A comparative study of TiO2 preparation method on their photocatalytic activity for CO2 reduction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10251016" target="_blank" >RIV/61989100:27710/22:10251016 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0920586122004229" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0920586122004229</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2022.11.005" target="_blank" >10.1016/j.cattod.2022.11.005</a>
Alternative languages
Result language
angličtina
Original language name
A comparative study of TiO2 preparation method on their photocatalytic activity for CO2 reduction
Original language description
In this work, we aimed to correlate the structural properties of different TiO2 with their photocatalytic performance and selectivity during CO2 photocatalytic reduction at different pH. We prepared two types of TiO2 photocatalysts and characterized them in detail using X-ray powder diffraction, field emission scanning electron microscope, nitrogen adsorption, UV-Vis spectroscopy, photoelectrochemical measurements and X-ray photoelectron spectroscopy techniques. The prepared photocatalysts demonstrated significantly higher selectivity to CO2 reduction (CH4 and CO yields), than a commercial P25. Among them, the photocatalysts TiSG, which had the lowest portion of hydroxyl oxygen species, had the highest photoreduction efficiency. Therefore, the key factors in photocatalytic CO2 reduction with TiO2 are not only the phase composition but also the portion of different types of surface oxygen species, which strongly affects their efficiency and selectivity. Another objective was to investigate the effect of pH on the efficiency and especially the selectivity of photocatalytic CO2 reduction. While methane is mainly formed in basic environments, carbon monoxide is formed in more acidic environments. Also, hydrogen production is twice as high in more acidic environment compared to the basic environment. (C) 2022 Elsevier B.V.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institute of Environmental Technology - Excellent Research</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Catalysis Today
ISSN
0920-5861
e-ISSN
1873-4308
Volume of the periodical
Neuveden
Issue of the periodical within the volume
March 2023
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
nestrankovano
UT code for WoS article
000955506000001
EID of the result in the Scopus database
2-s2.0-85143530735