Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University

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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 700^oC for 3 and 6 h, respectively. Consequently, silica content obtained after heat treatment at 700^oC 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	Download
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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Developing Indicators for Floodplain Wetlands: Managing Water in Agricultural Landscapes
page: 224 - 235
Author:Kim Jenkins, Richard Kingsford, and Darren Ryder
Vol.36 No.2 (MAY 2009) View: 663 Download:239

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: 668 Download:283

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: 686 Download:228

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: 655 Download:160

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: 771 Download:233

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: 638 Download:216

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