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In spite of graphene and Ti 3 C 2 MXene sheets with various significant properties and function, the performance characteristics of their hybrid in organic coating have been rarely discussed. Herein, the Ti 3 C 2 /graphene hybrid (M-G) with wrapping structure was successfully prepared and as filler was added into epoxy coating (MG-EP). Their tribological performance against Al 2 O 3 and Si 3 N 4...
Carbon dots, as one of carbon-based nanomaterials, with excellent fluorescent properties and low toxicity show great potential in bio-science and bio-technology. Here, we grew mung bean sprouts with different concentration of carbon dots (CDs) and studied the plant growth and photosynthesis. We found CDs show a dose-response effect on the growth of mung bean sprouts, including root elongation, stem...
Applying bio-imaging in bacterial viability assessment is vital to human health. Nitrogen, phosphorus co-doped carbon dots (NPCDs) with high visible fluorescence and tunable negative charges were synthesized by a feasible hydrothermal reaction. The as-prepared NPCDs possess abundant surface functional groups, excellent photostability and bio-compatibility. Especially, the surface negative charges...
N-doped carbon dots (NCDs) obtained by one-step reflux treatment of C3N4 with ethane diamine possess good water dispersibility, strong visible fluorescence, low toxicity, proton adsorption capacity, and photo-induced electron-accepting/donating abilities. Based on these unique properties, we demonstrate that the obtained NCDs can be used as a good fluorescent probe for cellar imaging without any further...
Although the simultaneous presence of multiple pollutants is common, the behaviors of the pollutants as affected by other chemicals are still unclear. Graphite (GP) and graphene oxide were applied as model adsorbents to study the coadsorption of sulfamethoxazole (SMX) and carbamazepine (CBZ). For the first time, desorption hysteresis and thermodynamic analysis were incorporated in studying the coadsorption...
An easy bottom–up method for the preparation of photoluminescent (PL) graphene quantum dots (GQDs) and graphene oxide (GO) has been developed by tuning the carbonization degree of citric acid and dispersing the carbonized products into alkaline solutions. The GQDs are nanosheets ∼15nm in width, and 0.5–2.0nm in thickness. They show a relatively strong (9.0%) PL quantum yield and an excitation-independent...
Polyamine-functionalized carbon quantum dots (CQDs) with high fluorescence quantum yield (42.5%) have been synthesized by the low temperature (<200°C) carbonization of citric acid with branched polyethylenimine (BPEI) in one simple step. The obtained BPEI–CQDs are spherical graphite nanocrystals (average 6.2nm in size) capped with abundant BPEI at their surfaces. It is the first report that CQDs...
The hybrid structures of carbon nanotubes (CNTs) and alumina microparticles were produced in a horizontal chemical vapor deposition (CVD) reactor using ferrocene/xylene/acetylene mixture as the catalyst–carbon source. At a given temperature and hydrogen ratio, the CNT diameter, number density, growth rate and their hybrid structures varied greatly along the axial direction of the reactor. This non-uniform...
Multi-walled carbon nanotubes (MWCNTs) of uniform diameter grow in six orthogonal directions on micrometer spherical alumina particles by chemical vapor deposition. A mixture of xylene and acetylene is used as the carbon source for the growth of CNTs. Detailed investigation shows that the MWCNT arrangement is greatly dependent on the geometry, size and crystallography of the alumina microparticles...
Carbon nanotubes (CNTs) are synthesized by catalytic chemical vapor deposition (CCVD) from xylene, acetylene and their mixture. The addition of acetylene significantly increases the decomposition rate of xylene and decreases the benzene concentration in the effluent gas, as well as improving the quality of the CNTs obtained. There is a strong interaction between acetylene and xylene during the CCVD...
A Ru-containing ordered mesoporous carbon with a high specific surface area of 2186m 2 /g was synthesized through evaporation-induced multi-constituent co-assembly method, wherein soluble resol polymer is used as the carbon precursor, silicate oligomers as the inorganic precursor, triblock copolymer as the template, and RuCl 3 ·3H 2 O as the Ru precursor. The resultant sample...
Four high-aspect-ratio carbon nanomaterials were fabricated by template-directed liquid crystal assembly and covalent capture. By selecting from two different liquid crystal precursors (thermotropic AR mesophase, and lyotropic indanthrone disulfonate) and two different nanochannel template wall materials (alumina and pyrolytic carbon) both the shape of the nanocarbon and the graphene layer arrangement...
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