The structural analysis is carried out by X‐ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, high‐resolution transmission electron microscopy (HRTEM), X‐ray photoelectron spectroscopy (XPS), UV﹙is absorption spectroscopy and photoluminescence (PL) spectroscopy...
氧化石墨烯(grapheneoxide,GO):一种通过氧化石墨得到的层状材料。体相石墨经发烟浓酸溶液处理后,石墨烯层被氧化成亲水的石墨烯氧化物,石墨层间距由氧化前的3.35Å增加到7~10Å,经加热或在水中超声剥离过程很容易形成分离的石墨烯氧化物片层结构。XPS、红外光谱(IR)、固体核磁共振谱(NMR)等表征结果显示石墨烯氧...
This study focused on developing electrochemical sensors for ACh detection, utilizing graphene oxide (GO) and a composite of reduced graphene oxide and zinc oxide (rGO/ZnO). The synthesis involved modified Hummers' and hydrothermal methods, unveiling the formation of rGO through deoxygenation and the...
We report the feasibility of using reduced graphene oxide (RGO) as a cost-effective and high performance cathode material for sodium-ion batteries (SIBs). Graphene oxide is synthesized by a modified Hummers’ method and reduced using a solid-state microw
All XPS measurements were taken in a SIGMA PROBE (ThermoVG) using a monochromatic Al-Kα X-ray source at 100 W. Surface analyses of graphene papers were collected by optical microscopy (Microscopes Inc., wm0039000a S39A). The microstructure was observed by field emission scanning electron ...
Keggin clustersNanocompositesIonic liquidLithium-ion batteriesEnergy storageThe nanocomposites of reduced graphene oxide (RGO) and polyoxometalates (POMs) have been considered to be effective to boost more Li + to participate in intercalation/deintercalation process of lithium-ion batteries (LIBs). In ...
gives featureless background. Capacitive background current of graphene modified GC is much higher than that of GC3730Reduced graphene oxide was dispersed by sonication in DMF (1mL) solution and then casting GC into the solution. Graphene film thickness on GC is not determined. Some XPS data is...
The results of the methods of graphene oxide and reduced graphene oxide characterization using the XRD, TEM and surface sensitive electron spectroscopy methods (XPS and REELS of similar information depth values) are consistent. The commercial graphene oxide (FL-GOc) shows: (i) about 22 nm × 6...
(b) XPS spectra of the Pyr-rGO and rGO, and (c) Raman spectra of the GO, rGO and Pyr-rGO. Full size image Raman spectroscopy was used to analyze the structural changes during the supramolecular assembly and reduction process. As indicated in Fig. 2c, the GO, rGO and Pyr-rGO ...
Lithium-sulfur (Li-S) batteries exhibit the high specific capacity and energy density, but prevented by the low coulombic efficiency and weak cycle life. Herein, we fabricate reduced graphene oxide (r-GO) three-dimensional (3D) foams encapsulating polar