Silver functionalized titania-silica xerogels: Preparation, morpho-structural and photocatalytic properties, kinetic modeling

Peter Anca , Mihaly-cozmuta Leonard , Mihaly-cozmuta Anca , Nicula Camelia , Cadar Calin , Agnieszka Jastrzębska , Patrycja Kurtycz , Andrzej Olszyna , Vulpoi Adriana , Danciu Virginia , Radu Teodora , Baia Lucian

Abstract

Preparation, morpho-structural and photo-characterization of Ag/TiO2–SiO2 (0.5–1wt%) composites were reported. The silver ions were reduced on the titania–silica surface in two different routes. The best Ag/TiO2–SiO2 photocatalysts must have high specific surface area and low Ag content, when the Ag nanoparticles homogeneous dispersed onto the mixed oxide surface generates an oxidation state of titanium (TiAg4+), that improves the charge carriers transfer, thus increasing their photoactivity. A negative value of the activation energy suggested that the temperature does not influence the photoactivity of the composites.
Author Peter Anca
Peter Anca,,
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, Mihaly-cozmuta Leonard
Mihaly-cozmuta Leonard,,
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, Mihaly-cozmuta Anca
Mihaly-cozmuta Anca,,
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, Nicula Camelia
Nicula Camelia,,
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, Cadar Calin
Cadar Calin,,
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, Agnieszka Jastrzębska (FMSE / DSMP)
Agnieszka Jastrzębska,,
- Division of Ceramic Materials and Polymers
, Patrycja Kurtycz (FMSE / DSMP)
Patrycja Kurtycz,,
- Division of Ceramic Materials and Polymers
, Andrzej Olszyna (FMSE / DSMP)
Andrzej Olszyna,,
- Division of Ceramic Materials and Polymers
, Vulpoi Adriana
Vulpoi Adriana,,
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, Danciu Virginia
Danciu Virginia,,
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et al.`
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388, (A 35 pkt)
Issue year2015
Vol648
No5
Pages890-902
Keywords in English Nanostructured Ag/TiO2–SiO2 composites; Sol–gel growth; Isolated Ag nanoparticles; Photoactivity; Activation energy
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2015 = 3.014 (2) - 2015=2.808 (5)
Citation count*13 (2018-11-14)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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