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Effect of Silver Doping on the TiO2 for Photocatalytic Reduction of CO2
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SYSNO ASEP 0345255 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV 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 Proceedings. - Bratislava : Slovak University of Technology, 2010 / Markoš J. - ISBN 978-80-227-3290-1 Pages s. 204 Number of pages 1 s. Publication form CD-ROM - CD-ROM Action International Conference of Slovak Society of Chemical Engineering /37./ Event date 24.05.2010-28.05.2010 VEvent location Tatranské Matliare Country SK - Slovakia Event type EUR Language eng - English Country SK - Slovakia Keywords Ag doping ; TiO2 ; CO2 reduction Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GD203/08/H032 GA ČR - Czech Science Foundation (CSF) KAN400720701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40720504 - UCHP-M (2005-2011) AV0Z10100521 - FZU-D (2005-2011) 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 increase 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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