page: 1 - 13
Author:Zurni B. Omar, and Mohamed Suleiman
Vol.37 No.1 (JANUARY 2010) View: 673 Download:225



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