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

被引：12
作者：
Couzon, Nelly [1 ]
Maillard, Mathieu [1 ]
Chassagneux, Fernand [1 ]
Brioude, Arnaud [1 ]
Bois, Laurence [1 ]
机构：
[1] Univ Claude Bernard Lyon 1, Lab Multimat & Interfaces, UMR CNRS 5615, Lyon, France
来源：
LANGMUIR | 2019年 / 35卷 / 07期
关键词：
AG NANOPARTICLES; THIN-FILMS; MULTICOLOR PHOTOCHROMISM; ASSISTED GROWTH; UV; PHOTOCATALYSTS; NANOCOMPOSITES; DIOXIDE; METALS; ENERGY;
D O I：
10.1021/acs.langmuir.8b03617
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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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收藏
页码：2517 / 2526
页数：10
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