Showing papers in "Carbon in 2014"

TL;DR: In this paper, the surface functionalization of DGEBA layer was found to effectively improve the compatibility and dispersion of GO sheets in epoxy matrix, and increased glass transition temperature and thermal stability was also observed in the dynamic mechanical properties and thermo-gravimetric analysis.

TL;DR: In this paper, a three-dimensional flower-like and hierarchical porous carbon material (FHPC) has been fabricated through a simple and efficient carbonization method followed by chemical activation with flowerlike ZnO as template and pitch as carbon precursor.

TL;DR: In this article, a review of recent reports on the preparation of S-doped carbons, with special emphasis on porous carbons with intrinsically doped sulfur, is presented.

TL;DR: In this paper, a multilayer graphene/polymer composite films with good mechanical flexibility were fabricated into paraffin-based sandwich structures to evaluate electromagnetic interference (EMI) shielding.

TL;DR: In this paper, a comparative review of carbon-based support materials is provided, including carbon nanotubes and fibers, mesoporous carbon, multi-layer graphene (undoped and doped with metal nanoparticles) and reduced graphene oxide.

TL;DR: In this article, carbon nanotubes (CNTs) are in situ formed on reduced graphene oxide (RGO) sheet at 600°C and the minimum value of reflection coefficient and the corresponding frequency are −55 dB and 10.1 GHz, respectively, and the effective absorption bandwidth reaches 3.5 GHz.

TL;DR: In this article, carbon nanotubes and graphene nanoplatelets were dispersed by ultrasonication into an epoxy matrix and the effects of CNT:GNP ratios on the mechanical and electrical properties of the hybrid composites were investigated.

TL;DR: In this paper, the electrical properties of nano-cellular polypropylene/multiwalled carbon nanotube (MWCNT) composites with relative densities ( ρ R ) of 1.0-0.1, cell sizes of 70nm-70μm, and cell densities of 3.0 −10 7 −2 −2 -10 14 cells −3 are reported.

TL;DR: A series of nitrogen-doped porous carbons are prepared through KOH activation of a nonporous nitrogen-enriched carbon which is synthesized by pyrolysis of the polymerized ethylenediamine and carbon tetrachloride as discussed by the authors.

TL;DR: In this paper, a green approach for synthesis of graphene-carbon nanotube aerogels with three dimensional (3D) interconnected networks prepared from natural graphite rocks was reported. And the proposed synthetic method is simple and economical for the scalable production of highly porous 3D graphene and carbon nanotubes aerogel, which can be successfully used for efficient and cost-effective oil spill clean-up and water purification.

TL;DR: In this paper, the application and tribological properties of graphene oxide (GO) monolayer sheets as additives in water-based lubricants were investigated and applied to a sintered tungsten carbide ball and stainless steel flat plate.

TL;DR: In this article, the possibility of using multi-layer graphene (MLG) particles as reinforcement for enhancing the mechanical properties of Cu matrix composites was explored, and the combination of ball milling and high-ratio differential speed rolling (HRDSR) techniques was utilized to fabricate the 0.5 and 1.1% MLG/Cu composites.

TL;DR: In this paper, the fundamental mechanisms of the synthesis of graphene from various transition metals under various circumstances through a CVD process and concludes by addressing the challenges involved in large-scale graphene synthesis and the reuse of the catalysts.

TL;DR: In this paper, a nanocasting was used to develop epoxy/graphene composites (EGCs) as corrosion inhibitors with hydrophobic surfaces (HEGC), which increased the contact angle of water droplets on a sample surface to ∼82° (epoxy surface) to ∼127° (hydrophobic epoxy and EGC).

TL;DR: In this paper, a facile method to reuse waste frying oil for one-step synthesis of sulfur-doped carbon dots (S-C-dots) with the assistance of concentrated sulfuric acid was developed.

TL;DR: In this paper, a simple and rapid micropatterning method for conductive composites that relies on single-step contact transfer printing (sCTP) is presented, which is readily synthesized by dispersing conductive carbon black nanoparticles into a PDMS matrix and is easily patterned on insulative PDMS substrates with negligible dimensional errors.

TL;DR: In this article, a one-step microwave assisted polyol method was developed to fabricate green luminescent carbon dots (CDs) by using sucrose as the carbon source and diethylene glycol as the reaction medium.

TL;DR: In this article, 1-, 2-and 4-layer graphitic carbon nitride (g-C3N4) nanosheets were synthesized in a well-crystallized form by controlling the intercalation time in a simple inter-calation-exfoliation process.

TL;DR: In this paper, reduced graphene oxide (rGO) reinforced hydroxyapatite nano-tube (nHA) composites were synthesized in situ using a simple hydrothermal method in a mixed solvent system of ethylene glycol (EG), N, N-dimethylformamide (DMF) and water, without using any of the typical reducing agents.

TL;DR: In this paper, the photocatalytic activity of carbon quantum dots and TiO2 nanosheet (TNS) composites was investigated by degradation of rhodamine B under visible light irradiation.

TL;DR: In this paper, a new method for the synthesis of multilayered radar absorbing materials is analyzed by using carbon nanomaterials, and the dielectric characterization of the composite materials is performed in the frequency range 2-18 GHz.

TL;DR: In this paper, a highly ordered porous carbon (HOPC) was used as an effective electromagnetic absorber for microwave-absorbing materials, and the porous structure allowed HOPC to possess high surface area and establish effective three-dimensional conductive interconnections at very low filler loading, which is responsible for effective electrical loss in terms of dissipating the induced current in corresponding wax composites.

TL;DR: In this article, an inverse relationship between measurable porosity values and reversible capacity from sucrose-derived hard carbon as an anode for sodium-ion batteries was reported, showing that materials with low measureable pore volumes and surface areas obtained through N2 sorption yield higher reversible capacities.

TL;DR: Graphene oxide (GO) was firstly employed as nanoscale reinforcement fillers in hydroxyapatite (HA) coatings by a cathodic electrophoretic deposition process, and GO/HA coatings were fabricated on pure Ti substrate as mentioned in this paper.

TL;DR: In this paper, the performance of nitrogen-doped few-layer graphene/multi-walled carbon nanotube (FLG/MWCNT) composite catalyst has been investigated.

TL;DR: In this paper, spherical activated carbons have been prepared through hydrothermal treatment of three carbohydrates (glucose, saccharose and cellulose) and have been analyzed to obtain spherical carbons with particle sizes larger than 10 lm.

TL;DR: In this paper, the effect of ternary-doped reduced graphene oxide (RGO) as an electrocatalyst was evaluated by employing thiourea as a single source of nitrogen (N) and sulfur (S), and triphenylphosphine for phosphorous (P) as precursors for heteroatom doping.

TL;DR: In this article, a novel porous carbon (PC) was prepared from hydrochar via pyrolysis at different temperatures (300-700°C), the characteristics of PC as well as tetracycline (TC) adsorption behavior were investigated.

TL;DR: S-doped microporous carbon materials were synthesized by the chemical activation of a reduced-graphene-oxide/poly-thiophene material as discussed by the authors, which showed a large CO 2 adsorption capacity of 4.5mmolg −1 at 298 K and 1m, as well as an impressive CO 2 selectivity over N 2, CH 4 and H 2.

TL;DR: In this article, a simple molecular approach to control the lipophilic/hydrophilic nature of photoluminescent carbon dots (CDs) based on pyrolysis of alkyl gallate precursors is presented.