In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

Abstract

Raman and IR investigations indicated the presence of reduced graphene oxide (rGO)-like residues on ceria nanoparticles after solvothermal treatment in ethanol. The appearance of such structures is closely related to cerium tert-butoxide as precursor and ethanol as solvothermal solvent. The rGO-like residues improve the catalytic CO oxidation activity. This was also confirmed by introduction of “external” graphene oxide during sol–gel processing, by which the rGO structures and the catalytic activity were enhanced.

Enhancement of Heat Dissipation in LED Using Graphene and Carbon Nanotubes

“…The shape, position, and relative intensity of the G' band determine the number of layers of the film, which can be used to determine the number of graphene layers. 20,21 If the graphene has defects, then D' band will appear near 1620cm −1 . The intensity of both D and D' peak increases with the defect density.…”

In situ Raman study of laser‐induced stabilization of reduced nanoceria (CeO2−x) supported on graphene

“…[4] Recently, outstanding catalytic and photocatalytic performances of CeO 2 supported on graphene and graphene oxide have been demonstrated. [1,2,5] We report on in situ laser-induced formation of CeO 2−x NPs/graphene nanostructure studied by Raman spectroscopy. The process is demonstrated to be accompanied with charge transfer between CeO 2−x NPs and the graphene, which is confirmed by modification of the graphene Raman spectrum in the CeO 2−x /graphene system.…”

“…Bonding of CeO 2− x nanoparticles (NPs) to graphene is realized due to dispersion interactions (van der Waals forces) between the adsorbent (graphene) and the adsorbate (CeO 2− x particles) . Recently, outstanding catalytic and photocatalytic performances of CeO 2 supported on graphene and graphene oxide have been demonstrated …”