Issue 30, 2021

Thin ZIF-8 nanosheets synthesized in hydrophilic TRAPs

Abstract

The preparation method of nanosheets using hyperswollen lyotropic lamellar phases, the ‘two-dimensional reactor in amphiphilic phases (TRAP) method’, has successfully provided nanosheets of various non-layered materials. Previously reported examples started from a single hydrophobic or hydrophilic precursor and multiple hydrophobic precursors. Here, we propose a synthesis method of nanosheets of ZIF-8, zinc 2-methylimidazolate, with a sodalite-like framework. They grow up to a few nanometers of thickness and several hundred nanometers of width with neither aggregation nor impurities from multiple hydrophilic precursors in the stoichiometric ratio inside the hydrophilic TRAPs consisting of the amphiphile Brij L4. The thin nanosheets of ZIF-8 doped with Co2+ (Co-ZIF-8) synthesized by the same method maintained a high specific surface area after calcination. Therefore, the oxygen reduction reaction (ORR) activity of the calcined Co-ZIF-8 NSs for fuel cells becomes higher than that of the calcined conventional Co-ZIF-8 crystals.

Graphical abstract: Thin ZIF-8 nanosheets synthesized in hydrophilic TRAPs

Supplementary files

Article information

Article type
Paper
Submitted
10 Maijs 2021
Accepted
21 Jūn. 2021
First published
12 Jūl. 2021

Dalton Trans., 2021,50, 10394-10399

Author version available

Thin ZIF-8 nanosheets synthesized in hydrophilic TRAPs

K. Sasaki, T. Okue, Y. Shu, K. Miyake, Y. Uchida and N. Nishiyama, Dalton Trans., 2021, 50, 10394 DOI: 10.1039/D1DT01507A

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