A Comparative Study of Photo-Assisted Deposition of Silver Nanoparticles on TiO2

被引：15

作者：

Albiter, E. ^{[1
]}

Hai, Z. ^{[2
,3
]}

Alfaro, S. ^{[1
]}

Remita, H. ^{[2
,3
]}

Valenzuela, M. A. ^{[1
]}

Colbeau-Justin, C. ^{[2
,3
]}

机构：

[1] Inst Politecn Nacl, ESIQIE, Lab Catalisis & Mat, Mexico City 07738, DF, Mexico

[2] Univ Paris Sud, CNRS, Chim Phys Lab, UMR 8000, F-91405 Orsay, France

[3] IPN, ESIQIE, Mexico City 07738, DF, Mexico

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2013年 / 13卷 / 07期

关键词：

Photodeposition; Silver Nanoparticles; TiO2; P25; TRMC; Photocatalysis; CHARGE-CARRIER LIFETIMES; PHOTOCATALYTIC ACTIVITY; GOLD; NANOSTRUCTURES; NANOCOMPOSITE; DIOXIDE; SURFACE; PHOTODEGRADATION; ENHANCEMENT; MECHANISMS;

D O I：

10.1166/jnn.2013.7590

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Noble metals deposited on TiO2 act as electron traps. facilitating electron hole separation and promoting the interfacial electron transfer process. In particular, silver nanoparticles have the ability to absorb visible light due to localized surface plasmon resonance. Here we report a photochemical and photocatalytic method for depositing Ag nanoparticles (2-20 nm) on TiO2 by using UV light at room temperature. UV-Vis diffuse reflectance spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and time-resolved microwave conductivity were used as characterization techniques. The photocatalytic activity was investigated by measuring the decomposition of rhodamine B under UV and visible light irradiation. The fastest bleaching of RhB under visible-light irradiation has been obtained by Ag/TiO2 plasmonic photocatalyst prepared by the photocatalytic route. These results were explained in terms of the more efficient photon absorption due to the presence of the surface plasmon resonance.

引用

页码：4943 / 4948

页数：6

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