Multi-walled carbon nanotubes (MWCNTs) are familiar well owing to their capability of finding wide-reaching applications based on their fascinating properties. Kinetics of thermally activated processes in MWCNTs can help in understanding and controlling those processes which might eventually lead to develop materials with optimized efficiencies. Even though, inadequate information on the kinetics of

In this investigation, time-dependent carbon nanostructures were prepared by high-energy ball milling in the air from elemental graphite powders. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy (RS), and high-resolution transmission electron microscopy (HRTEM) characterized the ball-milled powders. XRD analysis showed that the crystal size decreased with the milling

In this paper, the phase transformation mechanism of various carbon sources in the synthesis of diamond by direct detonation method was studied. Through designing comparison experiment and the X-ray diffraction (XRD) characterization technique, an experimental study was conducted on the detonation process with the external of the combined carbon source and free carbon source, and without the participation

Graphene device electronic properties with double vacancy (DV) defects for two cases, along the direction and perpendicular to the current pathways graphene device, were investigated by using the first principles calculations in combination with density functional theory. The bond lengths, density of states, transmission probability, and current-voltage curves are computed. For relaxed pristine graphene

Ru-Co/CNTs catalysts are prepared by microwave-assisted heating electroless plating using Carbon nanotubes as Carrier. The structure of the catalyst was analyzed by TEM, XRD, EDS and TGA, and the performance of the catalytic alcoholysis of sodium borohydride was tested. At 25 oC, the carbon nanotube diameter is 10-20 nm, the catalyst dosage is 20 mg, the sodium borohydride concentration is 5 wt.%,

(2020). Fullerenes C60 and C70: a model for solubility by applying the correlation intensity index. Fullerenes, Nanotubes and Carbon Nanostructures: Vol. 28, No. 11, pp. 900-906.

The present study introduces a process to grow micro-honeycomb (µ-HC) vertically aligned carbon nanotubes (VACNTs) using thermal chemical vapor deposition technique. Methane is used as a source of carbon and hydrogen gas as a reducing agent. Where, the fabricated µ-HC structure reported in literature involves complex synthesis process and requires a catalyst layer, the novelty of the process used here

Carbon nanotubes filled with iron oxides can be a promising material for medicine. In this paper, carbon nanotubes containing iron oxides were synthesized by chemical vapor deposition method. Cubic and tetragonal modifications of maghemite Fe2O3 were found inside the nanotubes along with α- and γ-phases of iron and iron carbides by electron microscopy studies. Twins were identified in the tetragonal

An alternative way to produce Graphene Quantum Dots (GQDs) economically is proposed in this study where corn powder was used as a green precursor to fabricate GQDs in a hassle less one-step route. These GQDs showed a stable, size-dependent in aqueous solution. The size of GQDs obtained from this work is approximately measure from 0.21 to 5.20 nm. The XRD patterns showed a broad peak at 22 Å. Furthermore

In this study, stability, density, rheology, and thermal conductivity of the Multi-wall carbon nanotubes (MWCNTs) based PCM nanocomposites were experimentally investigated. The PCM OM08 has been selected for the air-conditioning application with a phase change temperature of 8–10 °C. PCM nanocomposites (without surfactant) in various concentrations namely 0.05, 0.1, 0.3 and 0.5 vol. % were prepared

In this study, a novel ternary system form-stable phase change material (FSPCM) composed of lauric acid (LA)/raw fly ash (RFA)/carbon nanotubes (CNT) was prepared via low cost, easy and industrially applicable fabrication process for low-temperature heat storage. Particularly, the unmodified RFA was directly acted as supporting material to prevent the leakage of the melted LA almost at no cost. A series

Polyaniline/Bismuth Vanadate/Graphene Oxide (PANI-BiVO4-GO) or BGPA composite was prepared by sonochemical deposition of bismuth vanadate-graphene oxide (BiVO4) nanoparticles on the surface of polyaniline (PANI). The best photocatalytic degradation performance was obtained by 5wt% BGPA composites for MB, RhB, and SO dyes, which is approximately 4 times higher than that of 1% BGPA. Meanwhile, the photocatalytic

