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| Type |
Poster Presentation |
| Area |
환경에너지 |
| Room No. |
포스터발표장 |
| Time |
4월 20일 (목요일) 11:00~12:30 |
| Code |
ENVR.P-497 |
| Subject |
Structural engineering of metal free carbon nitride polymers with benzene doping for enhanced photocatalytic activity under visible light |
| Authors |
김혜진, 최원용*
POSTECH 환경공학부, Korea
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| Abstract |
Graphitic carbon nitride (g-C3N4) have attracted much attention as a polymeric visible-light photocatalyst. However, the limited visible light absorption and fast electron-hole recombination have restricted its photocataytic efficiency. To overcome this drawbacks, grafting aromatic groups onto the surface of g-C3N4 is investigated to extend the delocalization of the π electrons and change the intrincic semiconductor properties. Here, we advanced this strategy by synthesizing the carbon nitride substituted nitrogen of tertiary amine to benzene connected by three heptazine rings. The intramolecular benzene doping by simple method induced the structural distortion that is calculated theoretically and when increasing the benzene doping concentration, amorphization is also progressed. This structural changes of carbon nitride bring about remarkably enhanced charge separation of photogenerated electron-hole pairs and red-shift of the optical absorption. As a result, the modified carbon nitride showed increased photocatalytic efficiency on the degradation performance of organic pollutant and hydrogen peroxide generation under the visible light (λ > 420 nm). This study offers simple strategies to induce chemical and structural change of the carbon nitride only consisted of earth-abundant elements for enhanced photocatalytic activity. |
| E-mail |
hjkim21@postech.ac.kr |
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119th General Meeting of the KCS