Počet záznamů: 1
Universal strategy for reversing aging and defects in graphene oxide for highly conductive graphene aerogels
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SYSNO ASEP 0572518 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Universal strategy for reversing aging and defects in graphene oxide for highly conductive graphene aerogels Tvůrce(i) Kumar, Prabhat (FZU-D) ORCID
Šilhavík, Martin (FZU-D) ORCID
Zafar, Zahid Ali (FZU-D) ORCID
Červenka, Jiří (FZU-D) RID, ORCIDCelkový počet autorů 4 Zdroj.dok. Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 127, č. 22 (2023), s. 10599-10608Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova graphene ; graphene oxide ; aerogels ; aging ; defects Obor OECD Nano-materials (production and properties) CEP EF16_019/0000760 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA23-05895S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora FZU-D - RVO:68378271 UT WOS 001005949900001 EID SCOPUS 85162773660 DOI https://doi.org/10.1021/acs.jpcc.3c01534 Anotace 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. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2024 Elektronická adresa https://hdl.handle.net/11104/0343573
Počet záznamů: 1