期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 142, 期 1, 页码 331-337出版社
SPRINGER
DOI: 10.1007/s10973-020-09719-3
关键词
Reduced graphene oxide; Improved Hummers' method; Thermal analysis (TG-DTG; TG-MS); Raman spectroscopy
资金
- NRDI Fund [K128410]
- BME-Nanotechnology FIKP Grant of EMMI (BME FIKP-NAT)
- Nanoporous and Nanostructured Materials for Medical Applications [H2020-MSCA-RISE-2016-734641 NanoMed]
- EU
- European Regional Development Fund
- Stipendium Hungaricum scholarship program
- [VEKOP-12.3.2-16-2017-00013]
Graphene oxide (GO) is not only an intermediate in top-down graphene preparation, but it is also acknowledged for its convenient application when the hydrophobicity of graphene is a drawback. Its preparation through the wet exfoliation of graphite inevitably leads to a product lacking several of the outstanding features of graphene. The destroyed graphene structure can be at least partially reconstructed by thermal and/or wet chemical reduction. Thermally reduced graphene oxide (TRGO) was obtained by mild heat treatment (300 degrees C) in argon, while chemically reduced graphene oxide (CRGO) was prepared by using a green reagent, ascorbic acid (AA). The parent GO and the two GO derivatives were compared by thermogravimetric analysis coupled with mass spectroscopy and Raman spectroscopy. Both reductive treatments resulted in enhanced thermal stability and higher C/O ratio. Although the chemical reduction with AA was more efficient in the elimination of the O functionalities, it also resulted in significant fragmentation of the graphene-like platelets.
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