Effect of heat treatment in vacuo on the NO adsorption activity of α-FeOOH-dispersed activated carbon fibers

Carbon ◽  
1986 ◽  
Vol 24 (6) ◽  
pp. 772-774 ◽  
Author(s):  
K. Kaneko ◽  
K. Inouye
Keyword(s):  
Heat Treatment ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
No Adsorption ◽  
Adsorption Activity

scholarly journals Structural characterization of heat-treated activated carbon fibers

1992 ◽  
Vol 7 (7) ◽  
pp. 1788-1794 ◽  
Author(s):  
A.M. Rao ◽  
A.W.P. Fung ◽  
M.S. Dresselhaus ◽  
M. Endo
Keyword(s):  
Heat Treatment ◽  
Activated Carbon ◽  
Raman Scattering ◽  
Carbon Fibers ◽  
Insulator Transition ◽  
Activated Carbon Fibers ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Sequence Of Events ◽  
Heat Treated

Raman scattering, x-ray diffraction, and BET measurements are used to study the effect of heat treatment on the microstructure of activated carbon fibers (ACFs) and to correlate the structural changes with the metal-insulator transition observed in the electronic transport properties of heat-treated ACFs. A sequence of events is identified, starting with desorption, followed by micropore collapse plus the stacking of basic structural units in the c-direction, and ending up with in-plane crystallization. The graphitization process closely resembles that depicted by Oberlin's model, except that the final material at high-temperature heat treatment remains turbostratic. Because the metal-insulator transition was observed to occur at heat-treatment temperature THT ≃ 1200 °C, which is well below the THT value (2000 °C) for in-plane crystallization, we conclude that this electronic transition is not due to in-plane ordering but rather to the collapse of the micropore structure in the ACFs. Raman scattering also provides strong evidence for the presence of local two-dimensional graphene structures, which is the basis for the transport phenomena observed in heat-treated ACFs.

Novel Structure of Microporous Activated Carbon Fibers and Their Gas Adsorption

1994 ◽  
Vol 349 ◽  
Author(s):  
Toshiaki Enoki ◽  
Norikazu Kobayashi ◽  
Atsuko Nakayama ◽  
Kazuya Suzuki ◽  
Chiaki Ishii ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Gas Adsorption ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Activated Carbon Fibers ◽  
Dangling Bond ◽  
Spin Lattice ◽  
Helium Gas

ABSTRACTActivated carbon fibers are a kind of microporous carbon. Using dangling bond spins attached to the peripheries of the micropores, we investigated the microporous structures in relation to the heat-treatment and gas adsorption effects. Functional groups weakly bonded to the graphitic backbone are removed by the heat-treatment at moderate temperatures 200-400°C, resulting in the generation of a variety of dangling bond spins. The heattreatment above 500°C brings about homogenization of the dangling bond spins. For gas adsorption, the introduction of helium gas strongly enhances the spin-lattice relaxation rate for the dangling bond spins. In addition to a remarkably large condensation of helium gas in the microporous region, the enhancement proves the presence of ultra-micropores which can accommodate only the smallest diameter helium atoms.

scholarly journals NO adsorption on activated carbon fibers from iron-containing pitch

2008 ◽  
Vol 108 (1-3) ◽  
pp. 294-302 ◽  
Author(s):  
Juan Alcañiz-Monge ◽  
Agustín Bueno-López ◽  
Ma Ángeles Lillo-Rodenas ◽  
Ma José Illán-Gómez
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
No Adsorption

scholarly journals The Phenomenon of Improving of Turbostrate Structure of Carbon Fibers during Dynamic Contact of Surfaces of Solid States

2016 ◽  
Vol 17 (1) ◽  
pp. 134-143
Author(s):  
H.O. Sirenko ◽  
L.M. Soltys
Keyword(s):  
Heat Treatment ◽  
Activated Carbon ◽  
Mechanical Activation ◽  
Carbon Fibers ◽  
Frictional Contact ◽  
Dynamic Contact ◽  
Activated Carbon Fibers ◽  
Final Heat Treatment ◽  
Solid States ◽  
Quasicrystalline Structure

The influence of chemo-mechanical activation of dispersed carbon fibers in their turbostrate and quasicrystalline structure in terms of modeling frictional contact has been researched. It has been shown that change of parameters the structure of activated carbon fibers depends from the temperature of the final heat treatment and technology of obtaining of fibers and from the time of mechanical impact.

Oxidation of Activated Carbon Fibers:  Effect on Pore Size, Surface Chemistry, and Adsorption Properties

1999 ◽  
Vol 11 (12) ◽  
pp. 3476-3483 ◽  
Author(s):  
Christian L. Mangun ◽  
Kelly R. Benak ◽  
Michael A. Daley ◽  
James Economy
Keyword(s):  
Activated Carbon ◽  
Surface Chemistry ◽  
Pore Size ◽  
Carbon Fibers ◽  
Adsorption Properties ◽  
Activated Carbon Fibers
Sign in / Sign up

Export Citation Format

Share Document