Hydrophobic and hydrophilic nanosheet catalysts with high catalytic activity and recycling stability through control of the outermost ligand

Younji Ko, Donghee Kim, Cheong Hoon Kwon, Jinhan Cho

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, we introduce hydrophobic and hydrophilic graphene oxide nanosheet (GON) catalysts prepared by consecutive ligand replacement of hydrophobically stabilized magnetic and catalytic nanoparticles (NPs); it exhibits high catalytic activity, fast magnetic response, and good dispersion in both nonpolar and aqueous media, allowing high loading amount of magnetic and catalytic NPs onto GON sheets. More specifically, these GON catalysts showed a high product yield of 66–99% and notable recyclability (93% of the initial product yield after 10 reaction cycles) in a Suzuki–Miyaura reaction in nonpolar media, outperforming the performance of the conventional hydrophilic GON catalysts. Additional coating of a hydrophilic layer onto GON catalysts also showed the notable performance (product yield ∼99%) in catalytic reactions performed in aqueous media. Given that ligand-controlled catalytic NPs adsorbed onto 2D nanosheets can be used as hydrophobic and hydrophilic stabilizers as well as catalysts, our approach can provide a tool for developing and designing 2D-nanosheet catalysts with high performance in nonpolar and polar media.

Original languageEnglish
Pages (from-to)791-802
Number of pages12
JournalApplied Surface Science
Volume436
DOIs
Publication statusPublished - 2018 Apr 1

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Nanosheets
Recycling
Catalyst activity
Graphite
Ligands
Oxides
Graphene
Catalysts
Nanoparticles
Stabilizers (agents)
Coatings

Keywords

  • Hydrophobic/hydrophilic graphene oxide nanosheet
  • Ligand replacement reaction
  • Palladium nanoparticle
  • Suzuki–Miyaura coupling reaction
  • TMB oxidation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Hydrophobic and hydrophilic nanosheet catalysts with high catalytic activity and recycling stability through control of the outermost ligand. / Ko, Younji; Kim, Donghee; Kwon, Cheong Hoon; Cho, Jinhan.

In: Applied Surface Science, Vol. 436, 01.04.2018, p. 791-802.

Research output: Contribution to journalArticle

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