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학술발표회초록보기

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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The few-layer graphene produced by urea-assisted liquid phase exfoliation of graphite

등록일
2019년 9월 9일 17시 16분 20초
접수번호
2033
발표코드
ELEC.P-450 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Sujin Shim, Tae Hyun Kim*
Department of Chemistry, Soonchunhyang University, Korea
Abstract. In this paper, we developed the method of mass production of few-layer graphene of high quality with low defect using direct shear mixing methods among mechanical exfoliation methods. We also enhanced the effect of exfoliation in water solution by using the inorganic salts urea and effectively achieved exfoliation by re-dispersion the graphene one of the organic solvents N-methyl-2-pyrrolidone (NMP). At this time, the urea acts not only as an assistant material, but also as a stabilizer to help the graphene in water to be dispersed. In this experiment, we found optimal conditions by changing the parameters: mixing time, shearing speed, urea concentration to maximize the concentration, defect, layers of graphene. Graphene produced under these optimal conditions was characterized through UV-vis spectra, Raman spectroscopy, TEM, SEM, and XPS using only the supernatant obtained from the process of centrifugation of 3000 rpm, 15 min. This confirmed that graphene produced through the method presented in this paper produced graphene sheets of high quality of few-layer graphene.

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