Bimetallic Co/Zn zeolitic imidazolate framework ZIF-67 supported Cu nanoparticles: An excellent catalyst for reduction of synthetic dyes and nitroarenes

Canggih Setya Budi, Juti Rani Deka, Wan Chi Hsu, Diganta Saikia, Ke Ting Chen, Hsien Ming Kao, Yung Chin Yang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

In this study, a sub-class of microporous crystalline metal organic frameworks (MOFs) with zeolite-like configurations, i.e., zeolitic imidazolate frameworks of single node ZIF-67 and binary nodes ZIF-Co/Zn are used as the supports to develop Cu nanoparticles based nanocatalysts. Their catalytic activities are comparatively evaluated where Cu(x)@ZIF-Co/Zn exhibits better performances than Cu(x)@ZIF-67 in the reduction of synthetic dyes and nitroarenes. For instance, the Cu(0.25)@ZIF-Co/Zn catalyst shows an excellent reaction rate of 2.088 × 10−2 s−1 and an outstanding activity of 104.4 s−1 gcat−1 for the reduction of methyl orange. The same catalyst also performs an exceptional catalytic activity in the hydrogenation of p-nitrophenol to p-aminophenol with the activity of 216.5 s−1 gcat−1. A synergistic role of unique electronic properties rising from the direct contact of Cu NPs with the bimetallic nodes ZIF-Co/Zn, higher surface area of support, appropriate Cu loading and maintainable microporous frameworks with higher thermal and hydrolytic stability collectively enhances the catalytic activity of Cu(x)@ZIF-Co/Zn. Moreover, this catalyst shows excellent stability and recyclability, which can retain high conversion after reuse for 10 cycles.

Original languageEnglish
Article number124392
JournalJournal of Hazardous Materials
Volume407
DOIs
StatePublished - 5 Apr 2021

Keywords

  • Cu nanoparticles
  • Dye reduction
  • Metal organic frameworks
  • Nitroarenes
  • Zeolitic imidazolate frameworks

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