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

L. Kõrösi, Szilvia Papp, Judit Ménesi, E. Illés, Volker Zöllmer, André Richardt, I. Dékány

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Silver-modified titania samples (Ag-TiO2) 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 AgOx particles on TiO2 surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO2 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-TiO2 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.

Original languageEnglish
Pages (from-to)136-142
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume319
Issue number1-3
DOIs
Publication statusPublished - Apr 15 2008

Fingerprint

gas-solid interfaces
Silver
titanium oxides
Titanium dioxide
Gases
silver
Liquids
liquids
X ray photoelectron spectroscopy
titanium
Titanium
Transmission electron microscopy
transmission electron microscopy
Photooxidation
photooxidation
Photodegradation
Ultraviolet spectroscopy
organic compounds
Organic compounds
Oxides

Keywords

  • Adsorption
  • Ethanol
  • Photocatalysis
  • Silver
  • Titanium dioxide

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Photocatalytic activity of silver-modified titanium dioxide at solid-liquid and solid-gas interfaces. / Kõrösi, L.; Papp, Szilvia; Ménesi, Judit; Illés, E.; Zöllmer, Volker; Richardt, André; Dékány, I.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 319, No. 1-3, 15.04.2008, p. 136-142.

Research output: Contribution to journalArticle

@article{4baaf904247246d79f768bfbe0cfeb86,
title = "Photocatalytic activity of silver-modified titanium dioxide at solid-liquid and solid-gas interfaces",
abstract = "Silver-modified titania samples (Ag-TiO2) 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 AgOx particles on TiO2 surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO2 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-TiO2 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.",
keywords = "Adsorption, Ethanol, Photocatalysis, Silver, Titanium dioxide",
author = "L. K{\~o}r{\"o}si and Szilvia Papp and Judit M{\'e}nesi and E. Ill{\'e}s and Volker Z{\"o}llmer and Andr{\'e} Richardt and I. D{\'e}k{\'a}ny",
year = "2008",
month = "4",
day = "15",
doi = "10.1016/j.colsurfa.2007.11.030",
language = "English",
volume = "319",
pages = "136--142",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Photocatalytic activity of silver-modified titanium dioxide at solid-liquid and solid-gas interfaces

AU - Kõrösi, L.

AU - Papp, Szilvia

AU - Ménesi, Judit

AU - Illés, E.

AU - Zöllmer, Volker

AU - Richardt, André

AU - Dékány, I.

PY - 2008/4/15

Y1 - 2008/4/15

N2 - Silver-modified titania samples (Ag-TiO2) 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 AgOx particles on TiO2 surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO2 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-TiO2 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.

AB - Silver-modified titania samples (Ag-TiO2) 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 AgOx particles on TiO2 surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO2 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-TiO2 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.

KW - Adsorption

KW - Ethanol

KW - Photocatalysis

KW - Silver

KW - Titanium dioxide

UR - http://www.scopus.com/inward/record.url?scp=43049151062&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43049151062&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2007.11.030

DO - 10.1016/j.colsurfa.2007.11.030

M3 - Article

AN - SCOPUS:43049151062

VL - 319

SP - 136

EP - 142

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 1-3

ER -