苝
超分子化学
堆积
光催化
材料科学
二亚胺
纳米纤维
可见光谱
光化学
取代基
载流子
化学工程
纳米技术
分子
催化作用
化学
有机化学
光电子学
工程类
作者
Jun Wang,Wenxing Shi,Di Liu,Zijian Zhang,Yongfa Zhu,Dong Wang
标识
DOI:10.1016/j.apcatb.2016.09.037
摘要
The development of organic materials for visible light driven photocatalytic is regarded as one of the most promising avenues to solve environment and solar-energy utilization issue. Here, we present that one-dimensional supramolecular organic nanofibers, self-assembled by a carboxy-substituent perylene diimide (PDI) molecule through H-type π-π stacking and hydrogen bonding, can act as a robust and effective photocatalyst for both organic pollutants degradation and water oxidation under visible light without the apparent need for an added metal co-catalysts. We corroborate that the highly efficient and stable activity of such supramolecar photocatalyst are attributed to the introduction of terminal carboxyl group, which leads to well-defined and stable H-type π-π stacking, and constructs the internal electric field in supramolecular nanofibers, thereby resulting in the deepening of valence band (VB) and the enhancement of migration and separation efficiency of photo-induced charge carriers. Our findings may help the development of semiconducting-based organic supramolecular materials for applications in environment protection and water splitting.
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