Martin Reli (Author), Peter Nadrah (Author), Miroslava Filip Edelmannová (Author), Rudolf Ricka (Author), Andrijana Sever Škapin (Author), Urška Lavrenčič Štangar (Author), Kamila Kočí (Author)

Abstract

n 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.

Keywords

CO2 reduction;TiO2;photocatalysis;mesoporous material;Sol-gel method;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: ZAG - Slovenian National Building and Civil Engineering Institute
Publisher: Pergamon
UDC: 54
COBISS: 170802691 Link will open in a new window
ISSN: 1369-8001
Views: 226
Downloads: 20
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: CO2 redukcija;TiO2;fotokataliza;mezoporozni material;Sol-gel metoda;
Embargo end date (OpenAIRE): 2025-10-24
Source comment: Nasl. z nasl. zaslona; Opis vira z dne 3. 11. 2023;
Pages: str. 1-9
Issue: ǂVol. ǂ169, [article no.] 107927
Chronology: Jan. 2024
DOI: 10.1016/j.mssp.2023.107927
ID: 20978977