119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-362
Subject Synthesis and characterization of pore size tailored mesoporous graphene
Authors Rosalynn Nankya, 이지혜, 정 현*
동국대학교 화학과, Korea
Abstract Mesoporous graphene (MG) with tailored pore size was successfully synthesized by three distinctive synthesis processes using soft-template method. First method involved freeze drying of composite gel of graphite oxide (GO) and self-assembled triblock co-polymer (P-123). The second method was performed by hydrothermal treatment of the composite mixed solution. Third method included the addition of sodium hydroxide as a base catalyst to second method. And then, all of the obtained samples were sintered at 700 oC for 3 h under Ar atmosphere. The obtained samples after sintering were denoted as f-MG, h-MG, and h-MG-C, respectively. The synthesized samples were characterized by measurement of X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscope (FE-SEM), high resolution transmission electron microscope (HR-TEM), and elemental analysis. The f-MG, h-MG and h-MG-C have average mesopore size of 11.2, 5.0, and 3.9 nm with approximately full width half maximum (FWHM) values of 17, 7, and 3 nm, respectively by N2-adsorption-desorption isotherm measurements. In case of the hydrothermal method, obtained samples exhibited the narrow pore distribution. Especially that which involved base catalyst showed the narrowest pore size distribution, which might be due to formation of covalent ester bonds between the graphite oxide layers caused by the base catalyst.
E-mail rosalynn34@gmail.com