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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Structural and electronic structure investigations on sonication based synthesized graphene oxide and reduced-graphene oxide nano-sheets
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Structural and electronic structure investigations on sonication based synthesized graphene oxide and reduced-graphene oxide nano-sheets

机译：基于超声的合成石墨烯氧化物和石墨烯纳米片的结构和电子结构研究

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摘要

In the present study, we applied a sonication based method to achieve graphene oxide (GO) and reduced graphene oxide (r-GO) nano-structures. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM) and x-ray absorption near edge structure (XANES) spectroscopy measurements were applied to characterize the samples. XRD, TEM and Raman results demonstrate significant crystalline nature of GO nano sheets. On the other hand, the r-GO sample shows poor crystallinity with a large number of lattice defects. The FTIR spectrum conveys the attachment of significant oxygen-containing functional groups in GO sample. The detachment of oxygen function groups from the r-GO sample, under the reduction process, is also confirmed by the FTIR spectra. Local electronic structure investigations, from the C K-edge XANES of GO and r-GO nano sheets, convey the lowering of 1s -> pi* and 1s -> sigma* transitions and lesser sp(2) character of the carbon ring. The O K-edge XANES spectra have shown the accumulation of C = O sigma*, C-O sigma* and O-H sigma* states at the basal plane of GO and elimination of such functional groups in the r-GO samples and convey controlled tailoring of the functionalities of GO and r-GO nano sheets.
机译：在本研究中，我们应用了一种基于超声的方法来实现石墨烯（GO）和还原的氧化石墨烯（R-GO）纳米结构。 X射线衍射（XRD），拉曼光谱，傅立叶变换红外光谱（FTIR），透射电子显微镜（TEM）和近边缘结构（XANES）光谱测量附近的X射线吸收，以表征样品。 XRD，TEM和拉曼结果表明了Go Nano纸张的显着结晶性质。另一方面，R-GO样品显示出具有大量晶格缺陷的差的结晶度。 FTIR光谱传达在去样品中的含有显着氧的官能团的附着。通过FTIR光谱还证实了来自R-GO样品的氧函数组的脱离。来自Go和R-Go纳米片的C K-Edge Xanes的本地电子结构调查，传达1S - > Pi *和1s - > Sigma *过渡和较小的碳环的SP（2）字符。 O K-Edge Xanes Spectra显示了C = O Sigma *，Co Sigma *和OH Sigma *的累积，并在R-Go样本中消除这些功能组的基础平面并传达控制剪裁Go和R-Go纳米纸的功能。

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