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Photoelectrochemical Behavior of Silver Nanoparticles inside Mesoporous Titania: Plasmon-Induced Charge Separation Effect

Abstract : The self-assembly block copolymer method was used to synthesize mesoporous titania films and silver nanoparticles (NPs) were grown inside the films. Such silver NPs-titania films are known for their multicolor photochromic properties due to a photo-oxidation reaction of silver in the presence of titania under light excitation which is attributed to a plasmon induced charge separation. Here, the photoelectrochemical properties of these composite films have been investigated at different light wavelengths and chemical environment in order to characterize the light-induced redox reactivity modifications. Cyclic voltammetry study shows that the Ag+ electro-reduction peak potential varies depending on the light irradiation, which determines the state of the silver nanoparticles complexed or not by titania.
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https://hal-univ-lyon1.archives-ouvertes.fr/hal-02087646
Contributor : Mathieu Maillard <>
Submitted on : Tuesday, April 2, 2019 - 11:46:52 AM
Last modification on : Tuesday, July 21, 2020 - 4:55:52 PM

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Maillard Mathieu, Nelly Couzon, Mathieu Maillard, Fernand Chassagneux, Arnaud Brioude, et al.. Photoelectrochemical Behavior of Silver Nanoparticles inside Mesoporous Titania: Plasmon-Induced Charge Separation Effect. Langmuir, American Chemical Society, 2018, 35 (7), pp.2517-2526. ⟨10.1021/acs.langmuir.8b03617⟩. ⟨hal-02087646⟩

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