Graphene Oxide and Fumed Silica Graphene Oxide Nanocomposites Modification by Thermal Treatments

Risultato della ricerca: Otherpeer review

5 Citazioni (Scopus)


In the present study we investigate post synthesis thermal treatments up to 400 °C of graphene oxide (GrO)prepared from commercial graphite and of GrO–silica nanocomposites prepared by a solution of commercialFumed silica nanoparticles (average diameter 7 nm or 40 nm) and the GrO. The thermal treatments werecarried out in air, vacuum or He atmosphere to highlight tunable changes. Two GrO batches with smalldifferences in the D (~1350 cm–1) and G (~1580 cm–1) Raman bands have been employed to evaluateeffects depending on preparation. Thermal effects have been monitored through the Raman spectroscopyfocusing on D, G and 2D (2500–3500 cm–1) bands spectral ranges.The experiments evidenced that the I(D)/I(G) amplitude ratio and the 2D region profile change during thermaltreatments in the range below 180 °C with maximum rate at ~120 °C. At higher temperature, with maximumefficiency at about 200 °C, only the D and G bands show modifications with a tendency to decrease I(D)/I(G)and reduce the G band width. The comparison among GrO batches and nanocomposite evidences that thethermal history during preparation and defective structures of GrO are key factors for the final material.
Lingua originaleEnglish
Numero di pagine6
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.2200.2208???
  • ???subjectarea.asjc.1700.1706???
  • ???subjectarea.asjc.2500.2500???


Entra nei temi di ricerca di 'Graphene Oxide and Fumed Silica Graphene Oxide Nanocomposites Modification by Thermal Treatments'. Insieme formano una fingerprint unica.

Cita questo