Author, as appears in the article.: Bartolome, Joanne P.; Fragoso, Alex;
Department: Enginyeria Química
URV's Author/s: Fragoso Sierra, Alex
Keywords: Transformation Radio frequency plasma Polymer Nanodiamond Fullerenes Carbon nano-onion Annealing
Abstract: Carbon nanomaterials can be prepared by several methods having in common that need a carbon source and often require high energies. In this study, we report the synthesis and characterization of carbon nano-onions by annealing of commercially available nanodiamonds and explore for the first time their functionalization with a radio frequency Ar/O2 plasma. Heat treatment of nanodiamonds at 1200°C for 6 hours under argon atmosphere afforded small spherical carbon nano-onion particles of 3-4 nm diameter and 5-6 graphitic shells. The prepared CNOs were visualized by HRTEM and showed the characteristic XRD and Raman features. The results have been compared with a sample prepared by annealing at 1600°C. Plasma functionalization in Ar/O2 atmosphere was used to introduce oxygen moieties into the surface of synthesized CNOs. X-ray photoemission spectroscopy showed that oxygen-containing groups like C─O, C═O and O─C═O were introduced on the surface of CNOs, a process that is accompanied by a surface reorganization as evidenced by the change of ID/IG ratios in the Raman spectra, indicating a conversion of sp2 to sp3 as a result of functionalization in the surface of CNO.
Thematic Areas: Química Physics, atomic, molecular & chemical Physical and theoretical chemistry Organic chemistry Nanoscience and nanotechnology Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais General materials science Farmacia Engenharias iii Chemistry, physical Biotecnología Atomic and molecular physics, and optics Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: alex.fragoso@urv.cat
Author identifier: 0000-0003-4839-6094
Record's date: 2023-05-20
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.tandfonline.com/doi/abs/10.1080/1536383X.2017.1303604
Papper original source: Fullerenes Nanotubes And Carbon Nanostructures. 25 (5): 327-334
APA: Bartolome, Joanne P.; Fragoso, Alex; (2017). Preparation and characterization of carbon nano-onions by nanodiamond annealing and functionalization by radio-frequency Ar/O2 plasma. Fullerenes Nanotubes And Carbon Nanostructures, 25(5), 327-334. DOI: 10.1080/1536383X.2017.1303604
Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1080/1536383X.2017.1303604
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
Publication Type: Journal Publications
Repositori URV