Chitosan-Coated Magnetic Nanoparticles with Low Chitosan Content Prepared in One-Step
| Autor: | J. Gerardo Gaona-Lozano, Karla M. Gregorio-Jáuregui, Enrique Díaz Barriga-Castro, Raúl G. López, Yolanda Osuna, Iliana M. de la Garza-Rodríguez, Hened Saade, Anna Ilyna |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Flocculation
Thermogravimetric analysis Materials science Article Subject Coprecipitation Analytical chemistry Nanoparticle Chitosan Magnetization chemistry.chemical_compound chemistry lcsh:Technology (General) lcsh:T1-995 Magnetic nanoparticles General Materials Science Superparamagnetism Nuclear chemistry |
| Zdroj: | Journal of Nanomaterials, Vol 2012 (2012) |
| ISSN: | 1687-4110 |
| DOI: | 10.1155/2012/327562 |
| Popis: | Chitosan-coated magnetic nanoparticles (CMNP) were obtained at 50°C in a one-step method comprising coprecipitation in the presence of low chitosan content. CMNP showed high magnetization and superparamagnetism. They were composed of a core of 9.5 nm in average diameter and a very thin chitosan layer in accordance with electron microscopy measurements. The results from Fourier transform infrared spectrometry demonstrated that CMNP were obtained and those from thermogravimetric analysis allowed to determine that they were composed of 95 wt% of magnetic nanoparticles and 5 wt% of chitosan. 67% efficacy in the Pb+2removal test indicated that only 60% of amino groups on CMNP surface bound to Pb, probably due to some degree of nanoparticle flocculation during the redispersion. The very low weight ratio chitosan to magnetic nanoparticles obtained in this study, 0.053, and the high yield of the precipitation reactions (≈97%) are noticeable. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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