In the present study, lanthanum modified carbon nanotubes (La-CNTs) were prepared by the impregnation method and used as adsorbents to remove oxytetracycline (OTC) from aquaculture wastewater. La-CNTs were characterized by SEM, EDS, XRD, BET analysis. The effects of adsorbent dosage, concentration of OTC, adsorption time, pH and interfering ions on the adsorption of OTC by La-CNTs were investigated

Combinatorial techniques based on Sheehan’s modification of Pόlya’s theorem and Mȍbius inversion technique together with character cycle indices are applied to face colorings of giant fullerenes. These techniques are applied to icosahedral fullerenes, C80 with a chamfered dodecahedron structure, a chiral fullerene C140, icosahedral C180 and C240 with a chamfered truncated icosahedron geometry. The

Oak wood samples were converted into activated carbons via chemical activation with KOH. The effects of KOH concentration and temperature on the yields and characteristics of the activated carbons were investigated; the yield of the activated carbons decreased with increased temperature and impregnation ratio. The lowest yield of activated carbon was obtained at the highest temperature (800 °C), with

This study examined the pore development of carbon black according to burn-off (BO) ratio of carbon black activated in CO2atmosphere. A horizontal tube furnace was charged with carbon black when the internal temperature reached 1000 °C, and activation time was adjusted to obtain BO ratios of 7.2%, 15.4%, 30.4%, 48.2%, 59.9%, and 83.2%. SEM observations showed that the primary particles of carbon black

A novel approach for synthesizing carbon nanotubes (CNTs) via chemical vapor deposition (CVD) technique has been elucidated. CNTs are catalytically grown on the CoFe2O4-MgO nano-catalyst at various growth temperatures (700 °C, 800 °C, 900 °C) to clarify the effect of temperature and to achieve the optimum CNT growth temperature. The structural properties of the catalyst and CNTs were studied with thermal

Carbon micro/nanostructures have advantages in science, technology and application. This work introduced a simple process for producing carbon microfibers, CMF. Experimentally, the alkali lignin was blended with the poly(butylene terephthalate), PBT, to form the blending fiber by the melt spinning, then this blending fiber was thermally treated to convert into the CMF. Results shown that the carbonization

In this work, we implemented density function theory to investigate the structural and the electronic properties of nitrogen doped single walled carbon nanotube under different orientations of Stone Wales defect. We have found that, the doped defected structures are more stable than the non-doped defected structures. Furthermore, doping defected carbon nanotubes with a nitrogen atom has significantly

Carbon materials were prepared by plasma chemical vapor deposition at different pressures without catalyst, and the structure and hydrogen storage characteristics of milled and unmilled samples of the materials were evaluated. Using this approach, we were able to fabricate graphite microcrystals with a crystallite size of several nanometers, and the crystallite size and surface area could be controlled

The use of non-thermal plasma at atmospheric pressure has emerged as a technique for the substrate-free, gas-phase synthesis of graphene nanoflakes (GNFs). In this paper, a non-thermal plasma based on magnetically stabilized gliding arc discharge (MSGAD) was employed to prepare GNFs. The effects of the carbon-containing precursor, plasma gas, and arc current on the GNFs synthesis were investigated

In the case of sp2 amorphous carbons, formed by nanoscale graphene domains framed by heteroatom necklaces (basic structure units in total), inelastic neutron scattering and photoabsorption ensure studying vibrational spectra of the latter mainly. Examination of a set of samples of the highest carbonization rank representing natural substances (shungite carbon, anthraxolite, and anthracite), technical

The surface properties of carbon materials are very important since many complex physical and chemical reactions take place on their surfaces. X-ray photoelectron spectroscopy (XPS) test is one of the most significant characterization methods to analyze the surfaces. The carbon species and banding energies for several typical kinds of carbon materials (graphite, carbon black, graphene, carbon nanotubes

The present work describes the economical two-stages catalytic CVD method of the nanocomposite of phosphorous-doped multi-walled carbon nanotubes with nickel (Ni/P-MWCNTs) from the solution of the triphenylphosphine in ethanol using Ni/CaO catalyst. The structure of Ni/P-MWCNTs nanocomposite was studied by high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM)

