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Herein, a novel graphite-graphite dual ion battery (GGDIB) based on N-butyl-N-methyl-piperidinium bis(trifluoromethyl sulfonyl)imide (PP14NTF2) ionic liquid room temperature ionic liquid electrolyte, using conductive graphite paper as cathode and anode material is developed. The working principle of the GGDIB is investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy...
How graphene oxide (GO) derivatives might affect the cell cycle has been rarely studied. Herein, a GO derivative was fabricated by functionalization of GO with polyethylene glycol (PEG) and polyethylenimine (PEI), and its cytotoxic mechanism was investigated in-depth. It was found that our obtained GO-PEG-PEI nanosheets, not the cytotoxic coating polymer PEI, could induce defect in S phase of the...
Hollow carbon nanospheres have received much interest by virtue of the special shape, low density and large interior void space, allowing their many potential applications. Here we report a template-free route to produce nitrogen-doped hollow porous carbon spheres (denoted as N-HPCSs) through amination reaction of C60 with alkyl diamines and subsequent carbonization. The size of wall thickness and...
A ternary composite of graphene oxide/carbon dots/polypyrrole (GO/CDs/PPy) used as electrode active material for supercapacitor has been synthesized via in situ polymerization of GO/CDs with pyrrole under a mild condition. The CDs sandwiched between GO film and PPy layer can promote electron transportation in the ternary composite and thus reduce the internal resistance and charge transfer resistance...
We herein report the synthesis of heteroatoms doped, high surface area microporous activated carbons (AC) by utilisation of Coca Cola® as a potential source of waste biomass, for applications as CO2 adsorbent and electrodes of supercapacitors. N, S dual doped carbon spheres are firstly obtained by hydrothermal treatment of Coca Cola® and then thermally activated by either KOH or ZnCl2. The resulting...
Human mesenchymal stem cells (hMSCs) hold great promise for bone regeneration, yet the direction of MSC proliferation and induction of MSC differentiation remain challenging. Very recently, graphene provides a novel substrate for cell culture. Here, we report the utilization of mineralized three dimensional graphene (3DG) scaffolds for hMSC growth. The nano-structured hydroxyapatite (HA) particles...
Zirconium Oxide (ZrO 2 ) was deposited on graphene nanosheets (GNS) by atomic layer deposition (ALD) using tetrakis(dimethylamido)zirconium(IV) and water as precursors. The results indicated that both morphology and crystallinity of the deposited ZrO 2 were controllable in a temperature range of 150–250°C. At all the temperatures studied, ZrO 2 nanoparticles were formed with...
Phosphorus–nitrogen doped multiwalled carbon nanotubes (CN x P y ) were prepared using a floating catalyst chemical vapor deposition method. Triphenylphosphine (TPP), as phosphorus (P) precursor, was used to control the structure of the CN x P y . Transmission electron microscope (TEM) observation indicated that with the increase of TPP amount, the outer diameter and...
Henry’s law constants and isosteric heats of adsorption at zero loading are calculated for several gases adsorbed on multi-wall carbon surfaces for slit-shaped, cylindrical, and spherical geometries. The Henry’s law constant is found to be sensitive to the pore width, surface mean curvature, and number of layers of wall. We examine the importance of multiple layer walls on the heat of adsorption....
The isosteric heat of adsorption in the Henry’s law region is calculated as a function of the pore width for carbon single wall cylindrical nanopores and spherical nanocavities. The maximum isosteric heat of adsorption is obtained for six gas molecules: argon, methane, carbon dioxide, hydrogen, helium, and nitrogen. In addition, the results for cylindrical carbon nanopores are compared with adsorption...
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