Dispersed ZrO2 nanoparticles in MCM-48 with high adsorption activity

Deshpande, Parag A and Polisetti, Sneha and Madeas, Giridhar and Jyothi, Divya and Chandrasekaran, Srinivasan (2012) Dispersed ZrO2 nanoparticles in MCM-48 with high adsorption activity. In: AICHE JOURNAL, 58 (10). pp. 2987-2996.

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Abstract

A new two-step synthesis of ZrO2-MCM nanocomposites using the gel combustion technique was accomplished; the resulting material had a high-surface area and showed very high adsorption activity. The deposition of 25 nm ZrO2 particles over MCM was achieved using gel combustion technique with glycine as a fuel, and the formation of nanocomposites was confirmed using transmission electron microscopy. The composites were also characterized by XRD, SEM, FTIR and N2 adsorption-desorption analysis. The nanocomposites were tested for the adsorption of cationic dyes. High rates of adsorption and large dye uptake were observed over the nanocomposites. The rate of adsorption over the nanocomposites was higher than that observed for physical ZrO2-MCM mixtures and commercial activated carbon. The nanocomposite with 10 wt % ZrO2 showed the highest rate of adsorption owing to the synergistic effects of ZrO2 surface groups, smaller particle size, fine dispersion and high-surface area of the composite. (c) 2012 American Institute of Chemical Engineers AIChE J, 58: 29872996, 2012

Item Type:	Journal Article
Publication:	AICHE JOURNAL
Publisher:	WILEY-BLACKWELL
Additional Information:	Copyright for this article belongs to WILEY-BLACKWELL
Keywords:	nanocomposites; ZrO2-MCM; surface area; adsorption isotherms
Department/Centre:	Division of Chemical Sciences > Organic Chemistry Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	10 Dec 2012 09:02
Last Modified:	10 Dec 2012 09:02
URI:	http://eprints.iisc.ac.in/id/eprint/45225

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