Synthesis of Two Dimensional Graphene-Spherical Hollow Carbon Composites and Their Application
Synthesis of Two Dimensional Graphene-Spherical Hollow Carbon Composites and Their Application
- 주제(키워드) Graphene , Hollow , Carbon
- 발행기관 아주대학교
- 지도교수 김상욱
- 발행년도 2014
- 학위수여년월 2014. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000016447
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
We reported the synthetic method of graphene-spherical hollow carbon composites using direct synthesized grpahene-mesoporous silica composites from graphite and their application. Using Pluronicⓒ F-127 as a surfactant, exfoliated graphene were dispersed in water and mesoporous silica was made on the graphene surface. We observed the structure and composition of graphene-mesoporous silica composites by using x-ray diffractometry, trasmission electron microscopy, atomic force microscopy, N2 adsorption-desorption analysis and elemental mapping analysis. The graphene-mesoporous silica composites were formed layered mesoporous amorphous silica up on graphene surface. The composites have about 633 m2/g of specific surface area, about 4 nm of pore size, and type VI mesopore. For using this, we synthesized graphene-spherical hollow carbon composites through nanocasting process. We observed that the graphene- spherical hollow carbon composites have high specific surface area (about 1793 m2/g) and bubble-like shape of pore. For its possibility about electrode in supercapacitor, we observed their electrochemical properties. The composites were exhibited 185 F g-1 of specific capacitance in 1 mV s-1 and good cyclic stability during 200 cycles.
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Cover page
Approval page
Abstract __________________________________________ i
Table of Contents __________________________________ ii
List of Schemes_____________________________________ iii
List of Figures _____________________________________ iv
Introduction _______________________________________ 1
Experimental Section _______________________________ 3
Results and Discussion ______________________________ 6
Conclusions _______________________________________ 9
Schemes___________________________________________ 10
Figures____________________________________________ 12
References ________________________________________ 19
