A comparative study of TiO2 preparation method on their photocatalytic activity for CO2 reduction
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
A comparative study of TiO2 preparation method on their photocatalytic activity for CO2 reduction
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
A comparative study of TiO2 preparation method on their photocatalytic activity for CO2 reduction
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10403 - Physical chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Catalysis Today
ISSN
0920-5861
e-ISSN
1873-4308
Svazek periodika
Neuveden
Číslo periodika v rámci svazku
March 2023
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
6
Strana od-do
nestrankovano
Kód UT WoS článku
000955506000001
EID výsledku v databázi Scopus
2-s2.0-85143530735