Nanoporous multilayer graphene oxide membrane for desalination = 나노 기공이 도입된 다층 그래핀의 수처리 분리막 응용에 관한 연구

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Bulk scale graphenes containing narrow and dense pores are realized via potassium hydroxide activation of pre-oxidized graphite (size: ca. 3 nm, density: ca. $10^{15} m^{-2}$). A film (20 nm thickness) comprised of this nanoporous graphene displays much enhanced water flux (ca. $37 L \cdot m^{-2} h^{-1} bar^{-1}$) than that of conventional graphene oxide membrane (~ 6 times), as maintaining the sieving performances of GO laminates with ca. 20 % rejection for NaCl and up to 99 % rejection for various dyes around 1 nm diameter size. This advantageous property is a result of the fact that in addition to the effect of the interlayer stacking of graphene sheets, nanopores in the graphene generated by using the new method serve as additional channels through which water molecules can diffuse. We believe that the new approach will play a key role in preparing and designing the graphene membrane with high flux.
Advisors
Jung, Hee-Taeresearcher정희태researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2017.2,[iv, 42 p. :]

Keywords

graphene oxide membrane; nanoporous; desalination; multilayer; dye rejection; 산화 그래핀 분리막; 나노 기공; 해수담수화; 다층구조; 염료 제거

URI
http://hdl.handle.net/10203/243085
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=675596&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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