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Journal of Nanomaterials
Volume 2011, Article ID 858961, 8 pages
Research Article

Preparation and Characterization of Nanozeolite NaA from Rice Husk at Room Temperature without Organic Additives

Department of Environmental Science, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran

Received 21 April 2010; Revised 23 August 2010; Accepted 21 November 2010

Academic Editor: Quanqin Dai

Copyright © 2011 Zahra Ghasemi and Habibollah Younesi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Nanozeolite NaA was synthesized by the hydrothermal method with silica extracted from rice husk as silica source. Amorphous silica with 87.988 wt%   was extracted from rice husk ash by a suitable alkali solution. The effect of the crystallization time and the ratio of on the properties of the final product was investigated. The synthesized nanozeolite was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) techniques, and Brunauer-Emmett-Teller (BET) method. Results revealed that the crystallization time and alkalinity have significant effects on the structural properties of nanozeolite. Nanocrystals NaA with crystal sizes ranging from 50 to 120 nm were synthesized at room temperature with 3 days aging, without adding any organic additives.