Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO2 Capture Applications,ChemistrySelect

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Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO2 Capture Applications
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-01-11 , DOI: 10.1002/slct.201702114
Xukun Qian ₁ , Qingbao Ren ₁ , Xiaofei Wu ₁ , Jing Sun ₂ , Hongyu Wu ₁ , Jun Lei ₁

Affiliation

In this work, the water stability of zeolitic imidazolate framework‐67 (ZIF‐67) is successfully enhanced by Zn‐doping during the crystallization process. Both elemental mapping analysis and X‐ray diffraction (XRD) results reveal that Zn element is doped in the ZIF‐67’s crystals. The thermal stability, surface area and CO₂ capacity are not significantly affected by Zn‐doping as evidenced by thermogravimetric analysis (TGA) and gas sorption. When exposed to liquid water, the doped ZIF‐67 s show better stability in terms of crystal structure, morphology, surface area and CO₂ uptake capacity. However, the undoped ZIF‐67 crystals collapse and nearly lose their porosity as well as CO₂ uptake capacity after the same exposure. This study provides a new approach to enhance the water stability of ZIF‐67.

中文翻译：

Zn掺杂的沸石咪唑啉骨架67（ZIF-67）中增强的水稳定性，可用于二氧化碳捕集应用

在这项工作中，通过在结晶过程中掺杂锌，可以成功地提高沸石咪唑酸盐骨架67（ZIF-67）的水稳定性。元素图谱分析和X射线衍射（XRD）结果均表明Zn元素掺杂在ZIF-67的晶体中。热重分析（TGA）和气体吸附证明，Zn掺杂对热稳定性，表面积和CO ₂容量没有显着影响。当暴露在液态水中时，掺杂的ZIF-67 s在晶体结构，形态，表面积和CO ₂吸收能力方面表现出更好的稳定性。但是，未掺杂的ZIF-67晶体会塌陷，几乎失去其孔隙度以及CO ₂相同暴露后的吸收能力。这项研究提供了一种新的方法来增强ZIF-67的水稳定性。

更新日期：2018-01-11

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