Photocatalytic CO2 reduction over mesoporous TiO2 photocatalysts
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F24%3A10253540" target="_blank" >RIV/61989100:27710/24:10253540 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/61989100:27360/24:10253540
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S1369800123006200" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1369800123006200</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mssp.2023.107927" target="_blank" >10.1016/j.mssp.2023.107927</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Photocatalytic CO2 reduction over mesoporous TiO2 photocatalysts
Popis výsledku v původním jazyce
In this study, we investigated different synthesis methods (template-free and template-based) using copolymers of poly(ethylene oxide) and poly(propylene oxide) to enhance the CO2 reduction activity of mesoporous TiO2. Our main goal was to identify key factors affecting photocatalyst efficiency and selectivity. We compared the newly synthesized TiO2 photocatalysts with the commercial photocatalyst P25. Among the materials studied, TiO2-P123 in its pure anatase form demonstrated the highest photoreduction efficiency and CO2 selectivity. In contrast, TiO2-EG, TiO2-F127, and P25, which contained both rutile and anatase phases, exhibited decreased photoactivity due to the formation of a type II heterojunction between the phases and higher oxygen adsorption on rutile's surface. Additionally, we observed that the choice of chemicals for photocatalyst preparation significantly influenced the specific surface area. TiO2-P123, the most active photocatalyst, had the highest specific surface area, providing more reactive sites for improved light absorption efficiency and prolonged electron-hole pair lifetimes, resulting in enhanced photocatalytic activity. We also calculated apparent quantum yields to support our findings.
Název v anglickém jazyce
Photocatalytic CO2 reduction over mesoporous TiO2 photocatalysts
Popis výsledku anglicky
In this study, we investigated different synthesis methods (template-free and template-based) using copolymers of poly(ethylene oxide) and poly(propylene oxide) to enhance the CO2 reduction activity of mesoporous TiO2. Our main goal was to identify key factors affecting photocatalyst efficiency and selectivity. We compared the newly synthesized TiO2 photocatalysts with the commercial photocatalyst P25. Among the materials studied, TiO2-P123 in its pure anatase form demonstrated the highest photoreduction efficiency and CO2 selectivity. In contrast, TiO2-EG, TiO2-F127, and P25, which contained both rutile and anatase phases, exhibited decreased photoactivity due to the formation of a type II heterojunction between the phases and higher oxygen adsorption on rutile's surface. Additionally, we observed that the choice of chemicals for photocatalyst preparation significantly influenced the specific surface area. TiO2-P123, the most active photocatalyst, had the highest specific surface area, providing more reactive sites for improved light absorption efficiency and prolonged electron-hole pair lifetimes, resulting in enhanced photocatalytic activity. We also calculated apparent quantum yields to support our findings.
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/GF21-24268K" target="_blank" >GF21-24268K: Přeměna CO2 na užitečné chemikálie katalytickými a fotokatalytickými procesy v přítomnosti vysoce aktivních materiálů</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2024
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Materials Science in Semiconductor Processing
ISSN
1369-8001
e-ISSN
1873-4081
Svazek periodika
169
Číslo periodika v rámci svazku
January
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
9
Strana od-do
nestránkováno
Kód UT WoS článku
001103466000001
EID výsledku v databázi Scopus
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