Journal ArticleDOI
Structural characterization of Nigerian coals by X-ray diffraction, Raman and FTIR spectroscopy
TLDR
In this paper, the structural parameters of six Nigerian coals were determined by X-ray diffraction, Raman and FTIR spectroscopy, which revealed that the coals contain crystalline carbon of turbostratic structure with some amount of highly disordered amorphous carbon.About:
This article is published in Energy.The article was published on 2010-12-01. It has received 391 citations till now. The article focuses on the topics: Raman spectroscopy & Amorphous carbon.read more
Citations
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FTIR and Raman spectroscopy characterization of functional groups in various rank coals
TL;DR: In this paper, the chemical and physical properties of coal were investigated using FTIR and Raman spectroscopy, and correlations were established for these parameters, showing that coal structure is complex with three stage characteristics at R o ǫ = 0.4 −1.4−1.3, 1.3 −2.0% and 2.0 −4.0%.
Journal ArticleDOI
Nitrogen-doped porous graphitic carbon as an excellent electrode material for advanced supercapacitors.
TL;DR: The synthesized NPGC material, without the need for any conductive additives, showed excellent capacitive behavior, long-term cycling stability, and high coulombic efficiency in KOH when used as an electrode, and could be a highly promising electrode material for advanced supercapacitors and other conversion devices.
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Porous Graphitic Carbon Nanosheets Derived from Cornstalk Biomass for Advanced Supercapacitors
TL;DR: Series experiments indicate that PGCS can only be formed when using an iron-based catalyst that can generate a carburized phase during the pyrolytic process, and holds great promise for preparing PGCS from natural resources, including cornstalks, as advanced electrodes in supercapacitors.
Journal ArticleDOI
Molecular structure characterization of middle-high rank coal via XRD, Raman and FTIR spectroscopy: Implications for coalification
TL;DR: In this article, molecular structural properties of five MHRC samples using X-ray diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy were investigated.
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Macromolecular and pore structures of Chinese tectonically deformed coal studied by atomic force microscopy
TL;DR: In this article, the macromolecular and nanoscale pores of different types of tectonically deformed coals were characterized by AFM and the nanostructures of coal differed in terms of the metamorphism degree, deformation degree, and deformation properties.
References
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Journal ArticleDOI
Interpretation of Raman spectra of disordered and amorphous carbon
Andrea C. Ferrari,John Robertson +1 more
TL;DR: In this paper, a model and theoretical understanding of the Raman spectra in disordered and amorphous carbon is given, and the nature of the G and D vibration modes in graphite is analyzed in terms of the resonant excitation of \ensuremath{\pi} states and the long-range polarizability of the long range bonding.
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Raman Spectrum of Graphite
F. Tuinstra,J. L. Koenig +1 more
TL;DR: Raman spectra are reported from single crystals of graphite and other graphite materials as mentioned in this paper, and the Raman intensity of this band is inversely proportional to the crystallite size and is caused by a breakdown of the k-selection rule.
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Raman microspectroscopy of soot and related carbonaceous materials: Spectral analysis and structural information
TL;DR: In this article, experimental conditions and mathematical fitting procedures for the collection and analysis of Raman spectra of soot and related carbonaceous materials have been investigated and optimised with a Raman microscope system operated at three different laser excitation wavelengths (514, 633, and 780 nm).
Journal ArticleDOI
Characterization of diamond films by Raman spectroscopy
Diane S. Knight,William B. White +1 more
TL;DR: The Raman spectrum of hexagonal diamond (lonsdaleite) is distinct from that of the cubic diamond and allows it to be recognized as discussed by the authors, and the Raman line width varies with mode of preparation of the diamond and has been related to degree of structural order.
Journal ArticleDOI
Raman spectroscopic characterization of some commercially available carbon black materials
T. Jawhari,A. Roid,J. Casado +2 more
TL;DR: In this article, a comparative study of the intensity, bandwidth and frequency shifts of the D and G bands, as well as the broad amorphous feature, is presented, and a curve fitting method is also proposed in order to improve the accuracy in determining the spectroscopic parameters of the main Raman bands.