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Polydiacetylene (PDA) films are shown enabling the combination of graphene transfer and photodetector fabrication into one step. Under the assistance of PDA, centimeter pieces of graphene can be acquired with free of broken or fractures. The constructed PDA/graphene hybrid films demonstrate ultrahigh, gate-tunable responsivity (R) and detectivity (D*) from UV to visible wavelengths, for instance,...
A novel MnO2/g-C3N4 heterojunction composite was synthesized via a simple in-situ redox reaction between KMnO4 and MnSO4·H2O adsorbed on the surface of g-C3N4 for the first time. MnO2 featuring 2D δ-phase layered structure was intimately attached onto the surface of g-C3N4 layers via CO bonding. Notably, the synthesized MnO2/g-C3N4 photocatalyst showed substantially enhanced photocatalytic activity...
Incorporation of FeOx in graphitic carbon nitride (g-C3N4) usually resulted in limited improvements in the photocatalytic activity due to the possible reactions between iron and g-C3N4 during synthesis. Herein, using ferrocene and urea as the precursors of FeOx and graphitic carbon nitride, respectively, a new kind of FeOx modified g-C3N4 photocatalysts has been prepared by a facile one-step calcination...
Described herein is a facile one-pot strategy to synthesize N-doped graphitic carbon-incorporated g-C3N4 by adding slight amount of citric acid into urea as the precursor during thermal polymerization. The obtained materials retained the original framework of g-C3N4 and show remarkably enhanced visible light harvesting and promoted photo-excited charge carrier separation and transfer. The high-resolution...
Graphene is a promising candidate as transparent electrode owing to its high optical transmittance and conductivity. Graphene transfer is still one of critical issues for achieving the high-performance transparent graphene electrodes. Here, we report a crackless transfer method without the removal of polymer, which is usually utilized as the carrier for graphene transfer. This method enables the successful...
A novel kind of N-doped hierarchically porous carbon materials (HPC-Ns) has been successfully synthesized with hierarchically macro/mesoporous silica as a hard template followed by a simple N-doping procedure using low-cost and nontoxic urea as the nitrogen source. The synthesized HPC-N samples demonstrated extensive three-dimensional (3D) connected macroporosity and partially ordered mesoporosity,...
Thermally reduced graphene oxide (RGO)/MnO2 composites were prepared by the thermal reduction of graphene oxide (GO)/MnO2 composites. The structure, electrical conductivity and specific capacitance of the composites before and after thermal reduction were investigated by SEM, XRD, FT-IR,the four-point probe method and cyclic voltammetry. Results showed that the GO and RGO significantly decreased the...
Graphene derivatives generated by modifying the surface oxygen functional groups of graphene oxide have been widely investigated in recent years. Graphene derivatives possess excellent aqueous solubility and biocompatibility similar to graphene oxide, which are important in their biomedical application. Research progress on the use of graphene derivatives in biological imaging, drug carriers and photodynamic...
We investigated the variation of electronic transport in a semiconducting single-walled carbon nanotube (SWCNT) due to NO 2 molecules adsorbed on different locations of the SWCNT surface through a theoretical means. Our results indicate that the electronic conductance of a semiconducting SWCNT strongly depends on the distance between the electrode and the NO 2 adsorption site. In some...
A multi-wall carbon nanotube derivative was obtained using hydrogen bonding and a steric effect with a pluronic copolymer. The pluronic copolymer content is 75.5wt.% corresponding to a dense surface coverage of one modifying molecule per 390 carbon atoms of the nanotube. The material is a waxy solid at room temperature which melts and behaves like a liquid at 45°C.
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