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Comparative Study of Synthesis Methods to Prepare New Functionalized Adsorbent Materials Based on MNPs–GO Coupling

Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, 29071 Málaga, Spain
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Nanomaterials 2020, 10(2), 304; https://doi.org/10.3390/nano10020304
Received: 3 January 2020 / Revised: 6 February 2020 / Accepted: 7 February 2020 / Published: 11 February 2020
(This article belongs to the Special Issue Nanocarbon Based Materials)
In this work, the synthesis of new adsorbent nanomaterials based on the coupling of magnetic nanoparticles and graphene oxide (MNPs–GO) was addressed. Separately, MNPs and GO have adsorbent properties of great interest, but their use involves certain difficulties. The coupling seeks compensation for their disadvantages, while maintaining their excellent properties. Three different routes to synthesize coupled MNPs–GO were studied and are compared in this work. The three synthesized materials were functionalized with chelating groups: [1,5-bis (di-2-pyridyl) methylene] thiocarbonohydrazide (DPTH) and [1,5-bis(2-pyridyl)3-sulfophenylmethylene] thiocarbonohydrazide (PSTH). The new adsorbent nanomaterials were characterized adequately. Moreover, their capacities of adsorption toward heavy and noble metals were determined, in order to apply them as extractants in magnetic solid-phase extraction to preconcentrate metals in environmental samples. The results showed that one of the routes provided nanomaterials with better adsorbent characteristics and higher yields of functionalization.
Keywords: solid-phase extraction; magnetic nanoparticles; graphene oxide; synthesis: material characterization solid-phase extraction; magnetic nanoparticles; graphene oxide; synthesis: material characterization
MDPI and ACS Style

Montoro-Leal, P.; García-Mesa, J.C.; López Guerrero, M.M.; Vereda Alonso, E. Comparative Study of Synthesis Methods to Prepare New Functionalized Adsorbent Materials Based on MNPs–GO Coupling. Nanomaterials 2020, 10, 304.

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