Transient chemical and structural changes in graphene oxide during ripening
Abstract Graphene oxide (GO)—the oxidized form of graphene—is actively studied in various fields, such as energy, electronic devices, separation of water, materials engineering, and medical technologies, owing to its fascinating physicochemical properties. One major drawback of GO is its instability...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-02-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-46083-4 |
| _version_ | 1797274071187062784 |
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| author | Hayato Otsuka Koki Urita Nobutaka Honma Takashi Kimuro Yasushi Amako Radovan Kukobat Teresa J. Bandosz Junzo Ukai Isamu Moriguchi Katsumi Kaneko |
| author_facet | Hayato Otsuka Koki Urita Nobutaka Honma Takashi Kimuro Yasushi Amako Radovan Kukobat Teresa J. Bandosz Junzo Ukai Isamu Moriguchi Katsumi Kaneko |
| author_sort | Hayato Otsuka |
| collection | DOAJ |
| description | Abstract Graphene oxide (GO)—the oxidized form of graphene—is actively studied in various fields, such as energy, electronic devices, separation of water, materials engineering, and medical technologies, owing to its fascinating physicochemical properties. One major drawback of GO is its instability, which leads to the difficulties in product management. A physicochemical understanding of the ever-changing nature of GO can remove the barrier for its growing applications. Here, we evidencde the presence of intrinsic, metastable and transient GO states upon ripening. The three GO states are identified using a $$\pi -{\pi }^{*}$$ π − π * transition peak of ultraviolet–visible absorption spectra and exhibit inherent magnetic and electrical properties. The presence of three states of GO is supported by the compositional changes of oxygen functional groups detected via X-ray photoelectron spectroscopy and structural information from X-ray diffraction analysis and transmission electron microscopy. Although intrinsic GO having a $$\pi -{\pi }^{*}$$ π − π * transition at 230.5 ± 0.5 nm is stable only for 5 days at 298 K, the intrinsic state can be stabilized by either storing GO dispersions below 255 K or by adding ammonium peroxydisulfate. |
| first_indexed | 2024-03-07T14:53:08Z |
| format | Article |
| id | doaj.art-045e14c7031241948f5b847c68182ec2 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-07T14:53:08Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-045e14c7031241948f5b847c68182ec22024-03-05T19:33:42ZengNature PortfolioNature Communications2041-17232024-02-0115111010.1038/s41467-024-46083-4Transient chemical and structural changes in graphene oxide during ripeningHayato Otsuka0Koki Urita1Nobutaka Honma2Takashi Kimuro3Yasushi Amako4Radovan Kukobat5Teresa J. Bandosz6Junzo Ukai7Isamu Moriguchi8Katsumi Kaneko9Research Initiative for Supra-Materials, Shinshu UniversityGraduate School of Engineering, Nagasaki UniversityNew Material & Value Creation Gr., Project Material Creation Dept., Mobility Material Engineering Div., Toyota Motor CorporationDevelopment Gr.2, Development Section, Engineering Dept., Sanwayuka Industry CorporationDepartment of Physics, Faculty of Science, Shinshu UniversityResearch Initiative for Supra-Materials, Shinshu UniversityDepartment of Chemistry and Biochemistry, The City College of New YorkNew Material & Value Creation Gr., Project Material Creation Dept., Mobility Material Engineering Div., Toyota Motor CorporationGraduate School of Engineering, Nagasaki UniversityResearch Initiative for Supra-Materials, Shinshu UniversityAbstract Graphene oxide (GO)—the oxidized form of graphene—is actively studied in various fields, such as energy, electronic devices, separation of water, materials engineering, and medical technologies, owing to its fascinating physicochemical properties. One major drawback of GO is its instability, which leads to the difficulties in product management. A physicochemical understanding of the ever-changing nature of GO can remove the barrier for its growing applications. Here, we evidencde the presence of intrinsic, metastable and transient GO states upon ripening. The three GO states are identified using a $$\pi -{\pi }^{*}$$ π − π * transition peak of ultraviolet–visible absorption spectra and exhibit inherent magnetic and electrical properties. The presence of three states of GO is supported by the compositional changes of oxygen functional groups detected via X-ray photoelectron spectroscopy and structural information from X-ray diffraction analysis and transmission electron microscopy. Although intrinsic GO having a $$\pi -{\pi }^{*}$$ π − π * transition at 230.5 ± 0.5 nm is stable only for 5 days at 298 K, the intrinsic state can be stabilized by either storing GO dispersions below 255 K or by adding ammonium peroxydisulfate.https://doi.org/10.1038/s41467-024-46083-4 |
| spellingShingle | Hayato Otsuka Koki Urita Nobutaka Honma Takashi Kimuro Yasushi Amako Radovan Kukobat Teresa J. Bandosz Junzo Ukai Isamu Moriguchi Katsumi Kaneko Transient chemical and structural changes in graphene oxide during ripening Nature Communications |
| title | Transient chemical and structural changes in graphene oxide during ripening |
| title_full | Transient chemical and structural changes in graphene oxide during ripening |
| title_fullStr | Transient chemical and structural changes in graphene oxide during ripening |
| title_full_unstemmed | Transient chemical and structural changes in graphene oxide during ripening |
| title_short | Transient chemical and structural changes in graphene oxide during ripening |
| title_sort | transient chemical and structural changes in graphene oxide during ripening |
| url | https://doi.org/10.1038/s41467-024-46083-4 |
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