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Frontiers of Chemical Science and Engineering >> 2019, Volume 13, Issue 3 doi: 10.1007/s11705-018-1784-x

Cube-octameric silsesquioxane (POSS)-capped magnetic iron oxide nanoparticles for the efficient removal of methylene blue

. Faculty of Engineering, Department of Polymer Science and Engineering, University of Bonab, Bonab, Iran.. Research Laboratory of Polymer, Department of Organic and Biochemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.. Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran.. Department of Horticulture, Faculty of Agriculture, University of Maragheh, Maragheh, Iran.. Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA

Accepted: 2019-04-24 Available online: 2019-04-24

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Abstract

Octavinyl polyhedral oligomeric silsesquioxane (POSS) was polymerized on the surface of Fe O nanoparticles (NPs) and then the NPs were functionalized with carboxylic acid groups using thiol-ene click reactions with thioglycolic acid. The as-prepared Fe O @POSS-COOH magnetic hybrid NPs had mesoporous structures with an average particle diameter of 15 nm and a relatively high specific surface area of 447 m ∙g . Experimental results showed that 4 mg of Fe O @POSS-COOH NPs efficiently adsorbed and removed methylene blue from water at 5 min. This is due to the presence of both carboxylic acid and pendant vinyl groups on the Fe O @POSS-COOH NPs. These NPs could be easily withdrawn from water within a few seconds under moderate magnetic field and showed high stability in acid and alkaline aqueous mediums.

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