Kumar, Amit and Naskar, Milan Kanti (2019) Custard apple-shaped NaX zeolite with a large surface area derived from rice husk ash by a single-step template-free process. Journal of Asian Ceramic Societies, 7 (3). pp. 355-360. ISSN 2187-0764

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Custard apple-shaped NaX zeolite with a large surface area was synthesized from rice husk ash without use of a templating agent via a single-step autoclave process at 90 degrees C/6h. The crystallinity of the particles was confirmed by XRD. An FTIR study shows the characteristic bands at 560 cm(-1) for a double 6-membered ring (D6R), while a Raman shift at around 500 cm(-1) indicates the bending mode of 4-membered ring fragments of NaX zeolite. The total BET surface area of the product was found to be 703 m(2)g(-1) comprising a micrpore surface area of 623 m(2)g(-1) and a mesopore surface area of 80 m(2)g(-1). A hierarchical porous structure with micropores in the range of 0.72-1.76nm and mesopores centred at 3.5nm was obtained. FESEM and TEM images of NaX zeolite show a custard apple-like morphology (1-2 mu m) of secondary particles which was formed by self-assembly of nanometer-sized (50-100nm) primary particles. A proposed formation mechanism was illustrated.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 14 Nov 2019 09:36
Last Modified: 14 Nov 2019 09:36
URI: http://cgcri.csircentral.net/id/eprint/4607

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