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141.

Catalytic hydrogenation-assisted preparation of melt spinnable pitches from petroleum residue for making mesophase pitch based carbon fibers

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 4 28-35 (8 pages)

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 저
...
- 3,000원
We demonstrated an effective way of preparing melt spinnable mesophase pitches via catalytic hydrogenation of petroleum residue (fluidized catalytic cracking-decant oil) and their subsequent thermal soaking. The mesophase pitches thus obtained were analyzed in terms of their viscosity, elemental composition, solubility, molecular weight, softening point and optical texture. We found that zeolite-induced catalytic hydrogenation under high hydrogen pressure contributed to a large variation in the...
142.

Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite

Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)

Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 저
...
- 3,000원
Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT...
143.

Study on properties of eco-friendly reduction agents for the reduced graphene oxide method

Young-il Na, Young Il Song, Sun Woo Kim, Su-Jeong Suh 한국탄소학회 Carbon Letters 9 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 1 1-9 (9 pages)

Young-il Na, Young Il Song, Sun Woo Kim, Su-Jeong Suh 저
...
- 3,000원
We studied the basic properties and fabrication of reduced graphene oxide (rGO) prepared using eco-friendly reduction agents in the graphene solution process. Hydrazine is generally used to reduce graphene oxide (GO), which results in polluting emissions as well as fixed nitrogen functional groups on different defects in the graphene sheets. To replace hydrazine, we developed eco-friendly reduction agents with similar or better reducing properties, and selected of them for further analysis. In...
144.

Facile fabrication of electrospun polyacrylonitrile/ poly(vinylidene fluoride)-based carbon nanofibers for supercapacitor electrodes

Hyo In Lee, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 12 79-83 (5 pages)

Hyo In Lee, Soo-Jin Park 저
...
- 1,500원
Energy storage devices and renewable energy sources are some of the most interesting alternatives being developed to solve the energy crisis [1,2]. At the same time, energy harvesting and storage devices are among the technologies with the highest potential to efficiently satisfy the energy requirements of compact electronic devices [3]. Among various energy storage devices, supercapacitors are the among the most intensely researched because of their high power density, long cycle retention, and...
145.

Lyocell-based activated carbon fibers improved the adsorption of harmful gas properties when produced via dual-simultaneous treatments

Byong Chol Bai, Ji Sun Im, Young-Seak Lee 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 10 69-73 (5 pages)

Byong Chol Bai, Ji Sun Im, Young-Seak Lee 저
...
- 1,500원
In gas adsorption processes, activated carbon fibers (ACFs) are used for the adsorption of the harmful gases that are generated by coal or oil combustion, and they have been widely studied [1,2]. ACFs have been used for harmful gas removal because of their specific surface area, micropores, reproducibility, safety, and processing ability, which are beneficial properties for a wide range of applications [3,4].
146.

Capacitance behaviors of conducting polymer-coated graphene nanosheets composite electrodes containing multi-walled carbon nanotubes as additives

Hoe-Seung Kim, Yongju Jung, Seok Kim 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 9 63-68 (6 pages)

Hoe-Seung Kim, Yongju Jung, Seok Kim 저
...
- 3,000원
Global warming is rapidly becoming a major concern as a result of the continuing emissions of greenhouse gases generated by the combustion of fossil fuels. To resolve this problem, various studies on efficient energy storage devices have been undertaken. Electronic technologies are increasingly used in electronic products and systems, and they require effective energy storage [1,2]. Supercapacitors are energy storage devices with high power density and long cycle life, and have been spotlighted...
147.

Electrochemical determination of chloramphenicol using a glassy carbon electrode modified with dendrite-like Fe₃O₄ nanoparticles

Krishnan Giribabu, Sung-Chan Jang, Yuvaraj Haldorai, Muruganantham Rethinasabapathy, Seo Yeong Oh, Arunkumar Rengaraj, Young-Kyu Han 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 6 38-47 (10 pages)

Krishnan Giribabu, Sung-Chan Jang, Yuvaraj Haldorai, Muruganantham Rethinasabapathy, Seo Yeong Oh, Arunkumar Rengaraj, Young-Kyu Han 저
...
- 3,000원
-1.3 V for 180 s. Scanning electron microscopy revealed that dendrite-like Fe3O4 nanoparticles with a mean size of < 80 nm were electrodeposited on a glassy carbon electrode (GCE). The Fe3O4/GCE was utilized for sensing chloramphenicol (CAP) by cyclic voltammetry and square wave voltammetry. A reduction peak of CAP at the Fe3O4/GCE was observed at 0.62 V, whereas the uncoated GCE exhibited a very small response compared to that of the Fe3O4/GCE. The electrocatalytic ability of Fe3O4 was mainly...
148.

Adsorption of Nile Blue A from aqueous solution by different nanostructured carbon adsorbents

Shahryar Abbasi, Hadi Noorizadeh 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 5 30-37 (8 pages)

Shahryar Abbasi, Hadi Noorizadeh 저
...
- 3,000원
by scanning electron microscope and X-ray diffractometer. The effects of various parameters were investigated. Kinetic adsorption data were analyzed using the first-order model and the pseudo-second-order model. The regression results showed that the adsorption kinetics were more accurately represented by the pseudo-second-order model. The equilibrium data for the aqueous solutions were fitted to Langmuir and Freundlich isotherms, and the equilibrium adsorption of NBA was best described by the...
149.

Mechanical and electrical properties of cement paste incorporated with pitch-based carbon fiber

Inkyu Rhee, Jin Hee Kim, Sang Hee Park, Sungho Lee, Bong Ryeul Ryu, Yoong Ahm Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 4 22-29 (8 pages)

Inkyu Rhee, Jin Hee Kim, Sang Hee Park, Sungho Lee, Bong Ryeul Ryu, Yoong Ahm Kim 저
...
- 3,000원
The compressive strength and electrical resistance of pitch-based carbon fiber (CF) in cementitious materials are explored to determine the feasibility of its use as a functional material in construction. The most widely used CFs are manufactured from polyacrylonitrile (PAN-based CF). Alternatively, short CFs are obtained in an economical way using pitch as a precursor in a melt-blown process (pitch-based CF), which is cheaper and more eco-friendly method because this pitch-based CF is basically...
150.

Synthesis, characterization, and antibacterial performance of Ag-modified graphene oxide reinforced electrospun polyurethane nanofibers

Bishweshwar Pant, Mira Park, Rae-Sang Jang, Woo-Cheol Choi, Hak-Yong Kim, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 3 17-21 (5 pages)

Bishweshwar Pant, Mira Park, Rae-Sang Jang, Woo-Cheol Choi, Hak-Yong Kim, Soo-Jin Park 저
...
- 1,500원
distribution of GO sheets along with Ag nanoparticle in the nano?bers was investigated by scanning electron microscopy and the elemental mapping technique. X-ray diffraction and thermal gravimetric analysis veri?ed the presence of GO and Ag in the bicomposite nano?brous mats. Antibacterial tests against Escherichia coli demonstrated that the addition of GO and Ag-RGO to the PU nano?ber greatly enhanced bactericidal efficiency. Overall, these features of the synthesized nano?bers make them a...

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