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Self-assembly of amphiphilic polyoxometalates for the preparation of mesoporous polyoxometalate-titania catalysts

Lookup NU author(s): Dr John ErringtonORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Amphiphilic polyoxometalate (POM) surfactants were prepared by covalently grafting double hydrophobic tails with chain lengths C 12 H 25 , C 14 H 29 , C 16 H 33 or C 18 H 37 onto the lacunary WellsDawson {P 2 W 17 O 61 } headgroup. The critical micelle concentrations (CMCs) of these novel surfactants in aqueous solutions were determined by conductivity, and micelle formation was studied by small angle neutron scattering (SANS). Surprisingly, the amphiphiles with longer hydrophobic tails tend to form less elongated and more globular micelles in water. The self-assembled amphiphilic polyoxometalates were used as templates in the hydrothermal synthesis of mesoporous TiO 2 containing dispersed, immobilised {P 2 W 17 O 61 } units, which showed enhanced activity for the photodegradation of rhodamine B (RhB). The catalyst was recycled eight times with no loss of ef´Čüciency, demonstrating the stability of the hybrid structure. The amphiphilic polyoxometalates, therefore have excellent potential for the synthesis of various types of catalytically active porous materials.


Publication metadata

Author(s): Di A, Schmitt J, Da Silva MA, Hossain KMZ, Mahmoudi N, Errington RJ, Edler KJ

Publication type: Article

Publication status: Published

Journal: Nanoscale

Year: 2020

Volume: 12

Issue: 43

Pages: 22245-22257

Print publication date: 21/11/2020

Online publication date: 27/10/2020

Acceptance date: 22/10/2020

Date deposited: 30/10/2020

ISSN (electronic): 2040-3372

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/D0NR05967F

DOI: 10.1039/D0NR05967F


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Funding

Funder referenceFunder name
654000
SINE2020

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