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) ...

Mixed matrix PVDF polymeric membranes were incorporated with β–CD grafted graphene oxide (GO) nanocomposites (β–CD-g-GO) via nonsolvent induced phase separation method and used in the ...

In this study, our aim was to synthesize CoNi-carbide (CoNi-C)/reduced graphene oxide (rGO) hybrids by annealing CoNi-cyanide bridged coordination polymers (CoNi-CP) under a nitrogen atmosphere....

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 ...

2014年8月1日 · The survey XPS spectra recorded from the commercial samples FL-GOc and FL-RGOc show at the surface carbon, oxygen and traces of calcium, whereas the prepared graphene oxide and reduced graphene oxide show carbon, oxygen and sulphur contamination resulting from traces of sulphuric acid.

2017年7月12日 · Used as glucose sensing material, the 3D NiO hollow sphere/rGO composite modified electrode exhibits high sensitivity of ~2.04 mA mM −1 cm −2, quick response time of less than 5 s, good stability,...

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...

2015年9月1日 · Here, we used in-situ thermal annealing and X-ray photoelectron spectrometry (XPS) to identify the functional groups present in GO, produced by the Hummer's process. This was done by keeping the temperature window narrow and in the process, a temperature was identified at which carboxyls were being formed on GO.

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。

2021年10月26日 · We demonstrate a novel, flexible sensor with graphene oxide/PEDOT:PSS (GO/PEDOT:PSS) composite for voltammetric determination of selective low levels of dopamine. The well-distributed GO and...