PVDF membranes containing hybrid nanoparticles for adsorbing cationic dyes: physical insights and mechanism

Sharma, Maya and Madras, Giridhar and Bose, Suryasarathi (2016) PVDF membranes containing hybrid nanoparticles for adsorbing cationic dyes: physical insights and mechanism. In: MATERIALS RESEARCH EXPRESS, 3 (7).

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Abstract

In this study, Fe (iron) and Ag (silver) based adsorbents were synthesized using solution combustion and in situ reduction techniques. The synthesized adsorbents were comprehensively characterized by different techniques including electron microscopy, BET, XRD, Zeta potential etc. Three chlorinated cationic dyes used were malachite green, methyl violet and pyronin Y. These dyes were adsorbed on various synthesized adsorbents iron III oxide (Fe2O3)], iron III oxide decorated silver nanoparticles by combustion synthesis technique Fe2O3-Ag(C)] and iron III oxide decorated silver nanoparticles using in situ reduction, Fe2O3-Ag (S)]. The isotherm and the adsorption kinetics have been studied systematically. The kinetic data can be explained by the pseudo second order model and the adsorption equilibrium followed Langmuir isotherm. The equilibrium and kinetics results suggest that Fe2O3-Ag(S) nanoparticles showed the maximum adsorption among all the adsorbents. Hence, Polyvinylidene fluoride based membranes containing Fe2O3-Ag(S) nanoparticles were prepared via phase inversion (precipitation immersion usingDMF/water) technique. The adsorption kinetics were studied in detail and it was observed that the composite membrane showed synergistic improvement in dye adsorption. Such membranes can be used for water purification.

Item Type:	Journal Article
Publication:	MATERIALS RESEARCH EXPRESS
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	22 Oct 2016 07:32
Last Modified:	22 Oct 2016 07:32
URI:	http://eprints.iisc.ac.in/id/eprint/54951

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