Results 261 to 270 of about 409,435 (303)
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Gold nanoparticles encapsulated in porous carbon
Chemical Communications, 2012Gold nanoparticles encapsulated in porous carbon spheres with high surface areas (~800 m(2) g(-1)) have been synthesized by ultrasonic spray pyrolysis (USP). The porous carbon-encapsulated gold nanoparticles exhibit excellent catalytic activity toward the reductions of both hydrophilic and hydrophobic nitroaromatics.
Jinrui, Guo, Kenneth S, Suslick
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Preparation of porous carbon spheres from porous starch
Solid State Ionics, 2009Abstract Porous carbon spheres were prepared through two steps: (a) coating a Na2SnO3 or Na2SiO3 protective layer onto the surface of porous starch, and then (b) carbonizing the products. The carbon spheres were characterized with X-ray diffraction, scanning electron microscopy and Raman spectroscopy.
Hongqiang Wang +7 more
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Phenol adsorption on porous and non-porous carbons
Carbon, 2003Phenol physisorption on a series of porous and non-porous amorphous carbons was studied at 298 K. Grand Canonical Monte Carlo computer simulations were performed to simulate phenol adsorption from the gas phase. Phenol is adsorbed in a solid-like state within the pores and there is no well-developed multilayer regime. The ‘t’ plot method was adapted to
C Bertoncini +4 more
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Porous carbon-carbon composites for fuel cells
Fibre Chemistry, 2007Technology for fabricating porous current-conducting gas-diffusion supports for fuel element electrodes made of carbon-carbon composites with the structure of fabrics, knits, and nonwovens was developed. The process scheme for manufacturing gas-diffusion electrodes for fuel cells was examined.
A. A. Tarasenko +2 more
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Micromechanical Modeling of Porous Carbon/Carbon Composites
Mechanics of Advanced Materials and Structures, 2005A procedure to model fiber-reinforced composites containing pores of irregular shapes is presented. Closed-form expressions for contributions of fibers and pores into effective elastic moduli are provided. The procedure is applied to predict the transverse elastic properties of unidirectional carbon/carbon composites (carbon fibers in pyrolytic carbon ...
I. Tsukrov +3 more
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Porous carbon and carbon composite hollow spheres
Colloid and Polymer Science, 2008In this communication, we propose a template approach toward synthesis of carbon hollow spheres by direct carbonization of highly crosslinked sulfonated polystyrene gel hollow spheres (sPS). The sulfonic acid group can facilitate carbonization. Moreover, the acid group can also induce a favorable growth of other materials within the sPS gel-forming ...
Shujiang Ding +5 more
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Porous Carbon—Carbon Absorbers for Oil Products
Fibre Chemistry, 2016Environmental contamination by oil products was examined. A method for producing a composite for absorption of oil products was proposed. The composite properties were investigated.
N. S. Lukicheva +3 more
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Biomechanical investigations of bone‐porous carbon and porous metal interfaces
Journal of Biomedical Materials Research, 1973AbstractThe mechanical strengths of four types of ingrown porous carbon and two types of porous metal bone implants were correlated with the type of osseous ingrowth into the porous interfaces. Intracortical cylinders were implanted into canine long bones and examined at 3, 6, and 12 weeks.
J L, Nilles, M, Lapitsky
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Porous carbon–carbon composite replicated from a natural fibre
Chemical Communications, 2005Highly porous carbon composites, suitable to be used as electrodes in electrochemical double layer capacitors, could be produced by pyrolysis of resorcinol-formaldehyde resins impregnated onto a natural fibre material (celullosic fabric), without additional template agents or special drying of the polymer gels.
Mariano M, Bruno +3 more
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Porous polymer carbons. II. Preparation and properties of porous poly(vinylidene chloride) carbons
Journal of Applied Polymer Science, 1975AbstractSuspension–polymerized copolymers of vinylidene chloride and ethylene glycol dimethacrylate have been converted into carbons by heating to 900°C. Poly(vinylidene chloride) homopolymer may melt on a first‐stage heating at ca. 200°C and consequently yields a fused 900°C carbon; restraining the first‐stage heating to slightly lower temperatures ...
G. J. Howard, S. Knutton
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