Hybrid Polymeric Nanostructures Stabilized by Ferric Cations with Photo-Fenton Performance: Implications for Recoverable Multicatalyst Design - Archive ouverte HAL
Article Dans Une Revue ACS Applied Nano Materials Année : 2022

Hybrid Polymeric Nanostructures Stabilized by Ferric Cations with Photo-Fenton Performance: Implications for Recoverable Multicatalyst Design

Résumé

Iron ions, as traditional high-efficiency Fenton reaction catalysts, react with hydrogen peroxide to generate hydroxyl radicals, thereby degrading organic pollutants in wastewater. However, in aqueous solutions, iron ions have a poor chemical stability and are therefore difficult to recover from the reaction medium. We propose that their complexation with double-hydrophilic block copolymers can lead to the formation of nanocatalysts with improved chemical and colloidal stability. Iron ions were added at different molar ratios to a solution of a double-hydrophilic block copolymer, that is, poly(ethylene oxide)-block-poly(acrylic acid) to lead to the formation of colloidal structures. Spontaneous formation of highly monodisperse micelles with a hydrodynamic diameter around 25 nm occurs when the charge ratio between the positive iron ions and the negative PAA polyanions is close to one. By combining several techniques, a precise description of the core–shell architecture was achieved. These structures are chemically stable in the pH range of 3–7 and have been successfully used as photo-Fenton catalysts through the degradation of naphthol blue black. Compared to the traditional homogeneous Fenton reaction, these colloidal structures have improved chemical and colloidal stabilities as well as a higher recyclability.

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Dates et versions

hal-03760215 , version 1 (01-01-2024)

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Liming Peng, Christophe Mingotaud, Florence Benoît-Marquié, Jean-Daniel Marty. Hybrid Polymeric Nanostructures Stabilized by Ferric Cations with Photo-Fenton Performance: Implications for Recoverable Multicatalyst Design. ACS Applied Nano Materials, 2022, ⟨10.1021/acsanm.2c02501⟩. ⟨hal-03760215⟩
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