2019年8月1日 · 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) ...

2014年8月1日 · The number of methods for a large scale graphene production has been already employed. 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.

与rgo相比，ozg-800中的酸峰向较低温度区域移动，表明部分氧官能团被去除并形成中强酸位点，这与xps表征中c和o元素的变化一致。 在1200°C下煅烧后，OZG-1200的酸性位点转变为369.4 °C。

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...

Graphene oxide (GO) was prepared using the modified Hummers’ method and a reduction step was held on GO films to produce reduced GO (rGO). C-TCEs were fabricated by over-coating the AgNWs...

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...

2020年3月1日 · The suitability of graphene oxide (GO) foils as radiation sensitive materials for soft X-ray irradiation is investigated by means of X-ray photoelectron spectroscopy (XPS). In particular GO micrometric foils have been irradiated by soft X-rays at a 1486.6 eV energy at high flux (>10 12 photons/cm 2 s) in ultra-high vacuum.

2009年10月9日 · We developed a simple chemical method to obtain bulk quantities of N-doped, reduced graphene oxide (GO) sheets through thermal annealing of GO in ammonia. 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 ...

2020年4月23日 · X-ray photoelectron spectroscopy (XPS) was used to determine the chemical composition of the initial graphene oxide (GO), brominated graphene (rGO-Br) and aminated graphene...

Graphene oxide (GO) layers are the individual sheets of conventional graphite oxide (CGO) synthesized from graphene layers of graphite. Oxidation of graphite leads to the formation of GO whose structure and the mechanism of formation are still unclear and need further investigation.