A new strategy for the fabrication of covalent organic framework‐metal‐organic framework hybrids via in‐situ functionalization of ligands for improved hydrogen evolution reaction activity
A new strategy for the fabrication of covalent organic framework‐metal‐organic framework hybrids via in‐situ functionalization of ligands for improved hydrogen evolution reaction activity
复制标题
钯催化乙烯基苯并恶嗪酮的对映选择性线性烯丙基烷基化：内球机制。
DOI：
10.1016/s1872
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zou Jianping
中科院分区：
文献类型：
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作者：
Zheng Lingling;Zhang Longshuai;Chen Ying;Tian Lei;Jiang Xunheng;Chen Lisha;Xing Qiuju;Liu Xiaozhen;Wu Daishe;Zou Jianping
新型多孔材料在诸多领域具有广阔的应用前景, 其发展引起了研究者较大关注.本研究通过原位配体自组装的方法，设计了一种新型的共价有机框架-金属-有机框架（COF-MOF）材料。原位改性的配体不仅作为Ti-MOF的成核位点，而且还作为快速传输光生电子的通道，而无需引入额外的化学键。B-Ti-MOF（1：1）的光催化产氢速率为1975 μmol·g-1·h-1，表观量子效率为4.76%，是纯CTF-1的11.8倍.此外，与通过分离配体制备的样品（CTF‐1/Ti‐MOF）相比，B‐CTF‐Ti‐MOF表现出优异的活性和稳定性。最后，结合电化学测试和光谱分析结果，提出了合理的光催化机理。该研究为制备高效、稳定、性能优异的COF/MOF材料提供了一种通用的方法。
The development of novel porous materials have attracted significant attention owing to its possible application in several fields. In this study, we designed a novel covalent organic framework‐ metal‐organic framework(COF‐MOF) material through an in‐situ ligand self‐assembly method. The in‐situ modified ligands not only act as nucleation sites to form Ti‐MOF, but also as a channel to rapidly transfer photogenerated electrons without introducing additional chemical bonds. The photocatalytic hydrogen production rate achieved over B‐CTF‐Ti‐MOF(1:1) was 1975 μmol·g~(-1)·h~(-1) with an apparent quantum efficiency of 4.76%, which is 11.8 times higher than that of the pure CTF‐1. In addition, compared with the sample prepared by separating the ligands(CTF‐1/Ti‐MOF), B‐CTF‐Ti‐MOF shows excellent activity and stability. Finally, a reasonable photocatalytic mechanism was proposed using the results of electrochemical tests and spectral analyses. This study provides a universal method for the construction of highly efficient and stable COF/MOF materials with excellent properties.