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Aided by Oxone, water-dispersible graphene of 2–5 atomic layers was electrochemically fabricated from graphite in one step without any extra stabilizers or additives. Oxone as a novel electrolyte and the electrochemically enhanced oxidation were responsible for the excellent aqueous dispersibility, effective exfoliation and the reasonably high yield (up to 60.1%).
A light, 3-D, porous aerogel was fabricated by way of a simple approach from 1-D tungsten oxide nanowires and 2-D reduced graphene oxide sheets. The as-prepared graphene oxide, tungsten oxide nanowires, and tungsten oxide-reduced graphene oxide (W18O49-RGO) aerogel were characterised. The photocatalytic activities of as-prepared aerogel under visible light irradiation were investigated through the...
ZnO quantum dots (QDs) are anchored on multi-walled carbon nanotubes (MWCNTs) by a wet chemical self-assembling technique. The structure and properties of QDs/MWCNTs are also studied in detail. First, MWCNTs are functionalized with thiol by a series of chemical reactions. Fourier transform infrared spectroscopy is used to verify changes of chemical bonds on MWCNTs. At one time, quantum dots of ZnO...
Carbon onions with hydrophilic characteristics were synthesized through irradiating carbon black suspension using millisecond pulsed laser at room temperature. Laser energy absorption resulted in the structure transformation of carbon black and the formation of hydrophilic groups on the surface of carbon onion. Carbon onions with hollow cores and the incomplete graphitic shells were produced from...
Mesostructured polyaniline/single-wall carbon nanotube (PAni/SWCNT) composite film has been prepared through electrochemical polymerization/degradation processing. The microstructures of the films are observed before and after electro-degradation. Initial twisty SWCNT bundles are broken down and linked by the polymerization of PAni. Both crystalline and disordered PAni regions coexist in the PAni/SWCNT...
A multi-step procedure has been developed to cut and purify single-walled carbon nanotubes (SWCNTs) from the pristine soot synthesized by catalytic chemical vapor decomposition, which contains significant amount of multiwalled carbon nanotube (MWCNT) impurities. The procedure involves refluxing in dilute HNO 3 solution followed by (NH 4 ) 2 S 2 O 8 /H 2...
Fe 3 O 4 beads, with average diameters of ca. 180nm and narrow size distribution, were self-assembled along multiwalled carbon nanotube (MWCNT) and formed necklace-like nanostructures through a simple, effective and reproducible hydrothermal method. TEM, SEM, XRD and SAED were used to characterize the as-synthesized samples. Results indicate these Fe 3 O 4 beads were...
The surface properties of carbon nanotubes have been changed by heat treatment with ammonia to yield a basic surface or with N 2 to yield an acidic surface without destroying the integrity of the nanotubes. The dispersion state of CNTs could be much improved by the adsorption of a cationic dispersant of poly(ethylenimine) (PEI) or an ionic dispersant of sodium dodecyl sulfate (SDS). Through...
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