Shulga Yury M, Kabachkov Eugene N, Korepanov Vitaly I, Khodos Igor I, Kovalev Dmitry Y, Melezhik Alexandr V, Tkachev Aleksei G, Gutsev Gennady L
Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia.
Institute of New Materials and Nanotechnologies, National University of Science and Technology MISIS, Leninsky pr. 4, 119049 Moscow, Russia.
Nanomaterials (Basel). 2021 May 17;11(5):1324. doi: 10.3390/nano11051324.
The alkaline activation of a carbonized graphene oxide/dextrin mixture yielded a carbon-based nanoscale material (AC-TR) with a unique highly porous structure. The BET-estimated specific surface area of the material is 3167 m/g, which is higher than the specific surface area of a graphene layer. The material has a density of 0.34 g/cm and electrical resistivity of 0.25 Ω·cm and its properties were studied using the elemental analysis, transmission electron microscopy (TEM), electron diffraction (ED), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray induced Auger electron spectroscopy (XAES), and electron energy loss spectroscopy (EELS) in the plasmon excitation range. From these data, we derive an integral understanding of the structure of this material. The concentration of carbon atoms was found to be relatively low with an absolute value that depends on the measurement method. It was shown that there is no graphite-like (002) peak in the electron and X-ray diffraction pattern. The characteristic size of a -domain in the basal plane estimated from the Raman spectra was 7 nm. It was also found that plasmon peaks in the EELS spectrum of AC-TR are downshifted compared to those of graphite.
对碳化氧化石墨烯/糊精混合物进行碱活化，得到了一种具有独特高度多孔结构的碳基纳米材料（AC-TR）。通过BET估算，该材料的比表面积为3167 m/g，高于石墨烯层的比表面积。该材料的密度为0.34 g/cm，电阻率为0.25 Ω·cm，并使用元素分析、透射电子显微镜（TEM）、电子衍射（ED）、X射线衍射（XRD）、拉曼光谱、X射线光电子能谱（XPS）、X射线诱导俄歇电子能谱（XAES）以及等离子体激元激发范围内的电子能量损失谱（EELS）对其性能进行了研究。根据这些数据，我们对该材料的结构有了全面的了解。发现碳原子的浓度相对较低，其绝对值取决于测量方法。结果表明，在电子和X射线衍射图谱中没有类石墨（002）峰。根据拉曼光谱估算，基面中α域的特征尺寸为7 nm。还发现，与石墨相比，AC-TR的EELS光谱中的等离子体激元峰发生了下移。
