High Yield synthesis of aspect ratio controlled graphenic materials from anthracite coal in supercritical fluids
Langue
en
Article de revue
Ce document a été publié dans
ACS Nano. 2016-05-24, vol. 10, n° 5, p. 5293-5303
American Chemical Society
Résumé en anglais
This paper rationalizes the green and scalable synthesis of graphenic materials of different aspect ratios using anthracite coal as a single source material under different supercritical environments. Single layer, ...Lire la suite >
This paper rationalizes the green and scalable synthesis of graphenic materials of different aspect ratios using anthracite coal as a single source material under different supercritical environments. Single layer, monodisperse graphene oxide quantum dots (GQDs) are obtained at high yield (55 wt %) from anthracite coal in supercritical water. The obtained GQDs are ∼3 nm in lateral size and display a high fluorescence quantum yield of 28%. They show high cell viability and are readily used for imaging cancer cells. In an analogous experiment, high aspect ratio graphenic materials with ribbon-like morphology (GRs) are synthesized from the same source material in supercritical ethanol at a yield of 6.4 wt %. A thin film of GRs with 68% transparency shows a surface resistance of 9.3 kΩ/sq. This is apparently the demonstration of anthracite coal as a source for electrically conductive graphenic materials.< Réduire
Mots clés en anglais
Supercritical fluids
Bioimaging
Coal
Conductive graphenic ribbons
Emissive graphene oxide quantum dots
Project ANR
Initiative d'excellence de l'Université de Bordeaux
Origine
Importé de halUnités de recherche