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

doi:10.1016/j.jhazmat.2020.124392

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

J Hazard Mater. 2021 Apr 5:407:124392. doi: 10.1016/j.jhazmat.2020.124392. Epub 2020 Oct 29.

Authors

Canggih Setya Budi¹, Juti Rani Deka², Wan-Chi Hsu¹, Diganta Saikia¹, Ke-Ting Chen¹, Hsien-Ming Kao³, Yung-Chin Yang⁴

Affiliations

¹ Department of Chemistry, National Central University, Chung-Li 32054, Taiwan, ROC.
² Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
³ Department of Chemistry, National Central University, Chung-Li 32054, Taiwan, ROC. Electronic address: hmkao@cc.ncu.edu.tw.
⁴ Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC. Electronic address: ycyang@ntut.edu.tw.

PMID: 33162242
DOI: 10.1016/j.jhazmat.2020.124392

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^-1g_cat^-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^-1g_cat^-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.

Keywords: Cu nanoparticles; Dye reduction; Metal organic frameworks; Nitroarenes; Zeolitic imidazolate frameworks.