The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Chunxu Pan - One of the best experts on this subject based on the ideXlab platform.
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Supercapacitance of Solid Carbon Nanofibers Made from Ethanol Flames
The Journal of Physical Chemistry C, 2008Co-Authors: Qiaoliang Bao, Chunxu Pan, Shu-juan Bao, Jianfeng Zang, Dingyuan Tang, Sam ZhangAbstract:Solid Carbon nanofibers (CNFs) made from ethanol flames were used to prepare supercapacitors. Their microstructure, crystallinity, porosity, chemical properties, and electrochemical activity were compared with the multiwalled Carbon nanotubes (MWCNTs) synthesized by chemical vapor deposition. The produced CNFs have a unique microstructure with a Solid core and porous surface. The specific surface area of CNFs was comparable to that of MWCNTs because of their larger amount of micropores on the surface. The synthesis environment also resulted in abundant functional groups absorbed on the surface of the CNFs. Electrochemical characterization shows that CNFs have much larger capacitance than that of MWCNTs. The capacitance of CNFs consists of both double-layer capacitance contributed by micropores and pseudo-capacitance produced from redox reactions of the absorbed oxygen functional groups. In comparison to the reported MWCNTs-based supercapacitors, the CNF demonstrates more promising potential in energy stor...
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Graphitization of Solid Carbon nanofibers at an unexpectedly low temperature
Materials Letters, 2007Co-Authors: Xuefeng Ruan, Chunxu PanAbstract:Microstructural changes in Solid Carbon nanofibers (CNFs) at an unexpectedly low temperature are studied using electron microscopes and laser Raman spectroscopy. The disordered structure of the CNFs starts to become graphitic at temperatures as low as 1000 °C which is believed to be due to their small size.
Luc Lamberts - One of the best experts on this subject based on the ideXlab platform.
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Zeolite-modified Solid Carbon paste electrodes
Journal of Solid State Electrochemistry, 2003Co-Authors: Alain Walcarius, Pascal Mariaulle, Luc LambertsAbstract:New zeolite-modified Carbon-based electrodes are described. They are based either on the physical anchoring of zeolite particles on the surface of Solid Carbon paste (the viscosity of which can be tuned by temperature change or controlled dissolution by an organic solvent), or on the dispersion of zeolite particles in the bulk of a Carbon paste matrix containing Solid paraffin as a binder. Both these systems display superior electrochemical performance in comparison to corresponding "classical" zeolite-modified Carbon paste electrodes using mineral oil as binder. These well-described composites usually suffer from poor mechanical stability in stirred media as well as memory effects due to significant ingress of the external solution into the bulk electrode. Advantages of the zeolite-modified Solid Carbon paste electrodes are reported mostly on the basis of two electroanalytical applications: the voltammetric detection of Cu^2+ ions after accumulation by ion exchange at open circuit, and the indirect amperometric detection of non-electroactive species (i.e. Na^+) in flow injection analysis.
Xuefeng Ruan - One of the best experts on this subject based on the ideXlab platform.
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Graphitization of Solid Carbon nanofibers at an unexpectedly low temperature
Materials Letters, 2007Co-Authors: Xuefeng Ruan, Chunxu PanAbstract:Microstructural changes in Solid Carbon nanofibers (CNFs) at an unexpectedly low temperature are studied using electron microscopes and laser Raman spectroscopy. The disordered structure of the CNFs starts to become graphitic at temperatures as low as 1000 °C which is believed to be due to their small size.
Abdoul Karim Sakira - One of the best experts on this subject based on the ideXlab platform.
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determination of arsenic iii at a nanogold modified Solid Carbon paste electrode
Electroanalysis, 2015Co-Authors: Abdoul Karim Sakira, Eric Ziemons, Dominique Mertens, Bieke Dejaegher, Issa T. Some, Philippe Hubert, Jean Michel KauffmannAbstract:A selective and sensitive electroanalytical method was developed for arsenic determination based on a nanogold (AuNP) modified Solid Carbon paste working electrode (SCPE) modified in two steps (i) physisorption and (ii) additional electrodeposition of nanogold particles in the presence of iodide. Copper(II) interference was solved by covering the gold layer by a self assembled mono layer (SAM) of glutathione. Using DPASV a linear response of the signal was obtained as a function of As(III) in the concentration range 0.05–20 µM (4–1498 ppb) with a limit of detection of 0.01 µM (0.9 ppb). Sample stirring and degassing were not needed. Application to the determination of arsenic(III) and (V) in underground water samples from Burkina Faso was successfully achieved.
John W. Halloran - One of the best experts on this subject based on the ideXlab platform.
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Extraction of hydrogen from fossil fuels with production of Solid Carbon materials
International Journal of Hydrogen Energy, 2008Co-Authors: John W. HalloranAbstract:Abstract Fossil fuels can be considered as hydrogen ores for CO2-free energy, and Carbon ores for Carbon construction materials. This paper discusses methods for extraction of hydrogen from fossil fuels without Carbon oxidation, with co-production of high value Solid Carbon material products.
