Pregled bibliografske jedinice broj: 1207955
Band Gap Engineering in Novel Fluorite-Type Rare Earth High-Entropy Oxides (RE-HEOs) with Computational and Experimental Validation for Photocatalytic Water Splitting Applications
Band Gap Engineering in Novel Fluorite-Type Rare Earth High-Entropy Oxides (RE-HEOs) with Computational and Experimental Validation for Photocatalytic Water Splitting Applications // Abstract Book - 10th Annual International Conference on Chemistry / Contis, Ellene T. ; Gkounta, Olga (ur.).
Atena: Athens Institute for Education and Research (ATINER), 2022. str. 27-27 (predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 1207955 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Band Gap Engineering in Novel Fluorite-Type Rare
Earth High-Entropy Oxides (RE-HEOs) with
Computational and Experimental Validation for
Photocatalytic Water Splitting Applications
Autori
Đerđ, Igor ; Tatar, Dalibor ; Kojčinović, Jelena ; Nundy, Srijita ; Tahir, Asif A. ; Ullah, Habib ; Ghosh, Aritra
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Abstract Book - 10th Annual International Conference on Chemistry
/ Contis, Ellene T. ; Gkounta, Olga - Atena : Athens Institute for Education and Research (ATINER), 2022, 27-27
ISBN
978-960-598-517-2
Skup
10th Annual International Conference on Chemistry
Mjesto i datum
Atena, Grčka, 18.07.2022. - 21.07.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
High-entropy oxides, photocatalysis, hydrogen, hydrogen evolution reaction
Sažetak
Five different rare-earth-based high entropy oxides (HEOs) nanoparticles with fluorite type of structure and average crystallite sizes between 6 and 9 nm are prepared and their photocatalytic behaviour towards AZO dye degradation and photoelectrochemical water splitting for hydrogen generation is examined. The cationic site in the fluorite lattice consists of five equimolar elements selected from the group of rare-earth elements including La, Ce, Pr, Eu, and Gd and second-row transition metals, Y and Zr. Studied HEOs exhibit bandgaps in the range from 1.91 eV to 3.0 eV and appropriate valence and conduction bands for water splitting. They reveal high photocatalytic activity that is mostly attributed to the accessibility of more photocatalytic active sites which provided radicals responsible for the AZO dye degradation. The material successfully produces hydrogen by photocatalytic water splitting, suggesting the potential of HEOs as new photocatalysts. The photocatalytic performances of all studied HEOs outperform the single fluorite oxides or equivalent mixed oxides. The Ce0.2Zr0.2La0.2Pr0.2Y0.2O2 engender hydrogen in 9.2 µmolmg–1 per hour that is much higher content than for pristine CeO2 material which amounts to 0.8 µmolmg–1 per hour.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Kemija
POVEZANOST RADA
Projekti:
HRZZ-PZS-2019-02-2467 - Istraživanje utjecaja metalnih promotora rijetkih zemalja i stupnja uređenja na redoks svojstva sustava CeO2 - ZrO2 (SREMPOREPROCEZIS) (Đerđ, Igor, HRZZ - 2019-02) ( CroRIS)
Ustanove:
Sveučilište u Osijeku - Odjel za kemiju
