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Updated: May 18, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Pickering emulsion stabilized by catalytic polyoxometalate nanoparticles: a new effective medium for oxidation
Loïc Leclercq1, Adrien Mouret, Anna Proust
1Université Lille Nord de France, Université Lille 1, ENSCL, EA 4478, Chimie Moléculaire et Formulation, 59655 Villeneuve d'Ascq Cedex, France.
Abstract:
Decyl-, dodecyl-, and tetradecyltrimethylammonium cations were combined with the catalytic polyoxometalate [PW(12)O(40)](3-) anion to give spherical and monodisperse nanoparticles that are able to stabilize emulsions in the presence of water and an aromatic solvent. This triphasic liquid/solid/liquid system, based on a catalytic surfactant, is particularly efficient as a reaction medium for epoxidation reactions that involve hydrogen peroxide. The reactions proceed at competitive rates with straightforward separation of the phases by centrifugation. Such catalytic "Pickering" emulsions combine the advantages of heterogeneous catalysis and biphasic catalysis without the drawbacks (e.g., catalyst leaching or separation time).
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