Raman microspectroscopy characterization of carbon blacks: Spectral analysis and structural information

Pawlyta, Mirosława; Rouzaud, Jean-Noël; Düber, S.

doi:10.1016/j.carbon.2014.12.030

Cited by 443 publications

(284 citation statements)

References 30 publications

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“…The corresponding incident power, around 1.8 mW, was low enough to avoid any heating or damage of the samples. Each spectrum was obtained by accumulation of two spectra recorded from 50 to 5000 cm −1 over 120 s, and was fitted by using four mixed Gaussian-Lorentzian profiles for the bands D4, D1, D3, G and D2 appearing at increasingly high wavenumbers (see for example [68]). …”

Section: Raman Spectroscopymentioning

confidence: 99%

Hydrothermal Treatment of Tannin: A Route to Porous Metal Oxides and Metal/Carbon Hybrid Materials

et al. 2017

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Abstract:In the present paper, porous materials were prepared from the hydrothermal treatment of aqueous solutions of tannin, a renewable phenolic resource extracted from tree barks, containing dissolved salts of transition metals: V, Cr, Ni and Fe. Hydrothermal treatment produced carbonaceous particles doped with the aforementioned metals, and such materials were treated according to two different routes: (i) calcination in air in order to burn the carbon and to recover porous oxides; (ii) pyrolysis in inert atmosphere so as to recover porous metal/carbon hybrid materials. The nature of the metal salt was found to have a dramatic impact on the structure of the materials recovered by the first route, leading either to nano-powders (V, Cr) or to hollow microspheres (Ni, Fe). The second route was only investigated with iron, leading to magnetic Fe-loaded micro/mesoporous carbons whose texture, pore volumes and surface areas gradually changed with the iron content.

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Section: Raman Spectroscopymentioning

confidence: 99%

Hydrothermal Treatment of Tannin: A Route to Porous Metal Oxides and Metal/Carbon Hybrid Materials

et al. 2017

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“…Amorphous carbon has no crystal structure and is often referred to as free reactive carbon. Purely amorphous carbon structures are possible, but most amorphous carbon materials include microscopic graphite (sp 2 bonding) or diamond (sp 3 ) structural moieties at crystallite sizes (L a ) < 2 nm (Pawlyta et al, 2015). ) bands reflect a high degree of structural disorder.…”

Section: Sample Preparation and Analysismentioning

confidence: 99%

“…The graphitic-like domains termed as ''basic structural units'' (BSU) typically consist of 3-4 turbostratically stacked carbon polyaromatic layers (BSU sketch; Fig. 4C-c) and the amorphous parts dominate the core and sometimes form a skin of the primary particles (Pawlyta et al, 2015).…”

Section: Sample Preparation and Analysismentioning

confidence: 99%

“…D3 corresponds to the aromatic ring breathing mode (similar to D1 peak) and CeC stretching. The D4 peak is a measure of sp 2 -sp 3 bonds or vibrations from single and double bonded carbons (e.g., hydrocarbon or aliphatic moieties connected on BSUs) usually observed as a lower energy shoulder of the D1 peak (Bokobza et al, 2015;Pawlyta et al, 2015;Sadezky et al, 2005).…”

Section: Sample Preparation and Analysismentioning

confidence: 99%

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Evidence and origin of different types of sedimentary organic matter from a Paleoproterozoic orogenic Au deposit

Mirasol-Robert

Grotheer

Bourdet

et al. 2017

Precambrian Research

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A B S T R A C TCarbonaceous material (CM) is thought to be a key reductant contributing to the formation of large Au deposits, but there has been much speculation about its source, molecular composition and reactivity. The first successful analytical retrieval of organic compounds from a thermally over-mature (> 550°C) Paleoproterozoic CosmoHowley Orogenic Au deposit was recently achieved by Robert et al. (2016). Here, we have evaluated the nature of the CM associated with this high temperature Au mineralisation via an integrated analytical approach which combined high-resolution in situ laser Raman spectroscopy, micro to nano-scale imaging (e.g., EELS, HAADF-STEM, and HRTEM) and molecular and isotopic geochemistry. We identified two distinct CM types: CM ker -an ubiquitous highly graphitic kerogen typical of high-grade metamorphic conditions formed by regional metamorphism; and CM fd -small sub-microscopic inclusion-like nodules of highly disordered carbon rich in polycyclic aromatic hydrocarbons (PAHs), coincident within the Au-bearing sulfide minerals in hydrothermal vein regions. The paragenetic emplacement and molecular characteristics of CM fd suggests a formation by metasomatic processes and introduction by a hydrothermal fluid which might also have co-transported Au. CM ker and CM fd gave different Raman spectra indicative of their contrasting origin and structural response to regional and contact metamorphic history and subsequent metasomatism of the Cosmo-Howley deposit. Raman signals indicated CM ker had a graphitic like structure whereas CM fd comprised high concentrations or clusters of PAHs. The broad range of Raman spectra detected here (and by others in similar studies) was likely due to the mixed signals of these two types of CM. The δ 13 C values of PAH products released via the HyPy treatment of the parent and sequentially demineralised kerogen fractions were measured to be in the range of −20 to −30‰, indicative of an organic biopolymeric origin. The δ 13 C values of PAHs products decreased with demineralisation, concomitant with an increase in their concentrations and affinity to the sulfide-minerals (and associated CM fd ) suggesting a close relationship. The localised (within 20 mm) co-occurrence of different CM types and apparent abundance correlation of CM fd with Au and sulfides suggests Au mineralisation might be supported by specific CM types, and these relationships should be evaluated further including on a wider Au deposit scale.

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“…Most effective, at this point, method of determining the crystallographic ordering of the nanodispersed carbon samples is Raman spectroscopy, which allows to explore the structure of samples using characteristic peaks in the spectrum of the Raman shift upon irradiation of the obtained carbon samples with a laser. The use of the technique of Raman spectroscopy in the study of the carbon particles described in [1,2].…”

Section: Introductionmentioning

confidence: 99%

Investigation of formation process of nanodispersed carbon black particles during hydrocarbon thermal treatment at short reaction time

Лукашевич¹,

Shiplyuk

Maslov

2017

AIP Conference Proceedings

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ARTICLES YOU MAY BE INTERESTED IN MolecularAbstract. The work is devoted to study of the formation process of nanodispersed carbon black particles during thermal decomposition of methane at high temperature (T = 1500 -2200 K) high speed (V = 100 -300 m/s) carrier gas flow.Using the results of numerical simulation of mixing the scheme of test gas injection through the pylon from the slot opening width of 0.1 mm and baffles is chosen. A technique of measuring Raman spectra on the test sample of nanodispersed carbon is tested. The spectra of Raman shift is obtained in the desired frequency band with the characteristic peaks in the frequency 1350 cm -1 (D-band) and 1600 cm -1 (G-band) characterizing amorphous and crystalline phase of carbon black particles, respectively.

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Raman microspectroscopy characterization of carbon blacks: Spectral analysis and structural information

Cited by 443 publications

References 30 publications

Hydrothermal Treatment of Tannin: A Route to Porous Metal Oxides and Metal/Carbon Hybrid Materials

Hydrothermal Treatment of Tannin: A Route to Porous Metal Oxides and Metal/Carbon Hybrid Materials

Evidence and origin of different types of sedimentary organic matter from a Paleoproterozoic orogenic Au deposit

Investigation of formation process of nanodispersed carbon black particles during hydrocarbon thermal treatment at short reaction time

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