Photoelectrochemical and photocatalytic activity of tungsten doped TiO2 nanotube layers in the near visible region
Identifieur interne : 006831 ( Main/Exploration ); précédent : 006830; suivant : 006832Photoelectrochemical and photocatalytic activity of tungsten doped TiO2 nanotube layers in the near visible region
Auteurs : C. Das [Allemagne] ; I. Paramasivam [Allemagne] ; N. Liu [Allemagne] ; P. Schmuki [Allemagne]Source :
- Electrochimica acta [ 0013-4686 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Photoélectrochimie, Photocatalyse, Tungstène VI Oxyde, Matériau dopé, Titane IV Oxyde, Nanotube, Anodisation, Titane alliage, Tungstène alliage, Alliage binaire, Rayonnement visible, Courant photoélectrique, Microscopie électronique balayage, Photolyse, Rhodamine, Cinétique, Structure surface, Morphologie, Colorant basique, Colorant xanthénique.
English descriptors
- KwdEn :
- Anodizing, Basic dye, Binary alloy, Doped materials, Kinetics, Morphology, Nanotube, Photocatalysis, Photoelectric current, Photoelectrochemistry, Photolysis, Rhodamine, Scanning electron microscopy, Surface structure, Titanium IV Oxides, Titanium alloy, Tungsten VI Oxides, Tungsten alloy, Visible radiation, Xanthene dye.
Abstract
In the present work we study the effect of WO3 doping on the photo-electrochemical behavior of self-organized TiO2 nanotube layers. Mixed oxide nanotubes were grown by anodization of Ti-W alloys containing 0.2 and 9% W, with a thicknesses of the oxide nanotube layers adjusted to about 1.1-1.2 μm. We show that by WO3 doping, the near visible photoresponse and photocatalytic performance can drastically be enhanced. While a content of 9 at% WO3 in photoresponse experiments is most beneficial, in long term experiments a higher efficiency is observed for the 0.2 at% W content. This is due to a gradual leaching of W03 (dissolution into the electrolyte) for the higher WO3 content. This demonstrates that under optimized WO3 doping conditions a lasting visible light activation of TiO2 nanotubes can be achieved.
Affiliations:
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Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author><author><name sortKey="Schmuki, P" sort="Schmuki, P" uniqKey="Schmuki P" first="P." last="Schmuki">P. Schmuki</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0325026</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 12-0325026 INIST</idno><idno type="RBID">Pascal:12-0325026</idno><idno type="wicri:Area/PascalFrancis/Corpus">001181</idno><idno type="wicri:Area/PascalFrancis/Curation">004D36</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001793</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001793</idno><idno type="wicri:doubleKey">0013-4686:2011:Das C:photoelectrochemical:and:photocatalytic</idno><idno type="wicri:Area/Main/Merge">006C44</idno><idno type="wicri:Area/Main/Curation">006831</idno><idno type="wicri:Area/Main/Exploration">006831</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Photoelectrochemical and photocatalytic activity of tungsten doped TiO<sub>2</sub> nanotube layers in the near visible region</title><author><name sortKey="Das, C" sort="Das, C" uniqKey="Das C" first="C." last="Das">C. Das</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author><author><name sortKey="Paramasivam, I" sort="Paramasivam, I" uniqKey="Paramasivam I" first="I." last="Paramasivam">I. Paramasivam</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author><author><name sortKey="Liu, N" sort="Liu, N" uniqKey="Liu N" first="N." last="Liu">N. Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author><author><name sortKey="Schmuki, P" sort="Schmuki, P" uniqKey="Schmuki P" first="P." last="Schmuki">P. Schmuki</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7</s1><s2>91058 Erlangen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>91058 Erlangen</wicri:noRegion><placeName><settlement type="city">Erlangen</settlement><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Moyenne-Franconie</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Electrochimica acta</title><title level="j" type="abbreviated">Electrochim. acta</title><idno type="ISSN">0013-4686</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Electrochimica acta</title><title level="j" type="abbreviated">Electrochim. acta</title><idno type="ISSN">0013-4686</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anodizing</term><term>Basic dye</term><term>Binary alloy</term><term>Doped materials</term><term>Kinetics</term><term>Morphology</term><term>Nanotube</term><term>Photocatalysis</term><term>Photoelectric current</term><term>Photoelectrochemistry</term><term>Photolysis</term><term>Rhodamine</term><term>Scanning electron microscopy</term><term>Surface structure</term><term>Titanium IV Oxides</term><term>Titanium alloy</term><term>Tungsten VI Oxides</term><term>Tungsten alloy</term><term>Visible radiation</term><term>Xanthene dye</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Photoélectrochimie</term><term>Photocatalyse</term><term>Tungstène VI Oxyde</term><term>Matériau dopé</term><term>Titane IV Oxyde</term><term>Nanotube</term><term>Anodisation</term><term>Titane alliage</term><term>Tungstène alliage</term><term>Alliage binaire</term><term>Rayonnement visible</term><term>Courant photoélectrique</term><term>Microscopie électronique balayage</term><term>Photolyse</term><term>Rhodamine</term><term>Cinétique</term><term>Structure surface</term><term>Morphologie</term><term>Colorant basique</term><term>Colorant xanthénique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In the present work we study the effect of WO<sub>3</sub> doping on the photo-electrochemical behavior of self-organized TiO<sub>2</sub> nanotube layers. Mixed oxide nanotubes were grown by anodization of Ti-W alloys containing 0.2 and 9% W, with a thicknesses of the oxide nanotube layers adjusted to about 1.1-1.2 μm. We show that by WO<sub>3</sub> doping, the near visible photoresponse and photocatalytic performance can drastically be enhanced. While a content of 9 at% WO<sub>3</sub> in photoresponse experiments is most beneficial, in long term experiments a higher efficiency is observed for the 0.2 at% W content. This is due to a gradual leaching of W<sub>0</sub>3 (dissolution into the electrolyte) for the higher WO<sub>3</sub> content. This demonstrates that under optimized WO<sub>3</sub> doping conditions a lasting visible light activation of TiO<sub>2</sub> nanotubes can be achieved.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>Bavière</li><li>District de Moyenne-Franconie</li></region><settlement><li>Erlangen</li></settlement></list><tree><country name="Allemagne"><region name="Bavière"><name sortKey="Das, C" sort="Das, C" uniqKey="Das C" first="C." last="Das">C. Das</name></region><name sortKey="Liu, N" sort="Liu, N" uniqKey="Liu N" first="N." last="Liu">N. Liu</name><name sortKey="Paramasivam, I" sort="Paramasivam, I" uniqKey="Paramasivam I" first="I." last="Paramasivam">I. Paramasivam</name><name sortKey="Schmuki, P" sort="Schmuki, P" uniqKey="Schmuki P" first="P." last="Schmuki">P. Schmuki</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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