Journal
NANOMATERIALS
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano10020304
Keywords
solid-phase extraction; magnetic nanoparticles; graphene oxide; synthesis: material characterization
Categories
Funding
- Plan Propio, Universidad de Malaga
- FEDER funds
- Junta de Andalucia [UMA18-FEDERJA-060]
- Spanish Ministerio de Ciencia y Tecnologia [FPU18/05371]
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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.
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