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  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Urea intercalation route for graphitic carbon nitride single layer between layered silicate

2012년 9월 5일 15시 43분 18초
MAT.P-1381 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (수요일) 16:00~19:00
저자 및
김가인, 양재훈, 최진호
이화여자대학교 화학.나노과학과, Korea
A single layer of graphitic carbon nitride was synthesized in the gallery of layered silicates via solid state intercalation and pyrolysis. At first, urea was intercalated into layered silicates via solid state reaction at 150 ℃ for 3 hours. Thus prepared urea-layered silicates nanohybrid was calcinated at 200 ℃ - 550 ℃ for 4 hours in order to polymerize urea in the interlayer of layered silicates. According to the x-ray diffraction analysis, the basal spacing of urea-layered silicates nanohybrid was expanded to 1.86 nm, compared to that of Na+ intercalated layered aluminosilicates (0.96 nm), indicating that urea was successfully intercalated into layered silicates. The basal spacing of the nanohybrid calcined at 550 ℃ was decreased to 1.28 nm, indicating that the urea complexes in the interlayer of silicates were polymerized to form a single sheet of graphitic carbon nitride through the melamine and melem(tri-s-triazine). UV-visible spectra demonstrated that the absorption edge of the calcined nanohybrid was red-shifted and the color was changed from white to pale yellow with increasing the calcination temperature. The nanohybrid calcined at 550 ℃ has bandgap energy of 2.8 eV, which is similar to that of the bulk graphitic carbon nitride. From the FT-IR spectra, we also confirmed that the graphitic carbon nitride was successfully synthesized from the finger print of the aromatic C=N vibration band and the disappearance of C=O vibration bands depending on calcination temperature.