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Wavelength Effect on Photocatalytic Reduction of CO(2) by Ag/TiO(2) Catalyst

SYSNO ASEP	0363297
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Wavelength Effect on Photocatalytic Reduction of CO(2) by Ag/TiO(2) Catalyst
Author(s)	Kočí, K. (CZ) Zatloukalová, K. (CZ) Obalová, L. (CZ) Krejčíková, Simona (UCHP-M)_{RID, ORCID, SAI} Lacný, Z. (CZ) Čapek, L. (CZ) Hospodková, Alice (FZU-D)_{RID, ORCID, SAI} Šolcová, Olga (UCHP-M)_{RID, ORCID, SAI}
Source Title	Chinese Journal of Catalysis - ISSN 0253-9837 Roč. 32, 5/SI/ (2011), s. 812-815
Number of pages	4 s.
Action	6th International Conference on Environmental Catalysis (6th ICEC)
Event date	12.09.2010-15.09.2010
VEvent location	Beijing
Country	CN - China
Event type	EUR
Language	eng - English
Country	CN - China
Keywords	silver doping ; titania ; carbon dioxide reduction ; photocatalysis ; wavelength
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
R&D Projects	GA104/09/0694 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40720504 - UCHP-M (2005-2011)
	AV0Z10100521 - FZU-D (2005-2011)
UT WOS	000291508200017
DOI	10.1016/S1872-2067(10)60199-4
Annotation	Photocatalytic reduction of CO(2) by water was performed in the presence of a Ag/TiO(2) catalyst under illumination by lamps with different wavelengths (254, 365, and 400 nm). The yields of the main products (methane and methanol) were higher with the 254 nm lamp than with the 365 lamp while no products were observed with the 400 nm lamp. This was because the electron-hole generation rate increased with increasing energy of irradiation (decreasing wavelength) and there were higher densities of electron states at higher energies in TiO(2). The increased efficiency of electron-hole generation with a shorter wavelength irradiation increased the efficiency of the catalyst. The energy of the electrons excited by visible light (400 nm) was too low for CO(2) photocatalytic reduction.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2012

Number of the records: 1