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Universal strategy for reversing aging and defects in graphene oxide for highly conductive graphene aerogels
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SYSNO ASEP 0572518 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Universal strategy for reversing aging and defects in graphene oxide for highly conductive graphene aerogels Author(s) Kumar, Prabhat (FZU-D) ORCID
Šilhavík, Martin (FZU-D) ORCID
Zafar, Zahid Ali (FZU-D) ORCID
Červenka, Jiří (FZU-D) RID, ORCIDNumber of authors 4 Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 127, č. 22 (2023), s. 10599-10608Number of pages 10 s. Language eng - English Country US - United States Keywords graphene ; graphene oxide ; aerogels ; aging ; defects OECD category Nano-materials (production and properties) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA23-05895S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001005949900001 EID SCOPUS 85162773660 DOI 10.1021/acs.jpcc.3c01534 Annotation Here, we report a universal strategy to reverse the aging of graphene oxide precursors using oxygen plasma treatment. This treatment decreases the size of graphene oxide flakes and restores negative zeta potential and suspension stability in water, enabling the fabrication of compact and mechanically stable graphene aerogels using hydrothermal synthesis. Moreover, we employ high-temperature annealing to remove oxygen-containing functionalities and repair the lattice defects in reduced graphene oxide. This method allows obtaining highly electrically conducting graphene aerogels with electrical conductivity of 390 S/m and low defect density. The role of carboxyl, hydroxyl, epoxide, and ketonic oxygen species is thoroughly investigated using X-ray photoelectron and Raman spectroscopies. Our study provides unique insight into the chemical transformations occurring during the aging and thermal reduction of graphene oxide from room temperature up to 2700 °C. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0343573
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