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While approaches have been successfully devised to optimize the power factor of inorganic thermoelectric (TE) materials, the understanding and control of TE performance of organic composite materials are however still rudimentary due to their complicated structures and weak interfacial interactions. We report a facial method to tailor the interfacial interaction of amine-functionalized carbon nanotubes...
Nanocarbons like graphene, carbon nanotubes, and expanded graphite feature different morphology and surface functional groups. They are thus expected to have different properties and applications. Herein, electrochemical properties of several nanocarbons including graphene nano platelets (GNPs), multi-walled carbon nanotubes (MWCNTs), graphene oxide (GO), aminated graphene (NH2-G), expanded graphite...
A large scale 3D interconnected hierarchical porous carbon monolith was developed by a novel synthetic approach from the 2nd most abundant natural polymer, lignin. This newly derived carbon monolith possess desirable microstructure and high conductivity that enables the fabrication of a binder-/conductive additive-free thick electrode. The carbon monolith delivered simultaneously excellent areal/volumetric...
In this paper, nanoscale zero-valent iron (NZVI) immobilized on carbon nanotube (CNT) composite (NZVI/CNT) was prepared, characterized and used for the sequestration of Se(IV) in water. The structural analysis revealed that NZVI were uniformly immobilized on CNT surfaces, and thus the oxidation and aggregation of NZVI was obviously minimized. Compared to bare NZVI, the NZVI/CNT exhibited much higher...
This work reports the fabrication and characterization of three-dimensional (3D) graphene aerogel (GA)–polydimethylsiloxane (PDMS) composites (GAPC) with outstanding mechanical, electrical and thermal properties. GAPC was fabricated by impregnating 3D GA frameworks with PDMS via ice-bath-assisted infiltration and vacuum curing processes. Because of the well-interconnected 3D GA frameworks, GAPC exhibits...
A porous tin peroxide/carbon (SnO2/C) composite electrode coated with an amorphous carbon layer is prepared using a facile method. In this electrode, spherical graphite particles act as supporter of electrode framework, and the interspace among particles is filled with porous amorphous carbon derived from decomposition of polyvinylidene fluoride and polyacrylonitrile. SnO2 nanoparticles are uniformly...
Coaxial heterogeneous graphene quantum dot-sensitized TiO2 nanotube arrays (GQDs/TNTs) are prepared by a coupling technique of linker molecule binding and electrophoretic deposition (EPD). The silane linker molecules act as a superb medium for integrating GQDs and TNTs by covalent amide linkage, thus preventing GQDs from clogging the tube entrances and forming a uniform GQD layer tightly attached...
Vertically and neatly arranged crystalline graphitic C3N4 (g-C3N4) nanocone arrays were firstly synthesized on nickel-covered silicon (100) substrates supported on a graphite frame. Synthesis was accomplished using an abnormal glow discharge plasma sputtering reaction deposition method with a feed gas mixture of CH4, N2 and H2. The experimental results show that the morphologies, structures, composition...
Carboxylated multi-wall carbon nanotube (c-MWCNT)–Fe 3 O 4 magnetic hybrids (c-MWCNTMHs) were prepared by mixing FeCl 3 ·6H 2 O, sodium acetate, ethylene glycol and diethylene glycol with c-MWCNTs, followed by sonicating and heat treatment at 200°C for 10h. Results indicated that the c-MWCNTMHs showed a good dispersion stability, an acid and alkali resistivity, and...
The propagation of dynamic ripples induced by a C60 molecule is observed in pristine and defective graphene by molecular dynamics simulations. The ripples centered in the impact point propagate outward through the graphene, accompanied by a strain energy transfer. The noticeable diffraction and interference of the dynamic ripples are also observed. The Stone–Wales (SW) defect or vacancies greatly...
The interaction between a graphene nanosheet (GNS) and an iron (Fe) nanowire (NW) was studied by molecular dynamics simulations. The Fe NW activates the GNS to spontaneously scroll round it, resulting in a stable core–shell nanostructure. The interaction between the GNS and Fe NW as well as the π–π stacking interaction between GNS layers may be responsible for this unique behavior. A thermodynamic...
Single-walled carbon nanotubes (SWCNTs) show a new facet of their extremely diversified reactivity through the possibility of becoming spontaneously efficiently functionalized in the presence of gaseous fluorine at room temperature, in sharp contrast with any other carbon allotrope. The synthesis route employed here optimizes the formation of an unusual weak bonding mode of fluorine to such a carbon...
Carbon nanofibers (CNFs) have been synthesized by co-catalyst deoxidization process by a reaction between C 2 H 5 OC 2 H 5 , Zn and Fe powder at 650°C for 10h. These nanofibers exhibit diameters of ∼80nm and lengths ranging from several micrometers to tens of micrometers. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy indicate...
The individual and competitive adsorption capacities of Pb 2+ , Cu 2+ and Cd 2+ by nitric acid treated multiwalled carbon nanotubes (CNTs) were studied. The maximum sorption capacities calculated by applying the Langmuir equation to single ion adsorption isotherms were 97.08 mg/g for Pb 2+ , 24.49 mg/g for Cu 2+ and 10.86 mg/g for Cd...
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