Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension
| Autor: | Beatriz Sanz, N. Jovic, Amelia Montone, María Pilar Calatayud, Gerardo F. Goya |
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| Přispěvatelé: | Montone, A. |
| Rok vydání: | 2014 |
| Předmět: |
Expanded graphite
Materials science Iron oxide Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences lcsh:Chemistry Iron oxide nanoparticles symbols.namesake chemistry.chemical_compound nanocomposites Graphite Fourier transform infrared spectroscopy Acrylic acid Nanocomposite Aqueous solution iron oxide nanoparticles General Chemistry 021001 nanoscience & nanotechnology expanded graphite Raman spectroscopy Nanocomposites TEM 0104 chemical sciences Nanocrystal chemistry Chemical engineering lcsh:QD1-999 Iron oxide nanoparticle symbols 0210 nano-technology |
| Zdroj: | Journal of the Serbian Chemical Society Journal of the Serbian Chemical Society, Vol 79, Iss 9, Pp 1155-1167 (2014) |
| Popis: | Hybrid structures composed of exfoliated expanded graphite (EG) and iron oxide nanocrystals have been produced by an ex situ process. The iron oxide nanoparticles coated with meso-2,3-dimercaptosuccinic acid (DMSA), or poly(acrylic) acid (PAA) were integrated onto the exfoliated EG flakes by mixing their aqueous suspensions at room temperature under support of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccin-nimide (NHS). EG flakes have been used both, naked and functionalized with branched polyethylenimine (PEI). Complete integration of two constituents has been achieved and mainteined stable for more than 12 months. No preferential spatial distribution of anchoring sites for attachement of iron oxide nanoparticles has been observed, regardless EG flakes have been used naked or functionalized with PEI molecules. The structural and physico-chemical characteristics of the exfoliated expanded graphite and its hybrids nanostructures has been investigated by SEM, TEM, FTIR and Raman techniques. [Projekat Ministarstva nauke Republike Srbije, br. 45015] |
| Databáze: | OpenAIRE |
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