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

Di, Andi ; Schmitt, Julien LU ; da Silva, Marcelo Alves ; Hossain, Kazi M. Zakir ; Mahmoudi, Najet LU ; Errington, R. John and Edler, Karen J. LU orcid (2020) In Nanoscale 12(43). p.22245-22257
Abstract

Amphiphilic polyoxometalate (POM) surfactants were prepared by covalently grafting double hydrophobic tails with chain lengths C12H25, C14H29, C16H33 or C18H37 onto the lacunary Wells-Dawson {P2W17O61} 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 TiO2 containing dispersed, immobilised {P2W17O61} units, which showed enhanced activity for... (More)

Amphiphilic polyoxometalate (POM) surfactants were prepared by covalently grafting double hydrophobic tails with chain lengths C12H25, C14H29, C16H33 or C18H37 onto the lacunary Wells-Dawson {P2W17O61} 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 TiO2 containing dispersed, immobilised {P2W17O61} units, which showed enhanced activity for the photodegradation of rhodamine B (RhB). The catalyst was recycled eight times with no loss of efficiency, 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.

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author
; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Nanoscale
volume
12
issue
43
pages
13 pages
publisher
Royal Society of Chemistry
external identifiers
  • pmid:33141144
  • scopus:85096133179
ISSN
2040-3364
DOI
10.1039/d0nr05967f
language
English
LU publication?
no
additional info
Publisher Copyright: © The Royal Society of Chemistry.
id
8e26d263-b113-497f-a080-300bace3b0e8
date added to LUP
2022-07-12 15:56:40
date last changed
2024-06-11 15:22:57
@article{8e26d263-b113-497f-a080-300bace3b0e8,
  abstract     = {{<p>Amphiphilic polyoxometalate (POM) surfactants were prepared by covalently grafting double hydrophobic tails with chain lengths C12H25, C14H29, C16H33 or C18H37 onto the lacunary Wells-Dawson {P2W17O61} 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 TiO2 containing dispersed, immobilised {P2W17O61} units, which showed enhanced activity for the photodegradation of rhodamine B (RhB). The catalyst was recycled eight times with no loss of efficiency, 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.</p>}},
  author       = {{Di, Andi and Schmitt, Julien and da Silva, Marcelo Alves and Hossain, Kazi M. Zakir and Mahmoudi, Najet and Errington, R. John and Edler, Karen J.}},
  issn         = {{2040-3364}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{43}},
  pages        = {{22245--22257}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Nanoscale}},
  title        = {{Self-assembly of amphiphilic polyoxometalates for the preparation of mesoporous polyoxometalate-titania catalysts}},
  url          = {{http://dx.doi.org/10.1039/d0nr05967f}},
  doi          = {{10.1039/d0nr05967f}},
  volume       = {{12}},
  year         = {{2020}},
}