Aug 1, 2019 · The chemical states of composing elements of GO's were investigated by X-ray photoelectron spectroscopy (XPS) using ThermoFisher ESCALAB 250i system. The binding energy values of XPS lines were calibrated using the C 1s peak of adventitious carbon at 284.8 eV as a reference.

Aug 1, 2014 · These methods involve: mechanical cleaving, epitaxial growth, chemical vapor deposition, tearing of carbon nanotubes and reduction of produced graphene oxide (GO) from graphite and/or exfoliated graphite, direct exfoliation of graphite in a solvent.

Reduced graphene oxide (RGO)/Ni composites with high-performance microwave absorption were successfully synthesized through the electroless plating. The structures and morphologies of the materials...

Oct 9, 2009 · X-ray photoelectron spectroscopy (XPS) study of GO sheets annealed at various reaction temperatures reveals that N-doping occurs at a temperature as low as 300 °C, while the highest doping level of ∼5% N is achieved at 500 °C.

The XPS spectrum of Fe-2p of composite LMFO/rGO is shown in Fig. 8b, revealing the shifting of the position of Fe 2p 3/2, satellite peaks, and Fe 2p 1/2 towards higher binding energy compared...

C1s XPS spectra of graphene oxide samples: (a) GO, (b) bwGO, (c) rGO and rbwGO. The results from O1s spectra of GO samples confirm the C1s results according to which the graphite structure is strongly oxidized and contains different oxygen functionalities.

Jan 15, 2018 · In the present work, we accurately investigated the Si–GO interaction with x-ray photoelectron spectroscopy. In order to avoid external substrate oxidation factors we used EtOH as the GO solvent instead of water, and thermal annealing was carried out in UHV.

Feb 25, 2016 · In this paper, we show how to control the oxygen content of graphitic carbons by the oxidation of graphite and by the reduction of highly oxidized GO and propose guidelines for tailor-making...

The XPS in Figure 2 shows the shift of C1s binding energy of the WO3-GO, PEDOT and PEDOT@WO3-GO samples.

Aug 1, 2019 · High quality graphene oxide (GO) and reduced graphene oxide (rGO) have been synthesized by chemical oxidation of graphite flakes via three modified Hummers methods using a mixture of sulfuric acid (H2 SO 4), phosphoric acid (H3 PO 4) and nitric acid (HNO3) as intercalating agents and potassium permanganate (KMnO4) and hydrogen peroxide (H2 O 2) ...