Heterogeneous atoms in laser-induced synthesis of carbon black

Popovici, E.; Florescu, L. Gavrila; Soare, I.; Scarisoreanu, M.; Sandu, I.; Prodan, G.; Fleaca, C.; Morjan, I.; Voicu, I.

doi:10.1016/j.apsusc.2008.09.021

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…3,4 Carbon nanomaterials have been envisaged for applications ranging from electrodes 5 and sensors 6 to catalysts 7 and use in composite materials. 8 The most common preparation methods of carbon nanoparticles are chemical vapour deposition (CVD) 9,10 and pyrolysis 11 from hydrocarbon sources, as well as arc discharge and laser ablation from graphite. 12,13 Further synthesis methods include electron irradiation, microwave plasma, and laser irradiation.…”

Section: Introductionmentioning

confidence: 99%

Creation of spherical carbon nanoparticles and clusters from carbon dioxide via UV dissociation at the critical point

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Creation of spherical carbon nanoparticles and clusters from carbon dioxide via UV dissociation at the critical point

et al. 2012

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Oriented carbon nanostructures grown by hot-filament plasma-enhanced CVD from self-assembled Co-based catalyst on Si substrates

Fleaca¹,

Morjan²,

Alexandrescu³

et al. 2012

Physica E: Low-dimensional Systems and Nanostructures

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Micro-FTIR study of soot chemical composition—evidence of aliphatic hydrocarbons on nascent soot surfaces

Cain

Gassman

Wang

et al. 2010

Phys. Chem. Chem. Phys.

224

176

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Previous studies suggest that soot formed in premixed flat flames can contain a substantial amount of aliphatic compounds. Presence of these compounds may affect the kinetics of soot mass growth and oxidation in a way that is currently not understood. Using an infrared spectrometer coupled to a microscope (micro-FTIR), we examined the composition of soot sampled from a set of ethylene-argon-oxygen flames recently characterized (A. D. Abid, et al. Combust. Flame, 2008, 154, 775-788), all with an equivalence ratio Φ=2.07 but varying in maximum flame temperatures. Soot was sampled at three distances above the burner surface using a probe sampling technique and deposited on silicon nitride thin film substrates using a cascade impactor. Spectra were taken and analyses performed for samples collected on the lowest five impactor stages with the cut-off sizes of D(50)=10, 18, 32, 56 and 100 nm. The micro-FTIR spectra revealed the presence of aliphatic C–H, aromatic C–H and various oxygenated functional groups, including carbonyl (C=O), C–O–C and C–OH groups. Spectral analyses were made to examine variations of these functional groups with flame temperature, sampling position and particle size. Results indicate that increases in flame temperature leads to higher contents of non-aromatic functionalities. Functional group concentrations were found to be ordered as follows: [C=O]<[C–O]<[aliphatic C–H]. Aliphatic C–H was found to exist in significant quantities, with very little oxygenated groups present. The ratio of these chemical functionalities to aromatic C–H remains constant for particle sizes spanning 10-100 nm. The results confirm a previous experimental finding: a significant amount of aliphatic compounds is present in nascent soot formed in the flames studied, especially towards larger distances above the burner surface.

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Heterogeneous atoms in laser-induced synthesis of carbon black

Cited by 3 publications

References 11 publications

Creation of spherical carbon nanoparticles and clusters from carbon dioxide via UV dissociation at the critical point

Creation of spherical carbon nanoparticles and clusters from carbon dioxide via UV dissociation at the critical point

Oriented carbon nanostructures grown by hot-filament plasma-enhanced CVD from self-assembled Co-based catalyst on Si substrates

Micro-FTIR study of soot chemical composition—evidence of aliphatic hydrocarbons on nascent soot surfaces

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