The addition of cerium oxide to bioactive glasses, important materials for bone tissue regeneration, has been shown to induce multifunctionality, combining a significant bioactivity with antioxidant properties. We provide a real time investigation of the evolution of the electronic properties of highly diluted cerium ions in a liquid environment containing hydrogen peroxide - the most abundant reactive oxygen species in living cells. This challenging task is undertaken by means of high-energy resolution fluorescence detected by X-ray absorption near-edge spectroscopy at the Ce L-3 edge. We investigate samples with variable compositions and different morphologies. We relate the observed spectroscopic changes not only to variations in the concentration of the two Ce oxidation states in the samples, but also to changes in the local atomic environment of Ce ions, providing a clear picture of the role of cerium ions in the dissociation of hydrogen peroxide. The obtained results contribute to the understanding of the mechanisms that come into play in the process and provide a basis for the optimization of the functionalities of this class of materials.

Role of cerium oxide in bioactive glasses during catalytic dissociation of hydrogen peroxide / Benedetti, Francesco; Amidani, Lucia; Pelli Cresi, Jacopo Stefano; Boscherini, Federico; Valeri, Sergio; D'Addato, Sergio; Nicolini, Valentina; Malavasi, Gianluca; Luches, Paola. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 20:36(2018), pp. 23507-23514-23514. [10.1039/c8cp02271b]

Role of cerium oxide in bioactive glasses during catalytic dissociation of hydrogen peroxide

Benedetti, Francesco
Membro del Collaboration Group
;
Pelli Cresi, Jacopo Stefano
Membro del Collaboration Group
;
Valeri, Sergio
Membro del Collaboration Group
;
D'Addato, Sergio
Membro del Collaboration Group
;
Nicolini, Valentina
Membro del Collaboration Group
;
Malavasi, Gianluca
Membro del Collaboration Group
;
Luches, Paola
Membro del Collaboration Group
2018

Abstract

The addition of cerium oxide to bioactive glasses, important materials for bone tissue regeneration, has been shown to induce multifunctionality, combining a significant bioactivity with antioxidant properties. We provide a real time investigation of the evolution of the electronic properties of highly diluted cerium ions in a liquid environment containing hydrogen peroxide - the most abundant reactive oxygen species in living cells. This challenging task is undertaken by means of high-energy resolution fluorescence detected by X-ray absorption near-edge spectroscopy at the Ce L-3 edge. We investigate samples with variable compositions and different morphologies. We relate the observed spectroscopic changes not only to variations in the concentration of the two Ce oxidation states in the samples, but also to changes in the local atomic environment of Ce ions, providing a clear picture of the role of cerium ions in the dissociation of hydrogen peroxide. The obtained results contribute to the understanding of the mechanisms that come into play in the process and provide a basis for the optimization of the functionalities of this class of materials.
20
36
23507-23514
23514
Role of cerium oxide in bioactive glasses during catalytic dissociation of hydrogen peroxide / Benedetti, Francesco; Amidani, Lucia; Pelli Cresi, Jacopo Stefano; Boscherini, Federico; Valeri, Sergio; D'Addato, Sergio; Nicolini, Valentina; Malavasi, Gianluca; Luches, Paola. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 20:36(2018), pp. 23507-23514-23514. [10.1039/c8cp02271b]
Benedetti, Francesco; Amidani, Lucia; Pelli Cresi, Jacopo Stefano; Boscherini, Federico; Valeri, Sergio; D'Addato, Sergio; Nicolini, Valentina; Malavasi, Gianluca; Luches, Paola
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1169499
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