Abstract Concern on dyes-laden effluent has intensified over the years. Dyes are toxic, stable to light hardly bio-degraded and cause irreparable harm to living organisms. Adsorption is widely recognized as an effective way to remove colorants from wastewater. Nevertheless, the search for improving the efficiency of adsorption is constantly being carried out with the help of new cheap activated carbon

Abstract Physisorption of Benzaldoxime derivatives on the Fullerene has been assayed at the M06/6-311++G (d, p) level of theory. The Anti-isomers are more stable than Syn-geometries in the range of –1.8 to –5.6 kcal mol–1. Global reactivity descriptors showed that donor and acceptor functional groups increase and decrease reactivity of the BO compound as electrophile, specially –NH2 and –NO2 groups

Abstract Nitrogen doped graphene quantum dots (N-GQDs) have attracted much attention because of their superior electronic and optical properties. The preparation of N-GQDs can be usually performed via a top-down method using vairous nanocarbon as raw materials. However, most carbon materials are powder, which increases the difficulty of separating quantum dots from the reaction solution. Herein, we

Abstract Conformational transformations of unsubstituted 1,3-dioxane in the cavities of fullerenes with 60, 70 and 80 atoms in their shells have been investigated using PBE/3ζ density functional theory method. It was shown that the preferred conformation of the guest molecule in endoclasters with 60 atoms (С60, С12B24N24, B36N24) corresponds to the 1,4-twist form, not to the expected chair. In case

Abstract The adsorptions of hydrogen on Li-decorated nitrogen-substituted graphyne are investigated by density functional theory. The substitutional doping of nitrogen atoms can change the electronic structure of graphyne, which is beneficial to the adsorption of Li atoms. The results show that isolate Li atom is preferred to locate hollow site above the center of the acetylenic ring with binding energies

Abstract Efficient synthesis of large-scale vertically aligned nitrogen-doped carbon nanotube arrays (VA-NCNTs) has always been a challenge. In this study, we proposed a facile way to obtain mass VA-NCNTs between vermiculite layers by horizonal chemical vapor deposition (CVD). Vermiculite with layered compound as the catalyst substrate, Fe and Mo as the active metal phase is evenly distributed between

Abstract Acne vulgaris is a chronic skin disease of the pilosebaceous unit. Several pathophysiological associations have been identified in which Propionibacterium acnes plays a major role. Although there are a number of antibiotic therapies suggested for acne, many of them have limitations in their safety and efficacy. Therefore, there is a high demand to develop a safe alternative therapy for acne

Abstract The TiO2@C nanocomposite can be called a multifunctional material due to its unique physical and chemical properties. In the first part of the current study, the most widespread methods for producing TiO2@C nanocomposites were presented. They were divided into electrophysical and chemical methods. Chemical methods included the sol-gel method, the solvothermal and hydrothermal methods, the

Abstract In recent years, color removal processes from industrial wastewater which contains dyestuffs have gained great importance. Especially, textile industry wastewater with high volume and variable composition comes first among these wastewaters. These waters bring along many ecological and esthetic problems. In this study, unmodified and acid/base-modified wood charcoal derived from oak wood has

Electrochemical exfoliation method, which is one of the methods of producing graphene, is a suitable technique for the mass production of graphene in the industrial sense. However, the correct selection of electrochemical process inputs (electrolyte, applied voltage, etc.) is very important for graphene formation. Otherwise, thick fragmented graphites are formed. In this study, a method for producing

Due to the lack of comprehensive understanding of the formation mechanism, the preparation of carbon onions by arc discharge is still an uncontrollable process, which restrains their massive and stable production. Taking advantage of the transient nature of the arc discharge, we successfully captured the nanoparticle morphology in each growing stage during the carbon onion formation process in a large

Relative populations of eight low-potential-energy IPR (isolated-pentagon-rule) isomers of Eu@C84 are computed using the Gibbs energy based on the B2PLYPD/SDD potential energy. The calculations agree with the recent observation that the major isomer is Eu@C 2(13)-C84 and the minor isomer is Eu@C 2(11)-C84. There are also other two minor isomers suggested by the calculations. Insufficient solubility

Removal of oil from water through absorbent materials such as graphene proves to be an excellent technique due to its simplicity and recoverability. However, there are several issues encountered such as poor structural integrity and complexity of the fabrication process. In this study, the hollow three-dimensional graphene (H3DG) grown using chemical vapor deposition technique is strengthened by infusing

Chitosan (Chit) cross-linked via glutaraldehyde to graphene oxide (GO) was prepared as the basic nanocomposite support for further modification. The Chit/GO nanocomposite was modified with carbon nanotubes (CNT) and/or magnetite (Fe3O4), to separate the GO sheets even further and/or to render the nanocomposite magnetic. Palladium nanoparticles (Pd NPs) was embedded into the matrix of the nanocomposite

