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Graphite and multi-walled carbon nanotubes (MWCNTs) irradiated by gamma-rays were studied by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. The results show that gamma-irradiation improves the degree of structural order in graphite and an irradiation dose of 200kGy is the most effective. However, gamma-irradiation decreases the degree of graphitization of the nanotubes...
Nylon 6,6 composites containing nylon 6,6 grafted multi-walled carbon nanotubes (nylon 6,6-g-MWCNT) were fabricated from nylon 6,6 and acyl chloride grafted MWCNT (MWCNT–COCl) by reactive extrusion. MWCNT–COCl was produced by reacting acid-treated MWCNTs with thionyl chloride. Formation of nylon 6,6-g-MWCNT by reactive extrusion was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron...
The dielectric property of a composite system of poly(cyclohexyl methacrylate) grafted on multi-walled carbon nanotubes (PCHMA-CNT) and barium titanate (BT) powder was systematically characterized over the broad frequency range of 10 –2 –10 6 Hz. PCHMA-CNT served as a polymer matrix in the PCHMA-CNT/BT system. Because of the high dielectric constant ε r ’ and the quite low...
Although supercapacitors have higher power density than batteries, they are still limited by low energy density and low capacity retention. Here we report a high-performance supercapacitor electrode of manganese oxide/reduced graphene oxide nanocomposite coated on flexible carbon fiber paper (MnO 2 –rGO/CFP). MnO 2 –rGO nanocomposite was produced using a colloidal mixing of rGO nanosheets...
The Do and Do model for water adsorption isotherms of activated carbons has been refined, linking its parameters to the amount of surface oxygenated and nitrogenated complexes on the carbon. As these values can be determined independently, e.g. by X-ray photoelectron spectroscopy, it is possible to predict the water isotherm of an activated carbon or, vice versa, use the water vapour isotherm to characterise...
The adsorption capacity of 2-methylisoborneol (2-MIB) on activated carbon (AC) does not correlate with that of natural organic matter (NOM) because the adsorption property of each organic compound depends on the surface condition of AC such as pore size distribution, oxygen content and the type and number of surface functional groups. Here it was shown that the adsorption capacity of 2-MIB on AC did...
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