二维金属有机骨架的合成、结构与应用

Synthesis,Structure and Application of Two-Dimensional Metal Organic Framework

二维金属有机骨架(2D MOF)与三维金属有机骨架(3D MOF)相比,2D MOF具有超薄的厚度和较大的横向尺寸、表面积,这些优点使得2D MOF在物质的传输过程中具有低阻力和高通量的特点;2D MOF超大的比表面积使反应物分子容易接触到更多的活性位点,从而提高了催化活性。正是由于这些优势使得2D MOF迎来了一股新的热潮。首先介绍了2D MOF的两大类合成方法:自上而下和自底向上,自上而下主要是依靠外力的作用对块状MOF进行剥离,而自底向上是通过金属簇与配体直接合成2D MOF纳米片。随后分析2D MOF的拓扑网络结构,通过表征的手段展现出优异的性能。然后,根据其所具有的性能阐述了MOF纳米片在催化、传感、气体分离上的应用。最后对2D MOF进行了展望。

The two-dimensional metal organic framework(2D MOF)with the ultra-thin thickness and the large transverse size and the surface area presents the low resistance and high throughput in the process of material transport in comparison with 3D MOF.The catalytic activity of catalyst with 2D MOF can be significantly improved due to its exposure to more active sites.In recent years,the two-dimensional metal organic framework has received considerable attentions because of its potential applications.In this review,two kinds of synthesis methods of 2D MOF including top-down and bottom-up,are introduced.The 2D MOF is fabricated by the role of external forces to exfoliate the block MOF in top-down method,while 2D MOF nanosheets directly synthesize through metal clusters and ligands in the bottom-up.It is found that the excellent performance of 2D MOF is related to topology network structure,and different structures exhibit different porosity and stability.Then,the application of MOF nanoplates in catalysis,sensing and gas separation are described according to its properties.Finally,the prospect of 2D MOF is given.