Multi-walled carbon nanotubes (MWNTs) were prepared by pyrolysis of cheap natural gas over Ni/La2O3-MgO catalyst at 740 °C. The purified MWNTs were easily dispersed by ball milling method and aqueous dispersion with 10 wt% MWNT concentration was obtained. MWNT aqueous dispersion was mixed with waterborne polyurethane to prepare MWNT-polyurethane composite films containing 20–60 wt% MWNTs on PET substrate

RP-3 kerosene fuel is the dominant hydrocarbon fuel used in civilian airplanes in China. Lately, many administration and universal organizations imposed a stringent standard for civilian airplanes pollutants emission. The amount of pollutants emission can be affected by the introduction of a variety of additives into flames, such as inert diluents, gaseous additives. This paper reports the effects

The novel high hydrophobic graphene/vinyl-functionalized SiO2 composites were prepared via self-assembly of graphene sheets on the surface of vinyl-functionalized silica (VF-SiO2) nanoparticles. The resulting graphene/functionalized SiO2 composites exhibited rapid absorption rate, high absorption capacity and convenient separation in oil-water separation. Furthermore, the composites could be easily

The virgin CBp produced from scrap truck tires pyrolysis was analyzed both under N2 and under air flow with thermogravimetric analysis coupled with differential thermal analysis (TGA-DTA). Complementary information was derived from the two analysis. The rubber pyrolytic residues present on virgin CBp are better determined quantitatively by TGA-DTA under N2 flow. On the other hand, for the quantification

The effect of single-walled carbon nanotubes (SWCNTs) on the dielectric, conductivity, and electro-optic properties of nematic liquid crystal 4-cyano-4'-pentylbiphenyl (5CB) has been studied. It was shown that the additive of SWCNTs with concentration of 0.5% leads to an increase in the order parameter of 5CB. In this case, the clearing point is raised, the longitudinal component of the dielectric

Nanoscale metal oxides based binder-free electrodes have application prospects in the energy storage field. In this work, Fe2O3 nanosheets composited with carbon matrix were prepared via the electrochemical deposition on the dopamine treated stainless steel substrate, followed by annealing treatment. The electrode delivers discharge capacity of 1242 mAh·g−1 at 600 mA·g−1 current density after 100 cycles

Composites comprising platinum nanoparticles loaded on [C60]fullerene nanowhiskers were prepared by a liquid-liquid interfacial precipitation method. The synthesized platinum nanoparticle-[C60]fullerene nanowhisker composites were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. The catalytic activity of the platinum nanopa

A novel tert-butyl hydroperoxide tetrasubstituted cobalt phthalocyanine (CoPc(OC10H14N)4) was synthesized by the classical phthalonitrile method. Subsequently, the cobalt phthalocyanine (CoPc) was immobilized on the multi-walled carbon nanotubes (MWCNTs) by ultrasonic impregnation method to obtain CoPc(OC10H14N)4/MWCNTs composites. The obtained composites were characterized by Fourier transform infrared

Ru-Fe bimetallic alloy nanoparticle catalyst (Ru-Fe/GO) was prepared by chemical reduction method on graphene oxide prepared using Hummers modified method. The structure and morphology of both GO and Ru-Fe/GO were analyzed using X-ray diffraction (XRD), Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron

In this study, hazelnut shell and walnut shell which are the agricultural wastes existent abundantly in many countries were pyrolyzed at different temperatures in the temperature range of 400–700 °C in order to optimize the physicochemical properties of biochars. The biochars with large surface area were used to removal of lead (Pb2+) ions, one of the most important heavy metal pollutant, from aqueous

Multiwalled carbon nanotubes were functionalized by polyvinyl alcohol in order to synthesize potential additive for concrete to improve mechanical properties. The obtained nanostructure was characterized structurally and surface morphologically by various techniques. These techniques revealed the success of the functionalization process in preparation of the strengthening additive. The mechanical characterization