通过引入双连续性半结构来提高共价有机框架中内部催化位点的可访问性
Yamei Liu1,2,3, Qin Zhou4, Hongde Yu5
1School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Key Laboratory of Green and High-End Utilization of Salt Lake Resources (Chinese Academy of Sciences), Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Angewandte Chemie (International ed. in English)
|February 14, 2024
概括
研究人员使用区块共聚合物策略创建了具有连续介质通道的新型共价有机框架 (COF). 这些层次的多孔COF在催化NO去除方面表现出色,提高了活跃站点的可访问性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 催化剂是一种催化剂.
背景情况:
- 联有机框架 (COFs) 提供可调节的特性,但由于其微孔性质,通常会受到内部活跃站点的有限可访问性的影响.
- 开发引入COF中连续介质通道的策略对于提高质量运输和催化效率至关重要.
研究的目的:
- 为了合成具有有序双连续半层结构和等级性多孔性的COF.
- 研究这种层次结构对催化性能的影响,特别是可见光驱动的NO去除.
主要方法:
- 一个块共聚合物自组装引导的纳米造策略被用于COF合成.
- 合成了三种不同的中介结构的COF,包括共价三酶框架和一个与乙烯结合的COF.
- 由此产生的材料以其有序转移的双钻石 (SDD) 中介通道的等级化中介/微孔结构为特征.
主要成果:
- 成功合成了具有有序双连续半层结构和分层半层/微孔结构的COF.
- 层次的多孔结构促进了高效的孔电子分离和COF内部的质量传输.
- 合成的COF在可见光驱动的催化NO去除中表现出色,达到高达51.4%的转化.
结论:
- 本研究介绍了首次成功地将双连续结构引入COF中,从而创建分层多孔材料.
- 这些新型COF中增强的质量运输和活跃地点的可访问性导致了对NO消除的卓越光催化活性.
- 这项工作为设计具有更好的催化功能的先进多孔材料开辟了新的途径.
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