Colloidal approach to Au-loaded TiO2 thin films with optimized optical sensing properties

被引：32

作者：

Della Gaspera, Enrico ^{[2
]}

Antonello, Alessandro ^{[1
,2
]}

Guglielmi, Massimo ^{[2
]}

Post, Michael L. ^{[3
]}

Bello, Valentina ^{[4
]}

Mattei, Giovanni ^{[4
]}

Romanato, Filippo ^{[4
]}

Martucci, Alessandro ^{[1
,2
]}

机构：

[1] Univ Padua, IOM CNR, INSTM, I-35131 Padua, Italy

[2] Univ Padua, Dipartimento Ingn Meccan Settore Mat, I-35131 Padua, Italy

[3] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada

[4] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 12期

关键词：

CO OXIDATION; METAL NANOPARTICLES; H-2-RICH GAS; GOLD; OXIDE; DEPOSITION; NANOCRYSTALS; TEMPERATURE; PARTICLES; CATALYSTS;

D O I：

10.1039/c0jm03494k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TiO2 and Au nanoparticles are synthesized by the colloidal technique and used for nanocomposite thin film preparation. The effect of thermal treatment and organic template presence is analyzed in order to tailor film microstructure. The Au-TiO2 interfaces as well as the overall porosity of the films are analyzed combining structural and morphological characterization along with spectroscopic ellipsometry and surface plasmon spectroscopy analyses. An efficient surrounding of TiO2 nanoparticles around Au colloids is obtained, leading to an extensive noble metal-metal oxide interface, improving functional properties of the films, while keeping a porous structure. Gas sensing tests are performed on these nanocomposites films: reversible sensing dynamics for CO detection are observed with high sensitivity and a correlation between response and recovery times and microstructure is reported.

引用

页码：4293 / 4300

页数：8

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