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Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption

Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption
Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption
Metal oxides can be used as hard sacrificial templates for the preparation of multifunctional core–shell MOF-based composites following reaction with an organic linker. This is a facile method, but often structures of well-defined shape are only obtained under narrow ranges of conditions, the shape can be lost completely and low levels of MOF conversion observed. Using the prototypical framework ZIF-8 we present an alternative surfactant-assisted surface passivation strategy where the ZnO precursor particles are first coated with a guanidinium-based amphiphile. The surfactant interacts strongly with the oxide surface and allows fine-tuning of the release of Zn(II) and ZIF-8 nucleation by the level of surface coverage permitting a range of well-defined ZnO@ZIF-8 core–shell architectures to be prepared including in water. Further, selective base-etching of the oxide core provides facile access to hollow ZIF-8 and yolk–shell structures. We also demonstrate enhanced dye adsorption and recovery from aqueous mixtures using ZnO@ZIF-8 composite microsphere
2050-7488
13509-13518
El-Hankari, Samir
553903b7-2f34-4dcd-bd0a-cb0014eb4139
Aguilera-Sigalat, Jordi
56421714-a157-49d4-90fc-31b34a148e85
Bradshaw, Darren
7677b11e-1961-447e-b9ba-4847a74bd4dd
El-Hankari, Samir
553903b7-2f34-4dcd-bd0a-cb0014eb4139
Aguilera-Sigalat, Jordi
56421714-a157-49d4-90fc-31b34a148e85
Bradshaw, Darren
7677b11e-1961-447e-b9ba-4847a74bd4dd

El-Hankari, Samir, Aguilera-Sigalat, Jordi and Bradshaw, Darren (2016) Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption. Journal of Materials Chemistry A, 4 (35), 13509-13518. (doi:10.1039/C6TA05893K).

Record type: Article

Abstract

Metal oxides can be used as hard sacrificial templates for the preparation of multifunctional core–shell MOF-based composites following reaction with an organic linker. This is a facile method, but often structures of well-defined shape are only obtained under narrow ranges of conditions, the shape can be lost completely and low levels of MOF conversion observed. Using the prototypical framework ZIF-8 we present an alternative surfactant-assisted surface passivation strategy where the ZnO precursor particles are first coated with a guanidinium-based amphiphile. The surfactant interacts strongly with the oxide surface and allows fine-tuning of the release of Zn(II) and ZIF-8 nucleation by the level of surface coverage permitting a range of well-defined ZnO@ZIF-8 core–shell architectures to be prepared including in water. Further, selective base-etching of the oxide core provides facile access to hollow ZIF-8 and yolk–shell structures. We also demonstrate enhanced dye adsorption and recovery from aqueous mixtures using ZnO@ZIF-8 composite microsphere

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Accepted/In Press date: 11 August 2016
e-pub ahead of print date: 12 August 2016
Published date: 12 August 2016
Organisations: Organic Chemistry: SCF

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Local EPrints ID: 402125
URI: http://eprints.soton.ac.uk/id/eprint/402125
ISSN: 2050-7488
PURE UUID: 1e5b7c54-33a6-4495-aff6-425616acaa33
ORCID for Darren Bradshaw: ORCID iD orcid.org/0000-0001-5258-6224

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Date deposited: 31 Oct 2016 14:40
Last modified: 15 Mar 2024 06:01

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Contributors

Author: Samir El-Hankari
Author: Jordi Aguilera-Sigalat
Author: Darren Bradshaw ORCID iD

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