SiO2@metal-organic nanosheet core-shell material, preparation process and catalytic performance detection method

Abstract

The invention discloses a SiO2@metal-organic nanosheet core-shell material, a preparation process and a catalytic performance detection method. The preparation method comprises the following steps: (1) by taking a silicon dioxide sphere as a carrier, modifying a carboxylic acid functional group on the surface of the silicon sphere through 3-aminopropyl silane and succinic anhydride; (2) adding carboxylic acid silicon balls into a reaction solution for preparing the zirconium-based nanosheet based on the 1, 3, 5-tri (4-carboxyl phenyl) benzene through an in-situ synthesis method, and realizing loading of the nanosheet on the silicon balls through coordination of carboxylic acid; wherein the prepared composite material is prepared from the following parts in percentage by mass: 74.9 to 89.5% of silicon spheres and 10.5 to 25.1% of MOF nanosheet material.

Description

technical field [0001] The invention relates to material engineering and catalyst technology, in particular to a SiO 2 @ Metal-organic nanosheet core-shell material, preparation process and catalytic performance testing method. Background technique [0002] Ultrathin two-dimensional metal-organic nanosheets (MOFs nanosheets), as an emerging class of highly crystalline porous materials, have broad potential due to their ultrathin thickness, large specific surface area, and abundant active sites distributed on the surface. application, in recent years more and more people's attention (C.Tan, X.Cao, X.J.Wu, Q.He, J.Yang, X.Zhang, J.Chen, W.Zhao, S.Han, G.H.Nam , M. Sindoro, and H. Zhang, Chem. Rev. 2017, 18 117, 6225). In particular, studies have shown that MOFs nanosheets exhibit very high activity and mass transfer rates as catalysts (C.Tan, G.Liu, H.Li, Y.Cui, Y.Liu, Dalton Transactions, 2020, 49, 11073) . In the catalytic process of nanosheets, the reactants interact wi...

AI Technical Summary

Problems solved by technology

Nevertheless, well-exfoliated nanosheets usually have a thickness as low as 1 nm and a very small overall size, and are mostly dispersed in solution as colloids, so as heterogeneous catalytic materials, their recycling rate is low; in addition, although MOFs nano However, due to the small size and thickness, how to further improve the effective collision between substrate molecules and nanosheets has also become a concern.

Images