120th General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code INOR.P-33
Subject Preparation and Characterizations of High Surface Few Layer Graphitic Mesoporous Carbon Materials
Authors Hyun-Chul Kim, SEONG HUH*
Department of Chemistry, Hankuk University of Foreign Studies, Korea
Abstract High surface few-layer graphitic mesoporous carbon materials were prepared from the hard templating method without using porous silica hard template. Crystalline mesoporous ZnO/Zn(OH)2 spheres with adequate surface area are used as an acid-labile hard template for carbon materials. Furfuryl alcohol (F) or phloroglucinol (P) were employed as the carbon precursors. In the case of N-doped carbon material, melamine was employed as the nitrogen-dopant source. The basic surfaces of ZnO/Zn(OH)2 are ideal for the polymerization of carbon precursors. After carbonization at 800 °C under N2 flow followed by an acid etching step, pure carbon materials were fabricated. XPS analysis showed that phloroglucinol gave rise to higher oxygen content in carbon material than furfuryl alcohol. These carbon materials are composed of well-interconnected few layer graphitic structures as revealed by HR-TEM and Raman spectroscopy. Gas sorption analysis displays the surface areas are in the range of 1016 and 1060 m2 g-1. N-doped carbon material with BET surface area of 1363 m2 g-1 was also successfully prepared from phloroglucinol and melamine. Hydrogen and carbon dioxide uptake abilities were investigated at 77 K and 196 K, respectively. The N-doped carbon material revealed the highest uptake of H2 (1.69 wt%) and CO2 (367.4 cm3 g-1). They also presented high CO2 adsorption enthalpy values. These carbon-based materials yield high capacitances up to 181.3 F g-1. The N-doped carbon material exhibited capacitance retention of 102.7 % after 2000 cycles. Hence, they can be used as supercapacitors with high stability.
E-mail khc@hufs.ac.kr