Fullerenes are cubic polyhedral molecules made of carbon atoms. They have attracted much attention in the chemical and the mathematical literature. In the present paper, we compare the orbit and Hosoya entropies with the total energy of some classes of fullerenes to determine a correlation between these measures. Besides, we investigate the correlation between eigenvalues-based entropy and the total-energy

DSC and calorimetric studies of multi-walled carbon nanotubes (MWCNTs) with average diameters in the range 7, 9 and 18 nm were carried out. MWCNTs were obtained by the CVD method. The kinetic processes in MWCNTs were studied from room temperature to 550 °C in a nitrogen flow using differential scanning calorimetry (DSC) on a Perkin – Elmer — 8000. It was found that exo- and endothermic peaks are not

Four types of film forming materials were used in graphene fire resistive coatings to investigate the fire protection, smoke suppression, water resistance and physical properties by corresponding tests. Firstly, weather resistance of emulsions was tested and evaluated. Additionally, distribution state of graphene in the emulsion was conducted by precipitation method test, particle size distribution

Exploring alternative Pt-free counter electrode with low cost and high electrocatalytic activity is always a main focus at the frontier of dye-sensitized solar cells (DSSCs). In this study, a desktop laser engraver was applied to reduce graphene oxide (GO) film on a fluorine-doped tin oxide (FTO) substrate, and the obtained graphene-based material was further used as counter electrode for DSSC. Additionally

The influence of 3-(triethoxy silyl) propyl amine (TESPA) concentration on Multi Wall Carbon Nanotubes (MWCNTs) modification, is experimentally investigated. The MWCNTs modification were performed by 150, 75 and 25 weight percent (wt.%) of TESPA with respect to MWCNTs weight and the properties of the prepared samples were compared with each other and pristine MWCNTs. The MWCNTs silylation has been

C70 cycloadducts with sulfur–fullerene bond were previously unknown. We discovered that the sonochemical reaction of C70 with 1,2-hydroxythiols selectively produces the single 5,6-isomer of C70–1,4-oxathiane. The C70 •– radical anion was detected with EPR as a key intermediate of the reaction.

Two-mode valence electron configuration of carbon atoms lays the foundation of the unique two-mode amorphous state of the carbon solid. From the fundamentals of solid-state physics, sp3 and sp2 amorphous carbons are two different species characterized by conceptually different short-range orders, namely, groups of tetrahedrally bonded sp3 configured atoms and nanoscale size-restricted sp2 graphene

In this paper, nanoscale mechanical properties and failure behavior of graphene with Stone-Wales defect concentration were investigated using molecular dynamics simulations with the latest ReaxFFC-2013 potential that can accurately capture bond breakages of graphitic compounds. The choice of interatomic potential plays an essential role in capturing the deformation mechanism accurately. Stable configuration

This manuscript is devoted to the study of the influence of the type of ions hydration on photoluminescence (PHL) of carbon dots (CDs) in aqueous suspensions. It is shown that ions with different hydration properties affect differently on CDs PHL. Positively hydrated cations increase the intensity of CDs PHL, and negatively hydrated cations weaken CDs PHL. The effect of the anions hydration type on

We studied the effect of covalent functionalization of graphene oxide (GO) and nanodiamond (ND) with octadecylamine (ODA) on bacterial growth (a series of experiments was performed also with pristine single-walled carbon nanotubes [SWNTs] for comparison). The bacteria tested were Escherichia coli and Staphylococcus aureus, which represent Gram-positive and Gram-negative types, respectively, and are

Aluminum-ion batteries are favorable for the next generation of rechargeable batteries by virtue of their high theoretical energy density, high safety and low cost. Graphite with excellent electronic conductivity and large surface area is likely to be the most pleasurable cathode material for aluminum-ion batteries. However, due to the lack of high-performance cathodes and cost-effective electrolytes

Carbon nanotubes (CNTs) are attracting great interest in enhancing rheological behavior and thermal performance of lubricating grease. In this study, CNTs were synthesized by catalytic chemical vapor deposition (CCVD) method using low-density polyethylene (LDPE) waste as a cheap carbon source and Co/MgO as an effective catalyst. The effect of temperature on the catalytic pyrolysis of LDPE to produce

Aluminum-ion batteries, as a feasible substitute for lithium-ion batteries, have the advantages of high safety, high capacity, low cost and environmental friendliness. However, the cathode material is one of the key factors restricting the performance and practical application of aluminum-ion batteries. Sulfur is becoming a promising cathode material for aluminum-ion batteries due to its considerable

With the help of pyrolysis gas chromatography–mass spectrometry (Py-GC-MS), high resolution thermogravimetric instrument and CHONS elemental analyzer, the pyrolysis products of refuse-derived fuel (RDF) in different months in one year are studied in this article. And the three kinds of RDF are denoted as A, B and C, respectively. High resolution thermogravimetric tests showed that obvious chemical

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

Abstract 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)

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

Abstract 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)

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

Abstract 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

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