Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds
Stable, reproducible and low-cost graphene oxide (GO)/Nafion (N) membranes were fabricated using electronically conductive carbon paper (CP) matts as a scaffold. The presence of polar groups in the Nafion molecule facilitates the strong interaction with functional groups in the GO, which increases G...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/4/556 |
| _version_ | 1818479351078846464 |
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| author | Maria O. Concha-Guzmán Oscar A. Jaramillo-Quintero Marina E. Rincón |
| author_facet | Maria O. Concha-Guzmán Oscar A. Jaramillo-Quintero Marina E. Rincón |
| author_sort | Maria O. Concha-Guzmán |
| collection | DOAJ |
| description | Stable, reproducible and low-cost graphene oxide (GO)/Nafion (N) membranes were fabricated using electronically conductive carbon paper (CP) matts as a scaffold. The presence of polar groups in the Nafion molecule facilitates the strong interaction with functional groups in the GO, which increases GO dispersion and aids the retention of the composite into the CP scaffold. Distribution of GO/N was carefully characterized by X-ray diffraction work function measurements, Raman and scanning electron microscopy analyses. The performance of these membranes was tested with 1 M NaCl at standard conditions, finding 85% ion removal in the best membranes by a mixed ion rejection/retention mechanism. The Nafion provided mechanical stability and fixed negative charge to the membranes, and its micellar organization, segregation and confinement favored ion rejection in Nafion-rich areas. The good electronic conductivity of these membranes was also demonstrated, allowing for the application of a small potential bias to enhance membrane performance in future studies. |
| first_indexed | 2024-12-10T11:09:27Z |
| format | Article |
| id | doaj.art-2ce2ada72e314ff3b2beae9280e82586 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-10T11:09:27Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2ce2ada72e314ff3b2beae9280e825862022-12-22T01:51:27ZengMDPI AGNanomaterials2079-49912019-04-019455610.3390/nano9040556nano9040556Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive ScaffoldsMaria O. Concha-Guzmán0Oscar A. Jaramillo-Quintero1Marina E. Rincón2Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Av. Xochicalco S/N, Col. Centro, Temixco 62580, MexicoCatedrático CONACYT-Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Av. Xochicalco S/N, Col. Centro, Temixco 62580, MexicoInstituto de Energías Renovables, Universidad Nacional Autónoma de México, Av. Xochicalco S/N, Col. Centro, Temixco 62580, MexicoStable, reproducible and low-cost graphene oxide (GO)/Nafion (N) membranes were fabricated using electronically conductive carbon paper (CP) matts as a scaffold. The presence of polar groups in the Nafion molecule facilitates the strong interaction with functional groups in the GO, which increases GO dispersion and aids the retention of the composite into the CP scaffold. Distribution of GO/N was carefully characterized by X-ray diffraction work function measurements, Raman and scanning electron microscopy analyses. The performance of these membranes was tested with 1 M NaCl at standard conditions, finding 85% ion removal in the best membranes by a mixed ion rejection/retention mechanism. The Nafion provided mechanical stability and fixed negative charge to the membranes, and its micellar organization, segregation and confinement favored ion rejection in Nafion-rich areas. The good electronic conductivity of these membranes was also demonstrated, allowing for the application of a small potential bias to enhance membrane performance in future studies.https://www.mdpi.com/2079-4991/9/4/556graphene oxidemembranesNafion |
| spellingShingle | Maria O. Concha-Guzmán Oscar A. Jaramillo-Quintero Marina E. Rincón Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds Nanomaterials graphene oxide membranes Nafion |
| title | Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds |
| title_full | Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds |
| title_fullStr | Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds |
| title_full_unstemmed | Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds |
| title_short | Modification of Graphene Oxide Membranes by the Incorporation of Nafion Macromolecules and Conductive Scaffolds |
| title_sort | modification of graphene oxide membranes by the incorporation of nafion macromolecules and conductive scaffolds |
| topic | graphene oxide membranes Nafion |
| url | https://www.mdpi.com/2079-4991/9/4/556 |
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