报告题目

Study on host-guest interaction in porous materials by transmission electron microscopy

报告人

陈晓

报告人单位

清华大学

报告时间

2023年4月7日（周四）15:00—16:00

报告地点

环资楼1楼报告厅

主办单位

合肥微尺度物质科学国家研究中心 国际化学理论中心（ICCT）、化学与材料科学学院

报告介绍

Abstract:

Zeolite molecular sieve is a kind of rigid framework material with ordered microporous structure, which is widely used in many fields such as petrochemical industry, coal chemical industry, carbon dioxide conversion, environmental treatment and gas separation. It uses three-dimensional nanoscale channels (0.3~1.3 nm) to screen molecules of different sizes and precisely control the molecular motion and reaction behavior at the microscopic level, so as to realize the highly selective preparation of high-value-added products. For example, using the pore restriction of ZSM-5 molecular sieve, low olefins and monocyclic aromatics can be obtained with high selectivity, and the formation of larger bicyclic aromatics, coke and other by-products can be inhibited. This is of great significance for carbon reduction in chemical process under the dual-carbon target. In this talk, the first part is the atomic-scale structure study of molecular sieve structure using transmission electron microscopy. The second part is a detailed study of the host-guest interaction between the confined molecules and the molecular sieve framework. The third part is a summary and prospect of different technologies for porous material system[1-5].

References:

[1] Hao Xiong, Xiao Chen*, Fei Wei*, et al. Science. 2022.376, 6592, 491.

[2] Boyuan Shen#,Huiqiu Wang#, Hao Xiong#, Xiao Chen*, Fei Wei*, et al. Nature. 2022.607, 703.

[3] Boyuan Shen, Xiao Chen*, Fei Wei*, et al. Nature. 592, 541, 2021.

[4]Boyuan Shen, Xiao Chen*, Yao Wang*, Fei Wei*, et al. Nat. Commun. 12, 2212, 2021.

[5]Huiqiu Wang, Xiao Chen*, Fei Wei*, Weizhong Qian*, et al. Nat. Commun. 13, 2924，2022.

About the speaker:

陈晓，清华大学化工系助理研究员，2017年博士毕业于大连交通大学，之后在清华大学从事博士后研究工作。近五年内发表文章50余篇，主要工作包括分子筛孔道、MOF骨架结构和限域客体分子的原子尺度解析与催化机理探索, 其中第一作者/通讯作者（共同）10篇，包括 Nature（3篇）、Science（1篇）、Nature Communications（4篇）、Advanced Materials（1篇）和Nano Lett.（1篇）。荣获第三届中国分子筛新秀奖、2022年度清华大学优秀博士后（全校仅十人）以及2022年度《麻省理工科技评论》“35 岁以下科技创新35人（中国区）”。