Synthesis and characterization of a new magnetic material join to graphene oxide as sorbent

Pablo Montoro Leal (), Juan Carlos García Mesa (), María Mar López Guerrero () and Elisa Isabel Vereda Alonso ()
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Pablo Montoro Leal: University of Malaga
Juan Carlos García Mesa: University of Malaga
María Mar López Guerrero: University of Málaga
Elisa Isabel Vereda Alonso: University of Malaga

No 9811007, Proceedings of International Academic Conferences from International Institute of Social and Economic Sciences

Abstract: The synthesis and characterization of new adsorbents is addressed in this work. This material is based on the coupling of magnetic nanoparticles and graphene oxide (MNPs@GO). Graphene oxide (GO) presents a high surface area to volume ratio, and high rate of diffusion in water. However it is tedious and difficult to separate GO from the aqueous solution. The coupling with magnetic nanoparticles provides an easy magnetic separation. Thus, MNPs@GO has demonstrated to be an excellent adsorbent material towards to organic compounds but not to ionic metals. For this reason, a chelating group is attached to the material surface: [1,5-bis(2-pyridyl)-3-methylene] thiocarbonohydrazide (DPTH) in order to increase the selectivity for metal ions. To establish which is the best route of synthesis, two different strategies were designed (method 1 and method 2). The two new materials obtained, called DPTH(1) and DPTH(2), were characterized and their properties as extractants were studied. Several analytical techniques were used to characterize them; TEM, XPS, CNHS elemental analysis and FT IR. To conclude, the DPTH(2) showed better properties as extractant, even at trace levels.

Keywords: Solid-phase extraction; magnetic nanoparticles; graphene oxide; chelating functional groups; TEM; XPS; IR (search for similar items in EconPapers)
JEL-codes: L65 Q53 Q56 (search for similar items in EconPapers)
Pages: 8 pages
Date: 2019-10
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Published in Proceedings of the Proceedings of the 49th International Academic Conference, Dubrovnik, Oct 2019, pages 130-137

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