The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Flexible fiber-shaped microelectrode biosensors have aroused intensive attention due to the promising use for monitoring personal healthcare. However, challenges still exist in the pursuit of combination of high sensitivity and selectivity. Herein, a facile and effective strategy to solve these problems was proposed by developing a novel fiber-shaped photoelectrochemical urea biosensor (PUB) based...
In this article, the polyamide (PA)/reduced graphene (rGO) nanocomposites used for thermally conductive materials have been synthesized through melting blending. A titanate coupling agent (TCA) is used to modify the rGO to enhance the chemical compatibility between rGO and PA. The results suggest that the covalent bonds can be formed by the chemical reaction between alkoxy group of titanate molecules...
Multiwalled carbon nanotubes (MWCNTs) were surface modified with titanium carbide (TiC) nanocrystalline particles by a novel pressureless spark plasma sintering method. The microstructure and properties of the nano-TiC modified MWCNTs were characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, thermal gravity analysis and nanoindentation. Experimental results...
Highly ordered mesoporous carbons (OMCs) designated CMK-3 were synthesized using mesoporous Al-SBA-15 with different textural properties as hard templates and sucrose as a carbon source. Al-SBA-15 is an ordered mesoporous alumina-silica synthesized with a soft template, P123. The effect of the aging temperature for the hard templates on the pore structure of CMK-3 was investigated. X-ray diffraction,...
A non-contact method is proposed to characterize graphene at microwave frequency by combining Raman spectroscopy and Amphenol Precision Connector (APC-7). The CVD-grown graphene is transferred to the ring-shape Teflon substrate and characterized by Raman spectroscopy to estimate its doping density and the related Fermi energy. The graphene is then sandwiched between two APC-7 coaxial connectors and...
Natural graphite was modified by oxidation with a mixture of sulfuric acid (98%) and hydrogen peroxide (30%) with a volume ratio of 1:1, followed by a heat treatment under argon at 900°C for 3h to overcome its disadvantages of the presence of active surface groups and volume changes produced by the intercalation/deintercalation of Li ions. Results showed that the graphitic layers of the expanded graphite...
Five types of carbon materials, including carbon nanotubes (CNTs), carbon nanofibres, carbon black, activated carbon and graphite, were evaluated in searching for an appropriate support for a Pt catalyst used for the dehydrogenation of decalin under microwave irradiation (MW). The thermal behaviour of different carbon materials and supported Pt catalysts suspended in decalin under MW was investigated...
Hafnium carbide (HfC) modified carbon/carbon (HfC-C/C) composites were prepared by impregnating carbon felts with a saturated HfOCl 2 ·8H 2 O ethanol solution and heat treating at 600°C to form HfO 2 /C composites that were then densified with pyrocarbon by chemical vapor infiltration and graphitized at 2100°C to convert HfO 2 into HfC. The HfC-C/C composites as rocket...
A network-like carbon nanofiber (CNF) film with an open porous structure formed by the open space between entangled CNFs is fabricated by electrophoretic deposition. The performance of the CNF film as an electrocatalyst in the presence of electrodeposited Pd nanoparticles for ethanol oxidation in alkaline media is investigated. Cyclic voltammetric analyses show the electrocatalyst has a good electrocatalytic...
A fishbone type carbon nanofiber (CNF) is functionalized by different chemical and thermal treatments, and characterized by TPD, FT-IR and XPS. TPD is proved to be an effective technique to characterize surface oxygen complexes on carbon nanofibers, a novel type of mesoporous and highly graphitic carbon material. TPD spectra are analyzed by a modified deconvolution method with a multiple Gaussian...
Catalytically grown carbon nanofibers, a novel mesoporous carbon material for catalysis, were synthesized by the decomposition of carbon-containing gases (CH 4 , C 2 H 4 or CO) over supported nickel-iron alloy and unsupported iron. It was shown that the structures of as-synthesized and modified CNFs, including the arrangement of the graphenes in CNF, and the crystallinity and...
Multi-walled carbon nanotubes (MWNTs) were electrochemically oxidized by a constant-potential electrolysis method and then investigated in detail using scanning electron microscope, transmission electron microscope, FT-IR, electrical impedance spectroscopy, and cyclic voltammetry. The FT-IR spectra showed that the amount of hydroxyl generated on the surface of MWNTs increased with increasing the electrochemical...
Catalytically grown carbon nanofibers (CNFs) are shaped into pellets in desired size and configuration by a conventional molding process so as to extend the potential applications of CNFs in industrial heterogeneous catalysis. After shaping, a novel carbon nanofiber composite with sufficient mechanical strength is produced, in which isolated CNFs are connected by a carbon network formed through polymer...
The breakthrough curves were measured for the adsorption of aqueous Pb(NO 3 ) 2 on activated carbon fibers (ACFs) in a fixed-bed adsorber. With the adsorption equilibrium constant and the intraparticle diffusivity determined from separate experiments in a batch tank, the breakthrough curves were predicted by the orthogonal collocation method. By the analysis of the effects of intraparticle...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.