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Real-time intercalation of liquid 1-propanol within graphite oxide prepared by Brodie's method has been monitored by means of state-of-the-art neutron diffraction. We have developed a data analysis based on the paracrystalline theory which enables the characterization of stacking disorder in terms of the average number of layers contributing to Bragg scattering and the relative dispersion of the distribution...
Adsorption of small molecules, such as O2, H2, CO, NO, NH3, HCHO, and SO2, on a recently synthesized warped nanographene C80H30 is investigated in the framework of density functional theory (DFT). Except for O2, all these molecules are physically adsorbed on C80H30, typically with very small adsorption energies. However, SO2 adsorption has a relatively large adsorption energy accompanied with a notable...
The thermal transport properties of electrons in graphene nanoribbon (GNR) subjected to strain fields are studied by non-equilibrium Green's function approach. The results show that the stretching of the carbon–carbon bond in strained GNR can enhance the ballistic thermal conductance of electrons. The enhancement originates from that the change of C–C bond length can modulate the nearest-neighbour...
Four types of luminescent nitrogen-doped carbon dots (C-dots) are prepared by using glucose (G) or citric acid (C) as carbon source, and dopamine (D) or 4,7,10-trioxa-1,13-tridecanediamine (T) as nitrogen source, named GD-C-dots, GT-C-dots, CD-C-dots and CT-C-dots. The investigation on the optical, pH-sensitivity and photovoltaic properties of these C-dots illustrates that nitrogen source plays a...
An in-situ pyrolytic and polymerizable method was investigated to grow carbon nano-fibers/tubes (CNF/CNT) without metal-catalysts. The 3 mol % yttria-stabilized zirconia hollow fiber membranes (3YSZ-HFM) were used as supports for growing the CNF/CNT. The polyethersulfone (PES) and polyvinylpyrrolidone (PVP) were used as polymer binders and carbon sources. The as-grown CNF (formed at 1250 °C/4h) had...
Two different nanomaterial-based metallophthalocyanine catalysts were synthesized by immobilizing iron trinitrophthalocyanine with amino (FeMATNPc) covalently on multi-walled carbon nanotubes (MWCNTs) by deamination-synthesized MWCNTs-FeTNPc and on oxidized MWCNTs by amidation-synthesized MWCNTs–CONH–FeTNPc. The resulting hybrid structure was confirmed and characterized by X-ray photoelectron spectroscopy...
The optimum synthesis conditions for carbon nanotube (CNT) fibers were investigated using the Design of Experiment (DOE) technique. Direct spinning processes are governed by a variety of experimental factors: the methane flow rate, ferrocene flow rate, sulfur flow rate, hydrogen flow rate, water flow rate, and reaction temperature. The process was optimized in two stages that addressed first the Fractional...
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