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Density functional theory study of CH4 and CO2 adsorption by fluorinated graphene
Doh Gyu Hwang, Euigyung Jeong, Seung Geol Lee 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 13 81-85 (5 pages)
..PAGE:1 81 Density functional theory study of CH4 and CO 2 adsorption by fuorinated graphene Doh Gyu Hwang 1, Euigyung Jeong 2 and Seung Geol Lee 1,♠ 1Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea 2Department of Textile System Engineering, Kyungpook National University, Daegu 41566, Korea Received 13 August 2016 Accepted 30 August 2016... proposed and studied to remove greenhouse gases from the atmosphere and protect the environment [3,4]. Carbon-based materials for adsorption are an intriguing subject owing to their very high specific surface area, low weight, and elasticity [5,6]. Among various carbonaceous materials, graphene has attracted much attention from researchers for these reasons; consequently, this material has been empirically and theoretically investigated for possible applications, such as gas sensors [7-10]. -
Preparation of Activated Carbon Fibers from Cost Effective Commercial Textile Grade Acrylic Fibers
MekalaBikshapathi, NishithVerma, RohitashawKumarSingh, HarishChandraJoshi, AnuragSrivastava 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.1 8 44-47 (4 pages)
base material at high temperature. On contrary, N- and H-contents significantly decrease with increasing activation temperature. O-contents increase continually. The reason is attributed to the reaction between the activating agent and carbon matrix, producing oxygenated functional groups, also corroborated by the FTIR spectra discussed later in the manuscript. Therefore, it may be concluded that... -
한국 선사고고학의 방법론적 전망
안승모 한국고고학회 한국고고학전국대회 발표문 22 Pages
한국고고학회 한국고고학전국대회 발표문 제38회 한국고고학대회 1 31-52 (22 pages)
elliptical fourier analysis, functional analysis, microanalysis, multi-criteria decision analysis; trend surface analysis(kriging) - instrumental neutron activation analysis, pXRF 2, dental micro-wear 2, GIS 5, vstable isotopes 18, petrographic analysis, faunal analysis Etc borrowing, enclaves, interpolation, material culture, non-utilitarian, risk, smell .indb 48 14. 11. 3. 오전 10:14 ..PAGE:19... -
Improvement Characteristics of Bio-active Materials Coated Fabric on Rat Muscular Mitochondria
DongheeLee, Young-WonKim, Jung-HaKim, MisukYang, HyemiBae, InjaLim, HyoweonBang, Kyung-ChanGo, Gwang-WungYang, Yong-HwanRho, Hyo-SukPark, E 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.3 14 283-289 (7 pages)
Key Words: Apoptosis, Bio-active materials coated fabric, Mitochondria, Mitophagy, Oxidative respiration INTRODUCTION Recently, the functionalized bio-active textile products have been increasingly develo ped [1-3]. For examples, the use of special silk clothes may be useful in the management of atopic dermatitis in children [4]. Lee et al. [5] showed that multi-functional fabric wear is... This study surveys the improvement characteristics in old-aged muscular mitochondria by bio-active materials coated fabric (BMCF). To observe the effects, the fabric (10 and 30%) was worn to old-aged rat then the oxygen consumption efficiency and copy numbers of mitochondria, and mRNA expression of apoptosis- and mitophagy-related genes were verified. By wearing the BMCF, the oxidative respiration significantly increased when using the 30% materials coated fabric. The mitochondrial DNA copy... -
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)
a multifunctional nanocomposite textile material. J Hazard Mater, 185, 124 (2011). https://doi. org/10.1016/j.jhazmat.2010.09.006. [6] Yang F, Both SK, Yang X, Walboomers XF, Jansen JA. Develop- ment of an electrospun nano-apatite/PCL composite membrane for GTR/GBR application. Acta Biomater, 5, 3295 (2009). https://doi. org/10.1016/j.actbio.2009.05.023. [7] Yoo HS, Kim TG, Park TG.... 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 promising candidate material in the biomedical field for applications such as tissue engineering, wound healing, and drug delivery systems. -
Adsorption characteristics of heavy metals ions by physical activation on coal tar pitch-based activated carbon fibers
Bo-kyung Choi, Jae-Kyoung Ko, Soo-Jin Park, Min-Kang Seo 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 10 96-100 (5 pages)
