4.7 Article

Ethylenediamine-entrapped defective UiO-66(Zr) frameworks for improved CO2 adsorption and selectivity

期刊

INORGANIC CHEMISTRY COMMUNICATIONS
卷 158, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.inoche.2023.111476

关键词

CO 2 adsorption; UiO-66; Selectivity; Dynamic flow adsorption; Ethylenediamine

向作者/读者索取更多资源

In this study, ethylenediamine was encapsulated into defective UiO-66(Zr) frameworks to create an improved CO2 adsorbent. The results showed that the defective UiO-66(Zr) framework had increased porosity and exposed unsaturated sites, facilitating the grafting of ethylenediamine. Gas adsorption experiments revealed that the ethylenediamine encapsulated UiO exhibited significantly enhanced CO2 performance compared to the pristine MOF.
In this work, ethylenediamine was entrapped to defected UiO-66(Zr) frameworks to harvest defective amine@UiO-66(Zr) adsorbent (ED@DUiO) that showed improved CO2 performance and good renewability owing to a synergetic effect of creating defects and introducing amine molecules. The UiO-66(Zr) framework was in-situ modified using an acetic acid modulator, followed by grafting of ethylenediamine into the defected UiO-66 (Zr) in n-hexane media. Results indicated that the defected UiO-66(Zr) framework had enhanced porosity and exposed more coordinatively unsaturated sites of Zr4+, favouring grafting amine molecules. Gas adsorption experiments revealed that ED@UiO exhibited significantly enhanced CO2 performance compared to the pristine MOF. At 25 degrees C and 100 kPa, the optimized ED@DUiO entrapped with -38.3 wt% amines exhibited a CO2- absorbing amount of -3.48 mmol/g, and IAST-CO2/CO and CO2/N2 selectivity of -46 and -78, respectively. Furthermore, the defected UiO-66 entrapped with ethylenediamine exhibited good separation of CO2 in the mixture with CO or N2 under dynamic flow adsorption conditions. The study provides a new strategy combining engineering defects and grafting alkylamine within MOF, which is a promising strategy for developing CO2-se-lective adsorbent materials.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据