Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine
A new approach using X-ray photoelectron spectroscopy (XPS) was employed to give insight into the reduction of graphene oxide (GO) using a green approach with polydopamine (PDA). In this approach, the number of carbon atoms bonded to OH and to nitrogen in PDA is considered and compared to the total...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/6/902 |
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| author | Cláudia Silva Frank Simon Peter Friedel Petra Pötschke Cordelia Zimmerer |
| author_facet | Cláudia Silva Frank Simon Peter Friedel Petra Pötschke Cordelia Zimmerer |
| author_sort | Cláudia Silva |
| collection | DOAJ |
| description | A new approach using X-ray photoelectron spectroscopy (XPS) was employed to give insight into the reduction of graphene oxide (GO) using a green approach with polydopamine (PDA). In this approach, the number of carbon atoms bonded to OH and to nitrogen in PDA is considered and compared to the total intensity of the signal resulting from OH groups in polydopamine-reduced graphene oxide (PDA-GO) to show the reduction. For this purpose, GO and PDA-GO with different times of reduction were prepared and characterized by Raman Spectroscopy and XPS. The PDA layer was removed to prepare reduced graphene oxide (RGO) and the effect of all chemical treatments on the thermal and electrical properties of the materials was studied. The results show that the complete reduction of the OH groups in GO occurred after 180 min of reaction. It was also concluded that Raman spectroscopy is not well suited to determine if the reduction and restoration of the sp<sup>2</sup> structure occurred. Moreover, a significant change in the thermal stability was not observed with the chemical treatments. Finally, the electrical powder conductivity decreased after reduction with PDA, increasing again after its removal. |
| first_indexed | 2024-12-12T22:31:19Z |
| format | Article |
| id | doaj.art-1963802e013346ffb8098682eace6005 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-12T22:31:19Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-1963802e013346ffb8098682eace60052022-12-22T00:09:36ZengMDPI AGNanomaterials2079-49912019-06-019690210.3390/nano9060902nano9060902Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with PolydopamineCláudia Silva0Frank Simon1Peter Friedel2Petra Pötschke3Cordelia Zimmerer4Leibniz Institute of Polymer Research Dresden (IPF), 01069 Dresden, GermanyLeibniz Institute of Polymer Research Dresden (IPF), 01069 Dresden, GermanyLeibniz Institute of Polymer Research Dresden (IPF), 01069 Dresden, GermanyLeibniz Institute of Polymer Research Dresden (IPF), 01069 Dresden, GermanyLeibniz Institute of Polymer Research Dresden (IPF), 01069 Dresden, GermanyA new approach using X-ray photoelectron spectroscopy (XPS) was employed to give insight into the reduction of graphene oxide (GO) using a green approach with polydopamine (PDA). In this approach, the number of carbon atoms bonded to OH and to nitrogen in PDA is considered and compared to the total intensity of the signal resulting from OH groups in polydopamine-reduced graphene oxide (PDA-GO) to show the reduction. For this purpose, GO and PDA-GO with different times of reduction were prepared and characterized by Raman Spectroscopy and XPS. The PDA layer was removed to prepare reduced graphene oxide (RGO) and the effect of all chemical treatments on the thermal and electrical properties of the materials was studied. The results show that the complete reduction of the OH groups in GO occurred after 180 min of reaction. It was also concluded that Raman spectroscopy is not well suited to determine if the reduction and restoration of the sp<sup>2</sup> structure occurred. Moreover, a significant change in the thermal stability was not observed with the chemical treatments. Finally, the electrical powder conductivity decreased after reduction with PDA, increasing again after its removal.https://www.mdpi.com/2079-4991/9/6/902graphene oxidereduced graphene oxideX-ray photoelectron spectroscopyRaman spectroscopyelectrical conductivityfunctionalization |
| spellingShingle | Cláudia Silva Frank Simon Peter Friedel Petra Pötschke Cordelia Zimmerer Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine Nanomaterials graphene oxide reduced graphene oxide X-ray photoelectron spectroscopy Raman spectroscopy electrical conductivity functionalization |
| title | Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine |
| title_full | Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine |
| title_fullStr | Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine |
| title_full_unstemmed | Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine |
| title_short | Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine |
| title_sort | elucidating the chemistry behind the reduction of graphene oxide using a green approach with polydopamine |
| topic | graphene oxide reduced graphene oxide X-ray photoelectron spectroscopy Raman spectroscopy electrical conductivity functionalization |
| url | https://www.mdpi.com/2079-4991/9/6/902 |
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