Showing papers in "Carbon in 2008"

TL;DR: In this article, the effect of oxidation on the structural integrity of multiwalled carbon nanotubes through acidic (nitric acid and a mixture of sulfuric acid and hydrogen peroxide) and basic (ammonium hydroxide/hydrogen peroxide), agents has been studied.

TL;DR: In this paper, chemically modified graphene sheets are obtained through solvothermal reduction of colloidal dispersions of graphite oxide in various solvents, where reduction occurs at relatively low temperatures (120-200°C) and self-generated pressure in the sealed reaction vessel and the reducing power of the solvent influences the extent of reduction.

TL;DR: In this article, wood origin activated carbon was oxidized and then treated with melamine and urea followed by carbonization at 950 degrees C in an inert atmosphere, and the modified carbons revealed significantly enhanced capacitances in 1 M H2SO4 reaching 300 F/g and the capacitance retention ratio is 86% at the current load of 1 A/g.

TL;DR: Cheng et al. as mentioned in this paper proposed a Chinese Academics, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenya 110016, Peoples R China;cheng@imr.ac.cn

TL;DR: In this article, the chemical structure of phosphorus species in two series of polymer-based and fruit-stone-based carbons obtained by phosphoric acid activation at 400-1000°C were investigated by XPS and solid state 31 P-NMR and 13 C -NMR.

TL;DR: In this article, a chemically functionalized exfoliated graphite-filled epoxy composites were prepared with load levels from 2% to 20% by weight, and wide-angle X-ray diffraction revealed a rhombohedral carbon structure in the filler.

TL;DR: In this article, the authors focused on the imaging mechanism of tapping mode AFM (TAFM) when measuring graphene and few layer graphene (FLG) flakes on silicon oxide surfaces, and showed that at certain measurement parameters significant deviations can be introduced in the measured thickness of FLG flakes.

TL;DR: In this paper, the effects of CO 2 treatment on the pore structures of carbon CS15A6 were discussed and the results showed that CO 2 activation leads to better capacitive performances.

TL;DR: In this article, a systematic, time-dependent, surface-sensitive study has been conducted to study the mechanism of sulfuric/nitric acid oxidation of graphene-containing materials, such as carbon fibers and carbon nanotubes.

TL;DR: In this paper, carbon nanotubes were easily coated with a reactive biopolymer, polydopamine (Pdop), by dispersing them in a dopamine solution and mildly stirring at room temperature.

TL;DR: A simple approach to decorate carbon nanotube (CNT) with silver nanoparticles (Ag-NPs) was developed to enhance the electrical conductivity of CNT.

TL;DR: In this paper, a mesoporous carbon (S-C) composites were tested in a novel ionic liquid electrolyte consisting of 1-ethyl-3methylimidazolium bis(trifluoromethanesulfonyl)imide and lithium bistrifluorsulfonimidate.

TL;DR: In this article, the analysis of the G′ band profile in the Raman spectra of nanographites with different degrees of stacking order is presented, and the relative volumes of 3D and 2D graphite phases present in the samples can be estimated from their Raman Spectra.

TL;DR: In this article, a templating technique was used to produce highly porous nitrogen enriched carbons from melamine-formaldehyde resins, which resulted in the greater stability of the adsorbents in terms of volatile and thermal loss of nitrogen.

TL;DR: In this article, the growth of carbon nanotubes by a plasma assisted catalytic chemical vapor deposition was investigated using cobalt, nickel and iron catalyst particles of different sizes, and it was shown that the growth mode switches from "tip-growth" for large particles (>>5nm) to "base growth" for smaller ones (

TL;DR: In this article, a well-dispersed epoxy/single-walled carbon nanotube (epoxy/SWCNT) composites were prepared by oxidization and functionalization of the SWCNT surfaces using polyamidoamine generation-0 (PAMAM-0) dendrimer.

TL;DR: In this article, carboxylated multiwalled carbon nanotubes (MWCNTs) dispersed with sodium dodecyl sulfate were used for reinforcement of natural rubber.

TL;DR: In this article, a woven carbon fiber (CF) laminae is functionalized with carbon nanotubes (CNTs) to test the hypothesis that growing CNTs on CF would enhance the properties of polymeric carbon composites.

TL;DR: The physicico-chemical properties of the obtained carbon nanotubes, such as the C/N ratio or the nitrogen type, were related to the synthesis parameters as mentioned in this paper, which can be explained by the thermodynamic stabilities of the different metal-carbides, leading to a "pulsating" growth in the case of Fe as opposed to a more continuous growth in Co or Ni.

TL;DR: Sulfonated ordered mesoporous carbons (OMC) have been synthesized by covalent attachment of sulfonic acid-containing aryl radicals on the surface of mesopore carbons.

TL;DR: In this article, a numerical study is proposed to investigate and predict the thermal performance of graphite foams infiltrated with phase change materials, PCMs, for space and terrestrial energy storage systems.

TL;DR: In this paper, the tensile properties and fracture behavior of PAN-based, K13D and high ductility pitch-based carbon fibers were investigated and the Weibull modulus for the T1000GB, K 13D and XN-05 fibers were calculated.

TL;DR: In this article, a simple method is devised to deposit highly monodispersed Ag nanoparticles (about 5 nm) on multi-walled carbon nanotubes (CNTs).

TL;DR: In this paper, a composite material consisting of carbon nanotubes (CNTs) combined with cellulose paper has been developed, which is capable of shielding electromagnetic interference over the tested range of 15-40 GHz, particularly in range of 30-40GHz, with absorption as the essential shielding mechanism.

TL;DR: In this article, the adsorption mechanism of nickel at a molecular level was attributed to chemical interaction between nickel and the surface functional groups of MWCNTs and surface adsorbed SDBS.

TL;DR: In this article, a density functional theory for carbon nanoribbons with zigzag edges containing one substitutional nitrogen atom per 154 carbon atoms has been proposed, and it has been shown that the formation energies depend on the nitrogen doping site, as do the electrical properties.

TL;DR: In this paper, two methods currently used to characterize oxygen-containing functional groups on the surface of carbon materials are compared, namely potentiometric titration (PT) and temperature-programmed desorption (TPD).

TL;DR: In this article, mesoporous phenolic resin-based carbons were prepared by soft-templating synthesis and activated by KOH, which resulted in a substantial increase of microporosity with simultaneous preservation of mesopural structure.