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Carbon-Based Solid Acid as an Efficient and Reusable Catalyst for the Synthesis of 1,8-Dioxodecahydroacridines Under Solvent-Free Conditions
Davoodnia. Abolghasem, Khojastehnezhad. Amir, Tavakoli-Hoseini. Niloofar 대한화학회 Bulletin of the Korean Chemical Society 6 Pages
대한화학회 Bulletin of the Korean Chemical Society 2011, Vol.32 No.7 2243-2248 (6 pages)
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Carbon-based Solid Acid Catalyzed One-pot Mannich Reaction: A Facile Synthesis of β-Amino Carbonyl Compounds
Davoodnia. Abolghasem, Tavakoli-Nishaburi. Afsaneh, Niloofar. Tavakoli-Hoseini 대한화학회 Bulletin of the Korean Chemical Society 4 Pages
대한화학회 Bulletin of the Korean Chemical Society 2011, Vol.32 No.2 635-638 (4 pages)
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Applications of carbon-based materials in solid phase micro-extraction: a review
Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)
of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption effects of SPME fiber. This review introduces... -
Microwave heating of carbon-based solid materials
Teawon Kim, Jaegeun Lee, Kun Hong Lee 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 2 15-24 (10 pages)
of carbon-based materials has been mainly limited to liquid solutions. However, more rapid and efficient heating is possible in electron-rich solid materials, because the target materials absorb the energy of microwaves effectively and exclusively. Carbon-based solid materials are suitable for microwave- heating due to the delocalized pi electrons from sp2-hybridized carbon networks. In this perspective review, research on the microwave heating of carbon-based solid materials is extensively... -
Superhydrophobic carbon-based materials: a review of synthesis, structure, and applications
Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 16 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 5 89-104 (16 pages)
Materials with appropriate surface roughness and low surface energy can form superhydrophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers, carbon nanotubes, graphene, amorphous carbons, etc. Recent advances in emerging fields such as... -
Morphologies and surface properties of cellulose-based activated carbon nanoplates
Seulbee Lee, Min Eui Lee, Min Yeong Song, Se Youn Cho, Young Soo Yun, Hyoung-Joon Jin 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 5 32-38 (7 pages)
In this study, cellulose nanoplates (CNPs) were fabricated using cellulose nanocrystals obtained from commercial microcrystalline cellulose (MCC). Their pyrolysis behavior and the characteristics of the product carbonaceous materials were investigated. CNPs showed a relatively high char yield when compared with MCC due to sulfate functional groups introduced during the manufacturing process. In addition, pyrolyzed CNPs (CCNPs) showed more effective chemical activation behavior compared with... -
One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction
Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 8 53-64 (12 pages)
Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metal system were synthesized as non-Pt catalysts for the ORR. The highly nitrogen doped OMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide) for N/C species and a mesoporous silica template for the physical structure. Mostly, N-doped carbons are promoted by a single transition metal to improve catalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbons were... -
Preparation of novolac-type phenol-based activated carbon with a hierarchical pore structure and its electric double-layer capacitor performance
Dayoung Lee, Jin-Young Jung, Mi-Seon Park, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 6 192-197 (6 pages)
A hierarchical pore structured novolac-type phenol based-activated carbon with micropores and mesopores was fabricated. Physical activation using a sacrificial silicon dioxide (SiO2) template and chemical activation using potassium hydroxide (KOH) were employed to prepare these materials. The morphology of the well-developed pore structure was characterized using field-emission scanning electron microscopy. The novolac-type phenol-based activated carbon retained hierarchical pores (micropores... -
Recent Advances in Carbon-Nanotube-Based Epoxy Composites
Fan-LongJin, Soo-JinPark 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.1 1 1-13 (13 pages)
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Kinetic and multi-parameter isotherm studies of picric acid removal from aqueous solutions by carboxylated multi-walled carbon nanotubes in the presence and absence of ultrasound
Soheila Gholitabar, Hasan Tahermansouri 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 2 14-24 (11 pages)
Carboxylated multi-wall carbon nanotubes (MWCNTs-COOH) have been used as efficient adsorbents for the removal of picric acid from aqueous solutions under stirring and ultrasound conditions. Batch experiments were conducted to study the influence of the different parameters such as pH, amount of adsorbents, contact time and concentration of picric acid on the adsorption process. The kinetic data were fitted with pseudo-first order, pseudo-secondorder, Elovich and intra-particle diffusion models.... -
