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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal DOI :
Korean Carbon Society
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Volume & Issues
Volume 9, Issue 4 - Dec 2008
Volume 9, Issue 3 - Sep 2008
Volume 9, Issue 2 - Jun 2008
Volume 9, Issue 1 - Mar 2008
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Adsorption of Dyes from Aqueous Solution by Cow Dung Ash
Rattan, V.K. ; Purai, Abhiti ; Singh, Harminder ; Manoochehri, Mahboobeh ;
Carbon letters, volume 9, issue 1, 2008, Pages 1~7
DOI : 10.5714/CL.2008.9.1.001
The ability of cow dung ash without any pretreatment to remove color from textile dyes N Blue RGB, Green B and EOSIN YWS from aqueous solution has been investigated in this work. Cow dung ash, an ecofriendly and low cost adsorbent was prepared by burning cow dung cakes in the muffle furnace at
. The adsorption was achieved under different pH and adsorbate concentration. The data was fitted to simple polynomial and the isotherms similar to Langmuir and Freundlich isotherms.
Removal of Pb(II) and Cd(II) From Aqueous solution Using Oxidized Activated Carbons Developed From Pecan Shells.
Youssef, A.M. ; EL-Khouly, Sahar M. ; El-Nabarawy, Th. ;
Carbon letters, volume 9, issue 1, 2008, Pages 8~16
DOI : 10.5714/CL.2008.9.1.008
Oxidized activated carbons were prepared by reacting steam-activated carbon developed from pecan shells with nitric acid of varying strength (15, 30, 45 and 60%). The textural properties and the chemistry of the surface of the non-oxidized and of the oxidized carbons were determined from nitrogen adsorption and base neutralization capacities. The uptake of Pb(II) and Cd(II) from aqueous solution by these carbons was determined by kinetic and equilibrium experiments as well as by the column method. Treatment with nitric acid brought about drastic decrease in surface area and remarkable increase in the pore size of the carbon with these changes depending on the strength of nitric acid. Nitric acid increased the surface acidity by developing new surface oxygen functional groups of acidic nature.
-oxidized carbons exhibited high adsorption capacities for Pb(II) and Cd(II). The adsorption of these ions increased with the decrease of the surface pH of the carbon and with the increase of the solution pH from 2.5 to 6 and 7. The amount adsorbed from lead and cadmium was also related to the amount of surface acidity, the pH of the point of zero charge and on some metal ion parameters. Cadmium and lead uptake by the investigated carbons followed pseudo-second order model and the equilibrium sorption data fitted Langmuir adsorption model.
Laser Ablated Carbon Thin Film from Carbon Nanotubes and Their Property Studies
Sharon, Maheshwar ; Rusop, M. ; Soga, T. ; Afre, Rakesh A. ;
Carbon letters, volume 9, issue 1, 2008, Pages 17~22
DOI : 10.5714/CL.2008.9.1.017
A carbon nanotube (CNT) of diameter ~20 nm has been synthesized by spray pyrolysis of turpentine oil using Ni/Fe catalyst. Pellet of CNTs has been used as a target to produce semiconducting carbon thin film of band gap 1.4 eV. Presence of oxygen pressure in the pulse laser deposition (PLD) chamber helped to control the
ratio to achieve the desired band gap. Results are discussed with the help of Raman spectra, SEM TEM micrographs and optical measurements suggest that semiconducting carbon thin film deposited by PLD technique has retained its nanotubes structure except that its diameter has increased from 20 nm to 150 nm.
Selective Removal of Cr (VI) and Cr (III) in Aqueous Solution by Surface Modified Activated Carbon
Lee, Jeong-Min ; Kim, Min-Il ; Lee, Young-Seak ;
Carbon letters, volume 9, issue 1, 2008, Pages 23~27
DOI : 10.5714/CL.2008.9.1.023
The adsorption and reduction of Cr (VI) to Cr (III) by surface modified activated carbon (AC) in an aqueous solution was studied. The effects of surface modifications on the properties of the carbons were investigated by the analysis of specific surface area, carbon surface pH, acid/base surface values and functional groups. In order to understand the Cr(VI) adsorption and reduction ratio from Cr(VI) to Cr(III), the Cr adsorption capacity of AC was also measured and discussed by using inductively coupled plasma and UV spectrophotometer. The modifications bring about substantial variation in the chemical properties whereas the physical properties such as specific surface area, pore volume and pore size distribution nearly were not changed. Total Cr adsorption efficiency of as-received activated carbon (R-AC) and nitric acid treated activated carbon (N1-AC and N2-AC) were recorded on 98.2, 99.7 and 100%. Cr(III) reduction efficiency of R-AC increased largely from 0.4% to 28.3% compared to N1-AC and N2-AC.
Flexural Behaviors of 4D Carbon/carbon Composites with the Preform Architectures
Lee, Ki-Woong ; Park, Jong-Min ; Joo, Hyeok-Jong ;
Carbon letters, volume 9, issue 1, 2008, Pages 28~34
DOI : 10.5714/CL.2008.9.1.028
Multidirectional reinforcement is aimed primarily at overcoming interlaminar weakness, hence a major interest lies in the mechanical properties of multidirectional carbon/carbon composites. Mechanical properties depend on the type of carbon fiber, the size of the fiber bundle, the spacing of the bundles, the angles of the bundles relative to the axes of the block, and matrix formation. In the present studies, PAN based carbon fiber preforms manufactured different size of unit cell have been prepared. Densification of these used high pressure infiltration and carbonization technique with coal tar pitch as matrix precursor was carried out. Scanning electron microscopy has been used to study the fracture behavior of composites. The size of unit cell of the preforms has considerably affected on the flexural properties as well as microstructure of the carbon/carbon composites.
Patent Trends of Carbonaceous Materials for Hydrogen Storage (III): Major Applicants & Technology Flow-chart
Park, Soo-Jin ; Kim, Byung-Joo ; Lee, Young-Seak ;
Carbon letters, volume 9, issue 1, 2008, Pages 35~46
DOI : 10.5714/CL.2008.9.1.035
Carbon Materials as Catalysts
Lim, Seong-Yop ; Jung, Doo-Hwan ; Yoon, Seong-Ho ; Mochida, Isao ;
Carbon letters, volume 9, issue 1, 2008, Pages 47~60
DOI : 10.5714/CL.2008.9.1.047
Understanding the exact structure and surface characteristics of carbon materials is very important for design, synthesis, and utilization of the best carbon form with particular functions and high performance for practical applications such as selective adsorption adsorbents, energy storage materials, catalysts or catalyst supports, etc. This review paper focuses on carbon surface properties and the interaction between gaseous or liquid substances and carbon surface. Catalytic functions of carbon materials are reviewed including recent progress in synthesis and applications of nano-carbons.