Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion
Chitosan-coated magnetic nanoparticles (CMNP) were prepared in one-step by precipitation in a high-aqueous phase content reverse microemulsion in the presence of chitosan. The high-aqueous phase concentration led to productivities close to 0.49 g CMNP/100 g microemulsion; much higher than those char...
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-07-01
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| Series: | Molecules |
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| Online Access: | http://www.mdpi.com/1420-3049/19/7/9273 |
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| author | María Guadalupe Pineda Silvia Torres Luis Valencia López Francisco Javier Enríquez-Medrano Ramón Díaz de León Salvador Fernández Hened Saade Raúl Guillermo López |
| author_facet | María Guadalupe Pineda Silvia Torres Luis Valencia López Francisco Javier Enríquez-Medrano Ramón Díaz de León Salvador Fernández Hened Saade Raúl Guillermo López |
| author_sort | María Guadalupe Pineda |
| collection | DOAJ |
| description | Chitosan-coated magnetic nanoparticles (CMNP) were prepared in one-step by precipitation in a high-aqueous phase content reverse microemulsion in the presence of chitosan. The high-aqueous phase concentration led to productivities close to 0.49 g CMNP/100 g microemulsion; much higher than those characteristic of precipitation in reverse microemulsions for preparing magnetic nanoparticles. The obtained nanoparticles present a narrow particle size distribution with an average diameter of 4.5 nm; appearing to be formed of a single crystallite; furthermore they present superparamagnetism and high magnetization values; close to 49 emu/g. Characterization of CMNP suggests that chitosan is present as a non-homogeneous very thin layer; which explains the slight reduction in the magnetization value of CMNP in comparison with that of uncoated magnetic nanoparticles. The prepared nanoparticles show high heavy ion removal capability; as demonstrated by their use in the treatment of Pb2+ aqueous solutions; from which lead ions were completely removed within 10 min. |
| first_indexed | 2024-12-19T10:22:35Z |
| format | Article |
| id | doaj.art-38218a97ba9c4a079c8d107fa40014d1 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-19T10:22:35Z |
| publishDate | 2014-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-38218a97ba9c4a079c8d107fa40014d12022-12-21T20:26:00ZengMDPI AGMolecules1420-30492014-07-011979273928710.3390/molecules19079273molecules19079273Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse MicroemulsionMaría Guadalupe Pineda0Silvia Torres1Luis Valencia López2Francisco Javier Enríquez-Medrano3Ramón Díaz de León4Salvador Fernández5Hened Saade6Raúl Guillermo López7Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoDepartamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, C.P. 25294 Saltillo, Coahuila, MexicoChitosan-coated magnetic nanoparticles (CMNP) were prepared in one-step by precipitation in a high-aqueous phase content reverse microemulsion in the presence of chitosan. The high-aqueous phase concentration led to productivities close to 0.49 g CMNP/100 g microemulsion; much higher than those characteristic of precipitation in reverse microemulsions for preparing magnetic nanoparticles. The obtained nanoparticles present a narrow particle size distribution with an average diameter of 4.5 nm; appearing to be formed of a single crystallite; furthermore they present superparamagnetism and high magnetization values; close to 49 emu/g. Characterization of CMNP suggests that chitosan is present as a non-homogeneous very thin layer; which explains the slight reduction in the magnetization value of CMNP in comparison with that of uncoated magnetic nanoparticles. The prepared nanoparticles show high heavy ion removal capability; as demonstrated by their use in the treatment of Pb2+ aqueous solutions; from which lead ions were completely removed within 10 min.http://www.mdpi.com/1420-3049/19/7/9273chitosan magnetic nanoparticles one-stepheavy metal ion removalhigh productivity microemulsion precipitation |
| spellingShingle | María Guadalupe Pineda Silvia Torres Luis Valencia López Francisco Javier Enríquez-Medrano Ramón Díaz de León Salvador Fernández Hened Saade Raúl Guillermo López Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion Molecules chitosan magnetic nanoparticles one-step heavy metal ion removal high productivity microemulsion precipitation |
| title | Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion |
| title_full | Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion |
| title_fullStr | Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion |
| title_full_unstemmed | Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion |
| title_short | Chitosan-Coated Magnetic Nanoparticles Prepared in One-Step by Precipitation in a High-Aqueous Phase Content Reverse Microemulsion |
| title_sort | chitosan coated magnetic nanoparticles prepared in one step by precipitation in a high aqueous phase content reverse microemulsion |
| topic | chitosan magnetic nanoparticles one-step heavy metal ion removal high productivity microemulsion precipitation |
| url | http://www.mdpi.com/1420-3049/19/7/9273 |
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