Specific anion effects on the stability of zeolitic imidazolate framework-8 in aqueous solution

Huan Wang, Meipeng Jian, Zenglu Qi, Yongfeng Li, Ruiping Liu, Jiuhui Qu, Xiwang Zhang

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21 Citations (Scopus)

Abstract

In this study, the stability of zeolitic imidazolate framework-8 (ZIF-8) was investigated in 7 common anions aqueous solutions. Experimental results showed that Cl, SO4 2−, NO3 , PO4 3−, and CO3 2− have insignificant change in the crystallinity and permanent porosity of ZIF-8 by SEM, XRD, nitrogen sorption and dissolution of Zn and 2-methylimidazole (Hmim) characterizations. Nevertheless, ZIF-8 crystalline phase and its porous character are transformed by the presence of HCO3 and HPO4 2−.The dissolution of Zn and Hmim underwent a process of a giant ascent at the first stage and a following drop until a steady state in the two mediums. On the other hand, the morphology of ZIF-8 and the XRD peaks changes apparently in the both solutions. However, ZIF-8 possesses a higher stability when Hmim is introduced in the solution due to the inhibiting re-dissolution of ZIF-8 in the two solutions.

Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume259
DOIs
Publication statusPublished - 15 Mar 2018

Keywords

  • 2-methylimidazole
  • Anions
  • Stability
  • Zeolitic imidazolate framework-8

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