Photocatalytic activity of silver-modified titanium dioxide at solid-liquid and solid-gas interfaces

被引：41

作者：

Korosi, Laszlo ^{[1
]}

Papp, Szilvia ^{[1
]}

Menesi, Judit ^{[2
]}

Illes, Erzsebet ^{[2
]}

Zoellmer, Volker ^{[3
]}

Richardt, Andre ^{[4
]}

Dekany, Imre ^{[1
,2
]}

机构：

[1] Univ Szeged, Hungarian Acad Sci, Supramol & Nanostructured Mat Res Grp, H-6720 Szeged, Hungary

[2] Univ Szeged, Dept Colloid Chem, H-6720 Szeged, Hungary

[3] Fraunhofer Inst Mfg & Adv Mat IFAM, D-28359 Bremen, Germany

[4] NBC Protect, German Armed Forces Sci Inst Protect Technol, D-29623 Munster, Germany

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 319卷 / 1-3期

关键词：

titanium dioxide; adsorption; ethanol; photocatalysis; silver;

D O I：

10.1016/j.colsurfa.2007.11.030

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：

Silver-modified titania samples (Ag-TiO(2)) With varying silver content (0.1-1.0 wt%) were prepared. Silver-modification of titanium dioxide was examined by TEM, XRD, XPS and DR-UV-vis spectroscopy. Ag or AgO(x) particles on TiO(2) surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO(2) samples varied between light rose and purple-brown. XPS measurements revealed that silver exists mainly in oxide form. The photocatalytic activity of pure and Ag-Ti02 samples were compared both in solid-liquid and in solid-gas interfaces. In the liquid phase the 2,2'-thiodiethanol was used as test molecule. Ethanol photodegradation was examined in gas phase at dry initial condition. It was shown that the rate of photooxidation of organic compounds significantly enhanced by silver-modification of titania. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：136 / 142

页数：7

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