화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO))
권호 44권 1호
발표분야 기능성 고분자
제목 Graphitic Carbon Nitride with Superior Visible Light Absorption Using Alkali Metal Halide Eutectic Salt
초록 Graphitic carbon nitride(g-CN) has been considered a promising visible light photocatalyst. Despite great chemical/thermal stability and unique electronic properties, pristine g-CN has poor photocatalytic activity under visible light because of limited absorption of visible light and fast charge recombination induced by high density of defects. To overcome these intrinsic problems, we propose a simple method to improve visible light activity of g-CN. Ionothermal approach is employed using eutectic mixtures of LiI:KI and LiBr:KBr. Detailed analyses by XRD, FT-IR, 13C CP-MAS NMR, XPS, UV-Vis spectroscopy, PL spectroscopy indicate that both triazine and heptazine phases are simultaneously formed. Furthermore, cyano group, which induces localization of electrons on g-CN, is also introduced with LiI:KI system without critical structural collapse. These characteristics significantly improve visible light absorption, charge separation and transfer, photocatalytic activity under visible light.
저자 이태규, 김미진, 강희주, 구여진, 김홍식, 박혜진, 정윤진, 전영시
소속 전남대
키워드 g-CN; carbon nitride; photocatalyst; hydrgen evolution; water splitting
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