Showing papers in "Carbon in 2000"

TL;DR: A series of activated carbons with different degrees of activation were oxidized with H2O2, (NH4)2S2O8 and HNO3 in order to introduce different oxygen surface complexes as discussed by the authors.

TL;DR: In this article, the correlation between the microstructural parameters and electrochemical properties of conventional and novel types of carbon materials for Li ion batteries, namely, graphitizable carbons such as milled mesophase pitch-based carbon fibers, polyparaphenylenebased carbon heat-treated at low temperatures and boron-doped graphitized materials, was described.

TL;DR: In this article, a review describes the recent activities in Japan on the study of pore structure control in carbon, focusing on the control of both micro- and mesoporosity.

TL;DR: In this article, a field emission microscopy (FEM) study was carried out for both multi-wall nanotubes (MWNTs) and single-wall nano-graphs (SWNTs), produced by arc discharge between carbon electrodes.

TL;DR: In this paper, the influence of carbonization and activating reagent on the pore structure of the activated carbon was investigated, and it was found that the maximum surface area were obtained at the carbonization temperature of 600°C in both ZnCl2 and H3PO4 activation, and that the surface areas were as large as those of the commercial activated carbons.

TL;DR: In this paper, the effects of carboxylic and carbonyl groups on the adsorption of dissolved aromatics on activated carbon have been studied, and the main mechanisms by which surface oxygen groups influence the adorption capacity were found not to be significant.

TL;DR: In this paper, a novel foaming technique and the evaluation of the foaming characteristics of two mesophase pitches (Mitsubishi ARA24 and Conoco Dry Mesophase) were presented.

TL;DR: In this paper, a series of phenolic resin-based microporous activated carbon fibers (ACF) were used to determine how pore size distribution influences the nature of the adsorption competition mechanism between the micropollutant, atrazine, and a compound similar in size, methylene blue (MB).

TL;DR: The recent development of de-SOx and de-NOx using activated carbon fibers (ACF) in Japan is introduced in this paper, comparing it with the conventional commercialized system.

TL;DR: In this paper, the authors investigated the furnace temperature dependence for each catalyst to control the diameter of SWNTs more strictly and investigated the effect of the gas flow velocity to see the growth time.

TL;DR: In this paper, the influence of the mesopore volume and the size of adsorbates on the adsorption capacity of granular activated carbons and activated carbon fabric was explored.

TL;DR: Fluorination is one of the most effective chemical methods to modify and control physicochemical properties of carbon materials as mentioned in this paper, but the interpretation of the results are not necessarily facile.

TL;DR: In this article, the authors studied the sorption behavior of four kinds of heavy oils into exfoliated graphites with different bulk densities and found that their sorption occurred very rapidly, i.e. within 2 min.

TL;DR: In this paper, a series of micro-and mesoporous activated carbons were produced from paper mill sludge using a modified carbonization methodology using N2-adsorption isotherm data and mathematical models such as the D-R equation, αsplot, and MP and BJH methods.

TL;DR: Mesophase pitch has been synthesized from pure aromatic hydrocarbons aided by an HF-BF3 catalyst as mentioned in this paper, which has better performance for many applications such as carbon fibers, binders, and anode materials for lithium ion batteries etc.

TL;DR: In this paper, the authors used high-resolution transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX) to study the nature of the activated and decorated nanotubes.

TL;DR: In this article, the porosity of activated carbons was found to be related to the concentration and type of the impregnated salt solutions and the surface area and the nature of the resulting activated carbon.

TL;DR: In this article, the As(V) and As(III) removal efficiency of a char-carbon (CC), derived from fly ash in this laboratory, is compared with those of a commercially available Darco activated carbon (DC) and a carbon produced by arcing of graphite rods (AC).

TL;DR: In this paper, the authors present a new model to describe the adsorption equilibrium of water in activated carbon, which is based on the growth of the water cluster at the functional groups and the penetration of water clusters into the micropore in the form of pentamer.

TL;DR: In this paper, a number of activated carbons produced from peat, coconut shell, and by pyrolysis of hydrocarbons have been subjected to treatment with oxygen, chlorine, hydrogen or ammonia at elevated temperatures to get a representative series of catalyst supports differing in porous structure and surface chemistry (characterized by nitrogen adsorption and selective titrations).

TL;DR: In this article, a mixture of wood with either phosphoric acid or diammonium hydrogen phosphate (NH ) HPO was heated under 42 4 nitrogen or steam / nitrogen flows at temperatures between 300 and 500 8C.

TL;DR: In this article, a series of experiments have been conducted to study the effects of carbonization temperature on pore development in palm shell activated carbon, and no clear pattern was demonstrated on the effects on the development of mesopore and macropore volumes.

TL;DR: In this paper, X-ray diffraction measurements showed that the d(002) value depends both on B at.% in the deposits and on the reaction temperature, and the number of boron-to-boron connected atoms increases rapidly when the borton content is higher.

TL;DR: In this paper, B-and N-doped single-walled carbon nanotubes (SWNTs) were synthesized at high yields under thermo-chemical treatment of pure C SWNT bundles and B2O3 in a flowing nitrogen atmosphere.

TL;DR: In this article, the effect of surface treatment on the mechanical, surface and interfacial properties of carbon fibres was determined and correlated, and it was shown that a relationship exists between the ability of the surface to transfer loads and its oxygen content.

TL;DR: In this article, Resorcinol-formaldehyde (RF) gels were synthesized by sol-gel polycondensation of resorcinols with formaldehyde to prepare mesoporous carbon precursors.

TL;DR: In this paper, a special form of temperature-programmed desorption (TPD) has been applied to one of the carbon samples (prepared from almond shells and oxidized with nitric acid) in order to determine the variation of the apparent activation energy of CO and CO2 as the coverage of the surface decreases.

TL;DR: In this article, a new technique to obtain structural parameters Lc, La and d, of phenol formaldehyde resin char (PFC) from TEM images has been developed.