Graphene oxide (GO) with an abnormal structure was isolated in an alcoholic solvent. An abnormally low C–O/C–C ratio and large red-shift of the CO vibration indicated that the GO was a reduction intermediate of graphene oxide, which could be reduced more easily under mild conditions, even...
(a) Raman spectra of reduced graphene oxide (rGO) film at different thermal reduction temperature. (b) XRD patterns of graphite, GO, and rGO films. UV-Vis spectra of (c) GO dispersion as a function of ultrasonication time, and (d) rGO film as a function of thermal reduction time. Ther...
Low-temperature aluminum (Al) reduction is first introduced to reduce graphene oxide (GO) at 100–200 °C in a two-zone furnace. The melted Al metal exhibits an excellent deoxygen ability to produce well-crystallized reduced graphene oxide (RGO) papers with a low O/C ratio of 0.058 (Al-...
We now turn to the main topic of this study—the thermal conductivity of graphene composites at cryogenic temperatures. Figure3ashows the thermal conductivity,\(k\), measured using PPMS in the temperature range from 2 K to RT in a log-log scale. The details of the measurements and error ca...
This study presented preparation of novel material of graphene oxide (GO) and reduced graphene oxides (rGO) based on high purity highly crystalline but low-cost needle platy (NPG) variety of natural vein graphite. It is revealed here that the modified chemical oxidation and the reduction methods...
2.3Reduced graphene oxide Reduced graphene oxide(rGO) refers to the graphene-like nanosheet, which is prepared by the reduction of GO via chemical reduction[61], electrochemical reduction[62], and thermal reduction[63,64]. rGO has higher electrical and thermal conductivity than GO due to the red...
UV light exposure of aqueous graphene oxide suspensions to promote their direct reduction, formation of graphene–metal nanoparticle hybrids and dye degrad... The use of UV light to trigger different processes involving graphene oxide sheets suspended in aqueous medium at room temperature has been inve...
Powder XRD shows the broad peak at 2胃=24.3掳 corresponding to interlayer spacing 3.66A which is smaller than the graphene oxide (GO). UV-vis-NIR of rGO displays the absorption peak at 271 nm indicates the reduction of GO and the restoration of C=C bonds in the rGO sheets. ...
graphene oxide with similar properties as graphene and has been prepared from graphene oxide using various methods such as thermal and chemical methods (Compton and Nguyen, 2010). It is prepared by the reduction of abundant oxygen present in the graphene oxide. Thus, rGO has a different ...
The porous copper/single-layer graphene/graphene oxide composite (p-Cu/G/rGO) had a porosity of approximately 35%, and the measured pore size was approximately 10 to 100 µm. The internal GO was reduced at a temperature of 1000 °C. On observing the heat distribution in the structure ...