Articles producció científica> Enginyeria Química

Preparation and characterization of carbon nano-onions by nanodiamond annealing and functionalization by radio-frequency Ar/O2 plasma

  • Dades identificatives

    Identificador: imarina:5131050
    Autors:
    Bartolome, Joanne PFragoso, Alex
    Resum:
    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.
  • Altres:

    Autor segons l'article: Bartolome, Joanne P; Fragoso, Alex
    Departament: Enginyeria Química
    Autor/s de la URV: Fragoso Sierra, Alex
    Paraules clau: Transformation Radio frequency plasma Polymer Nanodiamond Fullerenes Carbon nano-onion Annealing
    Resum: 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.
    Àrees temàtiques: 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
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: alex.fragoso@urv.cat
    Identificador de l'autor: 0000-0003-4839-6094
    Data d'alta del registre: 2024-10-12
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://www.tandfonline.com/doi/abs/10.1080/1536383X.2017.1303604
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Fullerenes Nanotubes And Carbon Nanostructures. 25 (5): 327-334
    Referència de l'ítem segons les normes 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
    DOI de l'article: 10.1080/1536383X.2017.1303604
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2017
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Atomic and Molecular Physics, and Optics,Chemistry, Physical,Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Nanoscience & Nanotechnology,Nanoscience and Nanotechnology,Organic Chemistry,Physical and Theoretical Chemistry,Physics, Atomic, Molecular & Chemical
    Transformation
    Radio frequency plasma
    Polymer
    Nanodiamond
    Fullerenes
    Carbon nano-onion
    Annealing
    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
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