of the surface functional groups of the ACF surfaces. Thus, the adsorption of Cr(VI) ions tended to increase as a function of contact time. ture. But, the specifc surface area decreased to 1635 m 2/g at the activation time of 60 min. It’s possible that, as the micropore walls were destroyed due to excessive activation, the volume of micropores rapidly decreased and the oxidative reactions... Due to the increasing population growth of modern society, along with rapid industrial development and urbanization, environmental pollution continues to worsen and has become an important issue, not only domestically but also worldwide. In particular, toxic substances such as heavy metal ions are present in the wastewater produced by various industries. This wastewater flows into rivers, pollutes water supplies, and can contaminate the drinking water supplied to people [1-3]. Powder or... -
Three-dimensional porous graphene materials for environmental applications
Muruganantham Rethinasabapathy, Sung-Min Kang, Sung-Chan Jang, Yun Suk Huh 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 1 1-13 (13 pages)
the adsorption capacities of activated carbon. Cong et al. [26] reported the one-step fabrication of macroscopic mul- tifunctional graphene-based hydrogels with functional compo- nents, such as α-FeOOH nanorods and magnetic Fe3O4 nanopar- ticles, by pH control under mild conditions. Such functional graphene-based hydrogels exhibited the excellent adsorption capacities of 139.2 and 373.8 mg g 1... a vital role in science and technology. The ability to control their pore structures at the atomic, molecular, and nanometer scales enable interactions with atoms, ions and molecules to occur throughout the bulk of the material, for practical applications. Three-dimensional (3D) porous carbon-based materials (e.g., graphene aerogels/hydrogels, sponges and foams) made of graphene or graphene oxide-based networks have attracted considerable attention because they offer low density, high porosity,... -
Adsorption capability of activated carbon synthesized from coconut shell
Md Shariful Islam, Bee Chin Ang, Samira Gharehkhani, Amalina Binti, Muhammad Afifi 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 1 1-9 (9 pages)
textile industrial effuents on agricultural land. Indian J Environ Health, 35, 132 (1993). [13] Hosseini S, Khan MA, Malekbala MS, Cheah W, Choong TSY. Carbon coated monolith, a mesoporous material for the removal of methyl orange from aqueous phase: adsorption and desorption studies. Chem Eng J, 171, 1124 (2011). http://doi.org/10.1016/j. cej.2011.05.010. [14] Robinson T, McMullan G, Marchant... perfect crystallite structure. The field emission scanning electron microscopy image showed the presence of well-developed pores on the surface of the activated carbon. The presence of important functional groups was shown by the Fourier transform infrared spectroscopy spectrum. The adsorption of methyl orange onto the activated carbon reached 100% after 12 min. Kinetic analysis indicated that the adsorption of methyl orange solution by the activated carbon followed a pseudo-second-order kinetic... -
A review: synthesis and applications of graphene/chitosan nanocomposites
Hui Yuan, Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 2 11-17 (7 pages)
new type of nanomaterial that combines carbon and the natural polymer. Then new material possesses not only large specifc surface area and good electrical properties, but also specifc functional groups with properties different from those of iron-carbon. Therefore, by creating a composite materi- al, the advantages of both materials can be combined, and is ex- pected to be applied extensively.... physical properties. These outstanding properties have led to its universal use in applications such as textile fabrics, tissue engineering, medicine and health, coatings, and paints. By combining the advantages of GO and CS, different types of promising materials can be obtained. This review discusses the preparation of GO-CS fibers, hydrogel and aerogel, and the applications of GO-CS nanocomposites. In addition, directions for future research on graphene material composites are discussed. -
Potassium hydroxide activation of activated carbon: a commentary
Tang Shu Hui, Muhammad Abbas Ahmad Zaini 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 9 275-280 (6 pages)
prepared by KOH activation is highly microporous when compared to that produced through ZnCl2 or H3PO4 activation [4-6]. Besides, KOH also enhances the specifc surface area and the formation ofOH functional groups on the carbon surface [7]. Over the past 5 years, many advantages of KOH activation have been revealed in the literature [8]. However, the adverse drawbacks of employing KOH have been...