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Novel N-(2-((4-vinylbenzyl)thio)ethyl)Acetamide Functionalized Magnetite Nanoparticle: Synthesis and Test Selective Silver(I) Removal Study

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Magnetic nanoparticles embody a valuable suite of technologies for the selective recovery of metals from the aqueous phase owing to their high surface area, the ease of recovery using an externally applied magnetic field and their ability to be custom designed. Ligands bearing sulfur (S-) and nitrogen (N-) donors are suited for such functionalization due to their proven selectivity’s for Ag(I) binding. Herein, we report the synthesis of a novel ligand—N-(2-((4-vinylbenzyl)thio)ethyl)acetamide in two steps and with a 76% yield. Also, the attachment of the ligand to the surface of magnetite nanoparticle with the aid of azobisisobutyronitrile (AIBN) was achieved under mild conditions. The ligand-magnetite nanosorbent demonstrated excellent removal efficiency (99.9%) and outstanding selectivity for Ag(I) recovery under the prevailing experimental conditions. Taking together, the results indicate that N-(2-((4-vinylbenzyl)thio)ethyl)acetamide on magnetite nanoparticles is an efficient sorbent for the selective recovery of Ag(I) from the aqueous phase.

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  1. Synthetic procedure to Fe3O4@BMTP@VTEA: A mixture of the Fe3O4@BMTP (40 mg), VTEA (160 mg, 0.68 mmol) and AIBN (8 mg, 0.05 mmol) in 4 mL toluene inside a 20 mL glass vial were sonicated at room temperature for 30 min and subsequently degassed for another 30 min. AIBN (24 mg, 0.146 mmol) was dissolved in toluene (3 mL) and degassed for 30 min. The AIBN solution was then added dropwise to the stirred mixture of the Fe3O4@BMTP and VTEA and warmed at 60 °C for 15 h. Subsequently, the resulting brown solid was magnetically separated and the supernatant decanted. Finally, the solids were washed with THF, magnetically separated and dried under reduced pressure of approximately 10 mbar and 40 °C to give Fe3O4@BMTP@VTEA.


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The author would like to thank The UK Commonwealth Scholarship Commission for funding the research under Grant Number NGCS-2015-448.

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ADA: Experimental design, investigation, data curation and manuscript writing, AJC: Experimental design, supervision.

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Correspondence to Abiodun D. Aderibigbe.

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Aderibigbe, A.D., Clark, A.J. Novel N-(2-((4-vinylbenzyl)thio)ethyl)Acetamide Functionalized Magnetite Nanoparticle: Synthesis and Test Selective Silver(I) Removal Study. J Inorg Organomet Polym 30, 4803–4808 (2020).

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