Template-Assisted, Seed-Mediated Synthesis of Hierarchically Mesoporous Core-Shell UiO-66: Enhancing Adsorption Capacity and Catalytic Activity through Iterative Growth

Furui Zhang, Xiaobing Hu, Eric W. Roth, Yonghwi Kim, Son Binh T. Nguyen*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

A hierarchically mesoporous (HM) UiO-66-F4 shell with ∼8 nm mesopores can be iteratively grown on top of UiO-66 nanoparticle (NP) seeds over several cycles templated by Pluronic F-127 micelles. Presumably, the Pluronic micelles that were formed in water can surround UiO-66 NPs to facilitate the overgrowth of an HM-UiO-66-F4 shell in the presence of ZrIV precursors and BDC-F4 linkers. The UiO-66 NP seeds play an important role in directing the continuous growth of the HM-UiO-66-F4 shell, as only a nonporous phase was obtained in their absence. This template-assisted, seed-mediated method can be extended to produce other UiO-66-X (X = (OH)2, (COOH)2, etc.) shells, demonstrating its generality for the UiO-66 family of metal-organic frameworks. Notably, the incorporation of mesopores into the thrice-overgrown UiO-66@HM|3rd-UiO-66-F4 materials leads to impressive enhancements in the per-mass uptake capacity of Direct Blue 86, a large anionic dye: 320% better than the parent UiO-66 seeds and 150% better than that for a [UiO-66 + UiO-66-F4] physical mixture at the same mass proportion. Similar enhancements were also observed in the catalyzed oxidation of thioanisole.

Original languageEnglish (US)
Pages (from-to)4292-4302
Number of pages11
JournalChemistry of Materials
Volume32
Issue number10
DOIs
StatePublished - May 26 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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