121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-518
Subject Adsorption Characteristics of N2, H2, CO2, O2 on Modified Graphene Oxide by Potassium Hydroxide
Authors Sang Moon Lee, Won Gi Hong, Jin Bae Lee, Hae Jin Kim*
Electron Microscopy Research Center, Korea Basic Science Institute, Korea
Abstract Activated carbon adsorbents are one of the most extensively used materials for gas adsorption. Carbon dioxide and hydrogen gas storage technology based on physisorption of gases has gained considerable interest in recent years. While most of the recent study focuses on enhancing the adsorption capacity, there is still insufficiency of understanding of the fundamentals involved in such gas adsorption process. Graphene has a theoretical surface area of 2630m2/g and a very high intrinsic electrical conductivity in plane as well as high mechanical strength and chemical stability. Graphene-based material derived from graphite oxide(GO) is now being manufactured in ton quantities at low cost. Here, we report a simple modification with KOH of microwave reduced GO(MrGO). We prepared MrGO powders by irradiating GO in microwave oven. The as-made MrGO powder was then placed in KOH solution, followed by filtration and drying, to form a MrGO/KOH mixtures for chemical modification. MrGO/KOH mixture was put in a tube furnace under flowing nitrogen and heated at 1073K for 1hr. KOH activation has been extensively used to obtain porous carbons and improved porosity and enhanced adsorption performance were reported. Gas adsorption study of modified GO was performed with the observation of adsorption-desorption isotherms of nitrogen, hydrogen, carbon dioxide, oxygen gas.
E-mail leechem1@hanmail.net