Extraction and characterization of lignin from black liquor and preparation of biomass-based activated carbon therefrom
Daeyeon Kim, Jinsil Cheon, Jeonghoon Kim, Daekyun Hwang, Ikpyo Hong, Oh Hyeong Kwon, Won Ho Park, Donghwan Cho 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 14 81-88 (8 pages)
In the present study, biomass-based lignin was extracted from industrial waste black liquor and the extracted lignin was characterized by means of attenuated total reflectance- Fourier transform infrared spectroscopy and 1H-nuclear magnetic resonance spectroscopy. The extracted lignin was carbonized at different temperatures and then activated with steam at 850oC. The extracted lignin in powder state was transformed into a bulky carbonized lignin due to possible fusion between the lignin... -
Biocomposite membranes based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and multiwall carbon nanotubes for gas separation
Mongyoung Huh, Hye Min Lee, Young Soo Park, Seok Il Yun 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 17 116-121 (6 pages)
The development of gas separation membranes is currently an active research area because of the rapidly increasing interest in carbon dioxide capture and hydrogen recovery, which are two of the most important solutions for problems related to energy and the environment [1-4]. Polymer membranes show selectivity in the separation of gases due to differences in the permeability of individual gases through the polymer film [3,4]. Even though advantageous in terms of low cost, the segmental... -
Pitch-based carbon fibers from coal tar or petroleum residue under the same processing condition
Jiyoung Kim, Ui-Su Im, Byungrok Lee, Dong-Hyun Peck, Seong-Ho Yoon, Doo-Hwan Jung 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 9 72-78 (7 pages)
and carbon fibers were successfully prepared from petroleum or coal pyrolysis residues. After pyrolysis fuel oil (PFO), slurry oil, and coal tar were simply filtered to eliminate the solid impurities, the characteristics of the raw materials were evaluated by elemental analysis, 13C nuclear magnetic resonance spectrometer, matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MALDI-TOF-MS), and so on. Spinnable pitches were prepared for melt-spinning carbon fiber through... -
Cellulose-based carbon fibers prepared using electron-beam stabilization
Min Il Kim, Mi-Seon Park, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 9 56-61 (6 pages)
Cellulose fibers were stabilized by treatment with an electron-beam (E-beam). The properties of the stabilized fibers were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The E-beam-stabilized cellulose fibers were carbonized in N₂ gas at 800°C for 1 h, and their carbonization yields were measured. The structure of the cellulose fibers was determined to have changed to hemicellulose and... -
Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning
Yong-Mun Choi, in Jung Jun Yeon, Hwang Seung Min, Kim Hyeonsu Jeong, Bon-Cheol Ku, Munju Goh 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 1 223-232 (10 pages)
This review presents current progress in the preparation methods of liquid crystalline nanocarbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide. -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
and the use of CFRP has been impeded by the high cost of CF in various applications. This paper presents an overview of research related to the fabrication of low cost CF using polyethylene (PE) control technology, and identifies areas requiring additional research and development. It critically reviews the results of cross-linked PE control technology studies, and the development of promising control technologies, including acid, peroxide, radiation and silane cross-linking methods. -
Optical sensitivity of DNA-dispersed single-walled carbon nanotubes within cement composites under mechanical load
Jin Hee Kim, Inkyu Rhee, Yong Chae Jung, Sumin Ha, Yoong Ahm Kim 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 12 90-96 (7 pages)
mechanical load. Deoxyribonucleic acid (DNA) was selected as the dispersing agent to achieve a homogeneous dispersion of SWCNTs in an aqueous solution, and the dispersion state of the SWCNTs were characterized using various optical tools. It was found that the addition of a large amount of DNA prohibited the structural evolution of calcium hydroxide and calcium silicate hydrate. Based on the in-situ Raman and X-ray diffraction studies, it was evident that hydrophilic functional groups within the... -
Improvement of gas sensing properties of carbon nanofibers based on polyacrylonitrile and pitch by steam activation
Jeongsik Kim, Hyung-Il Kim, Jumi Yun 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 5 36-40 (5 pages)
Polyacrylonitrile/pitch nanofibers were prepared by electrospinning as a precursor for a gas sensor material. Pitch nanofibers were properly fabricated by incorporating polyacrylonitrile as an electrospinning supplement component. Polyacrylonitrile/pitch nanofibers were activated with steam at various temperatures followed by subsequent carbonization to make carbon nanofibers with a highly conductive graphitic structure. Steam activation was effective in facilitating gas adsorption onto the...
