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A hierarchically porous carbon nanofiber (HPCNF) material was prepared by a facile electrospinning method, with polyvinylpyrrolidone (PVP) as the carbon source and silica formed in-situ as the template. The carbon nanofibers showed a well-designed pore structure: centered macropores are surrounded by a denser cycle consisting of micro-/mesopores near the surface. Sulfur was encapsulated into the pores...
Transition metal sulfides coupled with carbon materials hold a promising application platform for high-performance supercapacitors. Herein, we report a strategy to fabricate a type of integrated CoSx hollow nanoparticles (HNPs)/C hybrid nanofibers via electrospinning technique combining with hydrothermal method. Results show that the in-situ formed CoSx HNPs were completely covered by a layer of onion-like...
It is demonstrated that the performances of supercapacitors are often affected by the electrochemical interface in their electrodes. In this work, the electrochemical interface in carbon nanofiber (CNF)/carbon nanotube (CNT) hierarchical composites was well optimized by tuning the diameters of electrospun CNF skeletons and the densities/lengths of CNT hierarchies. The optimized CNF/CNT composites...
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...
Multi–walled carbon nanotube (MWCNT) reinforced titanium matrix composites were synthesized using a spark plasma sintering method at a low sintering temperature of 550 °C. The effects of the weight fraction of MWCNTs on the microstructures and the mechanical and thermal properties of the composites were investigated. No reaction products were detected in the composites, indicating that the MWCNTs...
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...
Concentrated zinc chloride in ethanol was used to decompose the epoxy in carbon fiber/epoxy (CF/EP) composites to recover carbon fibers. Factors affecting the degradation rate such as reaction temperature and zinc chloride concentration were investigated. The properties of the products decomposed by epoxy and the recovered carbon fibers were characterized. Results indicated that the molecular weight...
The thermal conductance of graphene–matrix interfaces plays a key role in controlling the thermal properties of graphene-based nanocomposites. Using atomistic simulations, we found that the interfacial thermal conductance depends strongly on the mode of heat transfer at graphene–matrix interfaces: if heat enters graphene from one side of its basal plane and immediately leaves it through the other...
Carbon fibers (CFs) were oxidized by concentrated HNO 3 and then reacted with polyamidoamine dendrimers (PAMAM) with an average molecular weight of 157 to form CF–PAMAM. The CF–PAMAM was further reacted with oxidized carbon nanotubes (CNTs) to form CF–PAMAM–CNTs that were used as the reinforcement for epoxy resin-based composites. The functional groups and structure of the CF–PAMAM–CNTs were...
The purpose was to examine the anti-tumor and antimetastatic activities of fullerenol and their related mechanisms. Thirty EMT-6 tumor-bearing mice were injected intraperitoneally with 0.1ml saline or 0.1ml saline containing fullerenol C 60 (OH) 20 (0.08 and 0.4mg/ml) daily for 16days. Using tumor tissues, we investigated imbalances in the oxidative defense system and the expression...
Ketjen Black (KB) as an electrocatalyst support was treated at 900°C in the presence of cobalt and nickel nitrates, and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and nitrogen adsorption measurement. The treated KB (T-KB) exhibits better graphitization and a larger mesopore volume than the untreated material. A Pt electrocatalyst supported...
The Fe(CO) 5 catalyzed pyrolysis of pentane was investigated. The study, performed in a quartz tube, revealed that a range of carbonaceous materials could be formed with products determined by the temperature profile in the tube, the Fe(CO) 5 content in pentane, the carrier gas flow rate, the pyrolysis temperature and the pyrolysis time. The distribution of carbonaceous products also...
Reaction of propene over silica-, alumina- or titania-supported Ru catalysts in a tubular quartz flow reactor at moderate temperatures (500-700 o C) and atmospheric pressure produced Ru containing carbon nanofibres/tubes. TEM studies revealed that the fibres/tubes grew away from the support and contained Ru metal particles in their tips. The results indicate that sintering of the Ru during...
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