Bohra, Subha and Dey, Kartick Prasad and Kundu, Debtosh and Naskar, Milan Kanti (2013) Synthesis of zeolite T powders by direct dissolution of rice husk ash: an agro-waste material. Journal of Materials Science, 48 (22). pp. 7893-7901. ISSN 0022-2461

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Rice husk ash (RHA), an agro-waste material, was used for the synthesis of zeolite T powders following a simple and cost-effective process. In this process, silica as silicate was directly extracted from solid RHA particles in the presence of aluminate and other aqueous-based precursor materials. The synthesized powders were characterized by thermogravimetry analysis, differential thermal analysis, X-ray diffraction, Fourier transform infrared spectroscopy, N-2 physisorption measurements, and field emission scanning electron microscopy (FESEM). Crystallization of zeolite T powders was noticed at 100 A degrees C/24 h. The vibration bands of the powders at around 580 and 630 cm(-1) indicated the characteristic double six ring of zeolite T. Micropore surface area and micropore volume of zeolite T increased significantly at 100 A degrees C/72 h. FESEM images showed ellipse-shaped morphology of the powders, and their aspect ratio increased with increase in reaction time. A tentative mechanism was proposed for direct extraction of silica as silicate from RHA, and its conversion to zeolite T in the presence of other aqueous-based precursors by a single step process.

Item Type: Article
Subjects: Structural Clay Products
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 05 Feb 2014 11:40
Last Modified: 05 Feb 2014 11:40

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