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학술지 Agent-Free Synthesis of Graphene Oxide/Transition Metal Oxide Composites and its Application for Hydrogen Storage
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저자
홍원기, 김병훈, 이상문, 유한영, 윤용주, 전용석, 이진배, 김해진
발행일
201205
출처
International Journal of Hydrogen Energy, v.37 no.9, pp.7594-7599
ISSN
0360-3199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.ijhydene.2012.02.010
협약과제
12SF1500, 특이질병 진단 센싱 어레이 셀칩 및 송수신 기술(총괄과제명 : 생체진단 가능 시각/미각 수용체 기반 센싱 기술 개발), 송기봉
초록
Graphene oxide (GO) wrapped transition metal oxide composite materials were synthesized by a very simple route without any additional agents and the hydrogen adsorption properties of the materials were investigated. The morphologies of GO/V2O5 and GO/TiO2 were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that single- or few-layered GO sheets wrapped throughout the V2O5 and TiO2 particles. According to X-ray photoelectron spectroscopy (XPS), the C-OH species of GO and the surface-adsorbed oxygen of the transition metal oxide bond together via a dehydration reaction. The wrapping phenomenon of GO causes the enhancement of hydrogen storage capacity at liquid nitrogen temperature (77 K) compared with those of the pristine transition metal oxides and GO. The enhancement of hydrogen storage capacity of GO-wrapped transition metal oxide composite materials results from the existence of interspaces between the transition metal oxide particles and the thin GO layers. Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
키워드
Dehydration reaction, Graphene oxide, Hydrogen storage, Transition metal oxide, Wrapping
KSP 제안 키워드
77 K, Adsorbed oxygen, Agent-free, Composite materials, Dehydration reaction, GO sheets, Graphene oxide(GOS), Hydrogen Energy, Hydrogen adsorption properties, Hydrogen storage capacity, Liquid nitrogen temperature