A STUDY ON THE INFLUENCE OF SOME FACTORS ON THE PRODUCTION OF SIO2 FROM RICE HUSK
Corresponding Author(s) : Le Tu Hai
UED Journal of Social Sciences, Humanities and Education,
Vol. 2 No. 3 (2012): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
The influence of some factors such as NaOH concentration, ratio of rice husk ash (RHA)/NaOH solution, temperature, time of reaction on the production of silica SiO2 from rice husk ash, obtained after the heat treatment of rice husk at 800oC, has been studied. The optimum conditions for preparation of silica from rice husk ash were NaOH 5.0 M; 1 g of RHA/100 ml NaOH 5.0 M; temperature 100oC; time of reaction 4 hours. The morphology, crytal structure, surface area of SiO2 were investigated by IR, SEM, XRD and BET. The infrared spectra data supported the presence of hydrogen bonded silanol group and the siloxane groups in silica. X-ray diffractograms and diffraction pattern showed that the obtained silica was amorphous. The specific surface area was found to be 108.96 m2/g.
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