Beta-Cyclodextrin capped graphene-magnetite nanocomposite for selective adsorption of Bisphenol-A.

Ragavan, K. V. and Rastogi, N. K. (2017) Beta-Cyclodextrin capped graphene-magnetite nanocomposite for selective adsorption of Bisphenol-A. Carbohydrate Polymers, 168. pp. 129-137.

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Abstract

Beta-cyclodextrin capped Graphene-magnetite (G-Fe3O4-BCD) nanocomposite was synthesized byethylenediamine conjugation and used as an adsorbent for selective removal of Bisphenol-A (BPA) inwater. Characterization of nanocomposite revealed BCD conjugated to Fe3O4nanoparticles (30–40 nm)embedded on graphene. Adsorption process followed Langmuir model and pseudo second order kinet-ics with an adsorption capacity of 59.6 mg/g. It was found to be highly favourable physisorption andendothermic process as indicated by �G◦(−3.36 kJ/mol) and �H◦(2.08 kJ/mol) values at ambient tem-peratures. The nanocomposite was highly specific towards BPA compared to its analogs, largely drivenby host-guest interaction between BCD and BPA. Nanocomposite had a high magnetization of 97 emu/gwith superparamagnetic property at room temperature which helps in faster separation using an externalmagnetic field. Nanocomposite can be regenerated with methanol and can be reused without much lossin adsorption efficiency (<10%) after 6 cycles. It has huge potential and application in selective adsorptionof target molecules.

Item Type:	Article
Uncontrolled Keywords:	�beta-Cyclodextrin Bisphenol-A Specific adsorption Host-guest interaction Graphene nanocomposite Nano-adsorbent
Subjects:	600 Technology > 01 Medical sciences > 17 Toxicology
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	10 Jul 2017 08:27
Last Modified:	10 Jul 2017 08:27
URI:	http://ir.cftri.res.in/id/eprint/12775

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