ZIF-8 self-etching method for Au/polydopamine hybrid cubic microcapsules with modulated nanostructures

Qunling Fang*, Yuhang Sun, Jinyu Duan, Linfeng Bai, Kezhu Xu, Qinshan Xiong, Huajian Xu, Ken C F LEUNG, Ailing Hui, Shouhu Xuan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Metal-organic framework (MOF)-derived nanostructures exhibit wonderful characteristics and possess broad application potential by modulating the complex composition and inner nanostructure. Although various MOF-based nanocomposites have been successfully developed, a facile method that can easily modulate the structure-dependent chemical components of the MOF-derived hybrids remains a challenge. By coating zeolitic imidazolate framework-8 (ZIF-8) with Au/polydopamine (Au/PDA) via in situ redox-oxidation polymerization of HAuCl4 and dopamine, it was found that the ZIF-8 templates were simultaneously etched off to give Au/PDA hybrid microcapsules with a cubic shape. This one-step sacrificial templating process followed a competing chelation between gold ions and Zn2+ cations to 2-methylimidazole and PDA; thus, both the hollow and the yolk-like hybrid cubic microcapsules were controllably obtained by varying the synthetic dynamics. Owing to the hollow nature, penetrated PDA shell, well-distributed 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/release of ibuprofen as a model drug. Moreover, this simple strategy offers a controllable design in developing multifunctional nanocomposites with definite inner nanostructures and activities for nanocatalysis, drug delivery, energy storage etc.

Original languageEnglish
Pages (from-to)6935-6944
Number of pages10
JournalCrystEngComm
Volume21
Issue number45
DOIs
Publication statusPublished - 2019

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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