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Effect of Silver Doping on the TiO2 for Photocatalytic Reduction of CO2
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SYSNO ASEP 0348662 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of Silver Doping on the TiO2 for Photocatalytic Reduction of CO2 Author(s) Kočí, K. (CZ)
Matějů, K. (CZ)
Obalová, L. (CZ)
Krejčíková, Simona (UCHP-M) RID, ORCID, SAI
Lacný, Z. (CZ)
Plachá, D. (CZ)
Čapek, L. (CZ)
Hospodková, Alice (FZU-D) RID, ORCID, SAI
Šolcová, Olga (UCHP-M) RID, ORCID, SAISource Title Applied Catalysis B - Environmental. - : Elsevier - ISSN 0926-3373
Roč. 96, 3-4 (2010), s. 239-244Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords Ag doping ; TiO2 ; photocatalysis Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GD203/08/H032 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40720504 - UCHP-M (2005-2011) AV0Z10100521 - FZU-D (2005-2011) UT WOS 000277847300001 DOI 10.1016/j.apcatb.2010.02.030 Annotation Pure TiO2 and various silver-enriched TiO2 powders were prepared by the sol–gel process controlled in the reverse micellar environment. The catalysts were tested in CO2 photocatalytic reduction and characterized by X-ray diffraction (XRD), nitrogen adsorption measurement and UV–vis. Methane and methanol were the main reduction products. The yield of methane and methanol increases when modifying the TiO2 by silver incorporation is caused by two mechanisms: up to 5% of Ag in TiO2 the Ag impurity band inside the TiO2 bandgap decreases the absorption edge and increases so the electron–hole pair generation, above 5% of Ag in TiO2 Ag metallic clusters are formed in TiO2 crystals with Shottky barrier at the metal–semiconductor interface, which spatially separates electron and holes and increases their lifetime (decreases probability of their recombination) Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2011
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