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Quantum Dot Sensitized Titania as Visible-light Photocatalyst for Solar Operation of Photofuel Cells
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Stavroula Sfaelou
Published/Copyright:
November 30, 2016
Abstract
Nanocrystalline titania photoanodes, sensitized with CdS, ZnS, CdSe, Sb2S3 and PbS quantum dots have been employed in photofuel cells functioning with alkaline electrolyte and ethanol as fuel. Ethanol was photocatalytically oxidized producing electric current. It was found that medium band gap semiconductors, obtained by mixing ZnS and CdS, were the best sensitizers since they combine sensitization capacity in the Visible with sufficient oxidative power for oxidizing ethanol. However, in the presence of small band gap semiconductors, like CdSe, Sb2S3 and PbS, the oxidative power is diminished and the system demonstrates a poor behavior. Nanocrystalline titania sensitized by ZnS-CdS makes photoanodes with remarkable stability in the presence of ethanol, which acts as sacrificial agent.
Received: 2013-9-16
Revised: 2013-11-28
Accepted: 2013-11-29
Published Online: 2016-11-30
Published in Print: 2014-1-1
© 2016 by Walter de Gruyter Berlin/Boston
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Keywords for this article
Photofuel cells;
photocatalytic oxidation;
quantum dot sensitization;
titania;
ethanol
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- Synthesis of Platinum Particles Supported on Microporous Carbons for an Electrocatalysis Study of Ammonia and Cytotoxicity
- Glycerol-Assisted Hydrolysis Synthesis of BiOCl and Excellent Visible- Light-Driven Photocatalytic Performance
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- Bi-doped TiO2 with Remarkably Enhanced Photocatalytic Activity Under Simulated Sunlight Induced by Increased Hydrophilicity and Light Absorption Ability
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