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Graphitized carbon nano-cages can be prepared by carbon dioxide and magnesium metal as precursors. The carbon materials can produce a large amount of functional groups by the oxidation of nitric acid. Compared with amorphous carbon, the oxidation treatment can improve capacitive performance of carbon nano-cages, especially rate performance. At high scan rate, specific capacitance of carbon nano-cages...
Hybrid graphene aerogels (HGA) consisting of graphene oxide (GO) and graphene nanoplatelets (GNP) were prepared and introduced into polyethylene glycol (PEG) via vacuum impregnation, aiming at obtaining composite phase change materials (PCMs) with high thermal conductivity, outstanding shape-stabilization, high energy storage density, commendable thermal repeatability and the ability to light-to-heat...
The design and preparation of high comprehensive performance composite phase change materials (PCMs) via a straightforward route were pioneered. Graphene oxide (GO) nanosheets were introduced as supporting materials to keep the shape of polyethylene glycol (PEG) stable during the phase change process and graphene nanoplatelets (GNP) were used as conductive fillers to improve the thermal conductivity...
Morphology-controllable carbon nanocoils (CNCs) are synthesized by thermal chemical vapor deposition using Ni nanoparticle as catalyst prepared by spray-coating method. It is found that, with the increase of number of spray-coating times, the helicity of CNCs increases whereas the average line diameter and coil pitch decrease. Additionally, infrequent Y-junction CNCs and plait-like CNCs are found...
In view of the fact that the catalytic activity of supported catalyst is greatly influenced by its impregnation method, an in situ hydrothermal deposition method was explored and applied to load iron catalyst onto the amorphous carbon matrix, which derived from a soft-templating method with sucrose as precursor, to prepare nanoporous graphitic carbon at low temperature. Compared to traditional impregnation...
The quasi-static and dynamic compressive properties of a ceramic fiber-reinforced carbon (CFRC) aerogel were investigated using a universal test machine and a split Hopkinson pressure bar. The fracture surface of the CFRC aerogel was studied by scanning electron microscopy. Results show that the compressive behavior of CFRC aerogel exhibits a significant strain rate strengthening effect. The quasi-static...
A composite of multi-walled carbon nanotubes (MWCNTs) and polypyrrole (Ppy) has been synthesized by vapor phase polymerization, and characterized by Fourier transformed infrared spectra, Raman spectra, thermal gravimetric analysis, X-ray diffraction study and scanning electron microscopy. Its gas sensitive characteristics towards NH 3 vapor were investigated at room temperature. It was found...
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