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ZIF-8 self-etching method for Au/Polydopamine hybrid cubic microcapsules with modulating nanostructures

Abstract

Metal-organic framework (MOF) derived nanostructures exhibit wonderful characteristics and possess broad application by modulating the complex composition and inner nanostructure. Although various MOF based nanocomposites have been successfully developed, a facile method that can easily turn the structure dependent chemical component of the MOF derived hybrids remains a challenge. By coating the zeolitic imidazolate framework-8 (ZIF-8) with Au/Polydopamine (Au/PDA) via a in situ redox-oxidize polymerization of HAuCl4 and dopamine, this work found the ZIF-8 templates were simultaneously etched off to give Au/PDA hybrid microcapsules with a cubic shape. This one-step sacrifice templating process followed a competing chelating between gold ions and Zn2+ cations to 2-methylimidazole and PDA, thus both the hollow and yolk-like hybrid cubic microcapsules were controllably obtained by varying the synthetic dynamics. Owing to the hollow nature, penetrated PDA shell, well-distribute Au nanocrystals, and unique stable nanostructure, the non-spherical Au/PDA hybrid cubic microcapsules showed high performance in catalyzing the reduction of 4-nitrophenol as well as adsorption/releasing of ibuprofen as a model drug. Moreover, this simple strategy offers a controllable design in developing multifunctional nanocomposites with definite inner nanostructure and activities for nanocatalysis, drug delivery, and energy storage etc.

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Publication details

The article was received on 10 Sep 2019, accepted on 08 Oct 2019 and first published on 10 Oct 2019


Article type: Paper
DOI: 10.1039/C9CE01426H
CrystEngComm, 2019, Accepted Manuscript

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    ZIF-8 self-etching method for Au/Polydopamine hybrid cubic microcapsules with modulating nanostructures

    Q. Fang, Y. Sun, J. Duan, L. Bai, K. Xu, Q. Xiong, H. Xu, K. C. F. Leung, A. Hui and S. Xuan, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE01426H

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