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

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Study on the Tungsten Oxide Immobilized in Nitrogen-doped Mesoporous Graphene (NMG/WO3) nanohybrid

등록일
2019년 8월 29일 16시 49분 38초
접수번호
1875
발표코드
MAT.P-387 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Material Chemistry
저자 및
공동저자
Yein Kang, Hyun Jung*
Department of Chemistry, Dongguk University, Korea
Tungsten oxide (WO3) was successfully immobilized in nitrogen-doped mesoporous graphene (NMG/WO3). Tungstate solution precursor was produced by 25 mM of sodium tungstate under acidic aqueous condition (pH 1.67). Tungstate ion having negative charge can interact with positive charge of N+ site in acid by electrostatic attraction. After annealing at 300 ℃, WO3 can be obtained. The characterization of NMG/WO3 nanohybrid was performed by X-ray diffraction (XRD) pattern and field emission-scanning electron microscope (FE-SEM). It has large surface area (396 m2∙g-1) and mesopore (9.53 nm). Amount of WO3 in composite was estimated by measuring thermal gravimetric analysis (TGA) for 30.08 wt%. To preliminary test the electrochemical performance of NMG/WO3 nanohybrid as supercapacitor, cyclic voltammetry (CV), galvanostatic charge-discharge (CD) were evaluated in three-electrode system with 6.0 M KOH aqueous solution. The specific capacitance of a nanohybrid is 70 F∙g-1 at a current density of 3.0 A∙g-1 and has excellent cyclic stability showing capacitance retention approximately 96 % over 5,000 cycles.

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