吉林大学于吉红团队报道了一种由链硅酸盐的一维到三维拓扑缩合而实现的三维特大孔沸石。相关研究成果发表在2023年1月20日出版的国际知名学术期刊《科学》。

沸石是一种用作催化剂、吸附剂和阳离子交换剂的微孔硅酸盐。需要增加孔隙率的稳定二氧化硅基沸石，从而吸附和处理大分子，但对合成能力提出了挑战。

研究人员报道了一种新的高度稳定的纯二氧化硅沸石ZEO-3，它具有一个多维的、相互连接的超大孔隙系统，通过16和14硅酸盐四面体（目前已知密度最小的二氧化硅多晶型体）制成的窗口打开。这种沸石是由链状硅酸盐前所未有的一维到三维（1D到3D）拓扑缩合形成的。ZEO-3的比表面积超过1000平方米/克，与其他沸石和金属有机框架相比，ZEO-3在挥发性有机化合物的减少和回收方面具有高性能。

附：英文原文

Title: A 3D extra-large-pore zeolite enabled by 1D-to-3D topotactic condensation of a chain silicate

Author: Jian Li, Zihao Rei Gao, Qing-Fang Lin, Chenxu Liu, Fangxin Gao, Cong Lin, Siyao Zhang, Hua Deng, Alvaro Mayoral, Wei Fan, Song Luo, Xiaobo Chen, Hong He, Miguel A. Camblor, Fei-Jian Chen, Jihong Yu

Issue&Volume: 2023-01-20

Abstract: Zeolites are microporous silicates with a large variety of applications as catalysts, adsorbents, and cation exchangers. Stable silica-based zeolites with increased porosity are in demand to allow adsorption and processing of large molecules but challenge our synthetic ability. We report a new, highly stable pure silica zeolite called ZEO-3, which has a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra, the least dense polymorph of silica known so far. This zeolite was formed by an unprecedented one-dimensional to three-dimensional (1D-to-3D) topotactic condensation of a chain silicate. With a specific surface area of more than 1000 square meters per gram, ZEO-3 showed a high performance for volatile organic compound abatement and recovery compared with other zeolites and metal-organic frameworks.

DOI: ade1771

Source: https://www.science.org/doi/10.1126/science.ade1771