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| Type |
Poster Presentation |
| Area |
환경에너지 |
| Room No. |
포스터발표장 |
| Time |
4월 20일 (목요일) 11:00~12:30 |
| Code |
ENVR.P-499 |
| Subject |
New Type of Metal Chelating Coordination Sites in Polymeric Carbon Nitride: Enhanced and Stable Photocatalytic Activities Under Visible Light |
| Authors |
최치훈, Lihua Lin1, 김수지2, 김형준3, Xinchen Wang1, 최원용4,*
POSTECH 화학공학과, Korea
1Fuzhou University College of Chemistry, China
2KAIST EEWS, Korea
3KAIST EEWS대학원, Korea
4POSTECH 환경공학부, Korea
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| Abstract |
We report a novel and simple approach to introduce a new kind of metal coordination site in polymeric carbon nitride (CN) by a simple keto-enol cyclization route of acetylacetone and urea, which results in the successful incorporation of metal chelating pyrimidine derivative into the molecular framework of CN. Further introduction of various metals into this coordination site induced significant enhancements in visible light photocatalytic activities as compared to those of pure carbon nitride and the conventional “nitrogen pot” metal-coordinated carbon nitride. It should be noted that the optimized metal loading on carbon nitride was as low as ~0.16 wt %, which is markedly lower as compared to any metal-incorporated CN catalysts reported in the literature. The photocatalyst activities were assessed for both 4-chlorophenol (4-CP) degradation and H2 production under visible light (λ>420). The Al-functionalized CN displayed the significantly higher activity of 4-CP removal and mineralization as compared to pure CN and other kinds of metal ions incorporation (e.g., Li+, Mg2+, Ta5+) exhibited similar results. On the other hand, the photocatalytic activity for H2 production sensitively depended on the kind of metal ion incorporated and the Li-incorporated samples showed the highest activity. |
| E-mail |
exonian@postech.ac.kr |
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119th General Meeting of the KCS