Sorption of Metal Ions by Poly(ethylene glycol)/β-CD Hydrogels Leads to Gel-Embedded Metal Nanoparticles

Inorganic nanoparticles can be embedded within gels by selectively preloading them with suitable molecular precursors followed by reduction or another suitable reaction. Here, we exploit the selective sorption properties of cross-linked β-cyclodextrin/poly(ethylene glycol) hydrogels, in analogy with...

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Bibliographic Details
Published in:Langmuir 2013-07, Vol.29 (29), p.9173-9178
Main Authors: Ionita, Gabriela, Marinescu, Gabriela, Ilie, Cornelia, Anghel, Dan F, Smith, David K, Chechik, Victor
Format: Article
Language:English
Subjects:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Surface physical chemistry
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Summary:Inorganic nanoparticles can be embedded within gels by selectively preloading them with suitable molecular precursors followed by reduction or another suitable reaction. Here, we exploit the selective sorption properties of cross-linked β-cyclodextrin/poly(ethylene glycol) hydrogels, in analogy with polyurethane foams, to preconcentrate metal salts (HAuCl4 and K2[Co(SCN)4]) and subsequently generate gel-embedded metal nanoparticles (10–50 nm). The nanoparticles are shown to be immobilized within the gel network as a consequence of their large dimensions in comparison to the gel network pore size. We suggest this is a useful approach for the generalized synthesis of hybrid soft–hard nanomaterials.
ISSN:0743-7463
1520-5827
DOI:10.1021/la401541p