Thermal evolution of silver nanoparticles onto porous TiO2 nanostructures

被引：2

作者：

Moldovan, Simona ^{[1
,4
]}

Roiban, Lucian ^{[1
,5
]}

Georgescu, Dumitru ^{[1
,2
,3
]}

Baia, Lucian ^{[2
,3
]}

Ersen, Ovidiu ^{[1
]}

机构：

[1] Inst Phys & Chim Mat Strasbourg, 23 Rue Loess, F-67034 Strasbourg, France

[2] Univ Babes Bolyai, Fac Phys, M Kogalniceanu 1, Cluj Napoca 400084, Romania

[3] Univ Babes Bolyai, Inst Interdisciplinary Res Bionanosci Cluj Napoca, M Kogalniceanu 1, Cluj Napoca 400084, Romania

[4] Univ Rouen, Normandie Univ, INSA Rouen, Groupe Phys Mat,UMR CNRS 6634, Ave Univ BP12, F-76801 St Etienne Du Rouvray, France

[5] Univ Claude Bernard Lyon I, Univ Lyon, INSA Lyon, UMR5510 CNRS, Bat Blaise Pascal 7 Ave Jean Capelle, F-69621 Villeurbanne, France

来源：

CATALYSIS TODAY | 2017年 / 284卷

关键词：

ZINC-OXIDE; CARBON-MONOXIDE; PHOTOCATALYSIS; NANOCOMPOSITES; OXIDATION; CATALYSTS; OXYGEN; DARK;

D O I：

10.1016/j.cattod.2016.12.025

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The evolution of composite systems constituted by Ag nanoparticles (NPs) deposited onto TiO2 supports under thermal constraints is reported here. The experimental approach advanced combines different working modes and methodologies available in a transmission electron microscope (TEM), i.e. in-situ TEM and electron tomography as carried out on the very same object. The results clearly show the role of the temperature, and the environment on the ratio of encapsulated Ag NPs and on both the morphology and crystallinity of the TiO2 support. Apart from the morphology changes, this study stands as a fundamental investigation of the mechanisms of NPs coarsening particularly by Ostwald ripening. This type of behaviour can be definitely associated to the morphology changes induced by a photocatalytic reactions commonly carried out on TiO2 supports. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：221 / 228

页数：8

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