3D graphenic microporous carbon from zeolite template : synthesis and characterization = 삼차원 구조를 갖는 미세 다공성 그래핀 : 합성과 특성 분석에 관한 연구 synthesis and characterization

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Three-dimensional (3D) graphenic porous carbon has garnered considerable interest as an attractive material for various applications due to the characteristics of graphene combined with a 3D porous structure. Recently, the synthesis of such carbons has been investigated using zeolite as a template. The porous structure of zeolite is suitable for the formation of 3D interconnected single layer graphene without the stacking problem. However, zeolite has narrow micropores that are too small to accommodate large molecular compounds. Small hydrocarbons, such as acetylene and ethylene, therefore have been widely used for carbonization within the zeolite micropores. Carbon synthesis with small hydrocarbon molecules requires high carbonization temperature, inducing non-selective carbon deposition on the external surface of the zeolite. In this thesis, lanthanum-catalyzed synthesis was explored to resolve the problem of zeolite-templating synthesis. The catalytic carbonization occurred at a low temperature, preventing external carbon deposition on the surface of zeolite crystals. X-ray diffraction analysis using single crystal revealed that the resultant carbon had a 3D graphene-like interconnected porous structure. The 3D graphene-like microporous carbon exhibited high conductivity and an ordered microporous structure originated from the zeolite template. Furthermore, the lanthanum-catalyzed synthesis can be applied to small-pore zeolites, which were considered an inadequate template for carbon replication. The resultant carbon had an ordered array of ultramicropores, where the ultramicropore diameter corresponded to the zeolite wall thickness.
Advisors
Ryoo, Ryongresearcher유룡researcher
Description
한국과학기술원 :화학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학과, 2019.2,[ix, 101 p. :]

Keywords

Graphene▼a3D graphenic carbon▼ananoporous carbon▼azeolite▼azeolite-templated carbon; 그래핀▼a삼차원 그래핀▼a나노다공성 탄소▼a제올라이트▼a제올라이트 주형 탄소

URI
http://hdl.handle.net/10203/265472
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842454&flag=dissertation
Appears in Collection
CH-Theses_Ph.D.(박사논문)
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