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Pregled bibliografske jedinice broj: 1274573

Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr)

Šarić, Stjepan; Kojčinović, Jelena; Tatar, Dalibor; Deak, Cora; Sapi, Andras; Szenti, Imre; Đerđ, Igor
Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr) // 7th Faculty of Science PhD Student Symposium - Book of Abstracts / Pavlek, Katarina (ur.).
Zagreb: Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2023. str. 123-123 (poster, domaća recenzija, sažetak, znanstveni)

CROSBI ID: 1274573 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr)

Autori
Šarić, Stjepan ; Kojčinović, Jelena ; Tatar, Dalibor ; Deak, Cora ; Sapi, Andras ; Szenti, Imre ; Đerđ, Igor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th Faculty of Science PhD Student Symposium - Book of Abstracts / Pavlek, Katarina - Zagreb : Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2023, 123-123

ISBN
978-953-6076-01-7

Skup
7th Faculty of Science PhD Student Symposium

Mjesto i datum
Zagreb, Hrvatska, 21.04.2023. - 22.04.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
kappa ; pyrochlore ; rare-earth

Sažetak
Tetragonal solid solutions t-Ce0.5Zr0.5O2 and t- La0.1Y0.1Gd0.1Pr0.1Ce0.1Zr0.5O2 were synthesized using a low- cost and environmentally friendly citrate sol-gel route followed by calcination at 600 °C. Solid solutions were reduced by calcination at 1500 °C in a gaseous mixture of 3% hydrogen in argon, to form pyrochlore phases Ce2Zr2O7 and (La0.2Y0.2Gd0.2Pr0.2Ce0.2)2Zr2O7. The last step of phase transformations is the re- oxidation of pyrochlore phases at 600 °C to kappa phases κ-Ce2Zr2O8 and κ- (La0.2Y0.2Gd0.2Pr0.2Ce0.2)2Zr2O8, respectively. All synthesized materials were characterized by the Rietveld refinement of X-ray powder diffraction patterns. Raman spectroscopy was used to complement XRD analysis and to calculate the Ce3+/Ce4+ ratio. Scanning electron microscopy coupled with Energy-dispersive X-ray spectroscopy (SEM-EDS) was a useful method to inspect the morphology and chemical content of each compound. Oxygen uptake of pyrochlore forms was monitored by thermogravimetric analysis (TGA). Structural differences between tetragonal, pyrochlore and kappa forms of synthesized compounds were observed. The reversible exchange of Ce4+ to Ce3+ and vice versa makes ceria-based materials suitable as catalysts in oxidation reactions.

Izvorni jezik
Engleski

Znanstvena područja
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

Profili:

Avatar Url Jelena Kojčinović (autor)

Avatar Url Igor Đerđ (autor)

Avatar Url Stjepan Šarić (autor)

Avatar Url Dalibor Tatar (autor)

Poveznice na cjeloviti tekst rada:

Pristup cjelovitom tekstu rada

Citiraj ovu publikaciju:

Šarić, Stjepan; Kojčinović, Jelena; Tatar, Dalibor; Deak, Cora; Sapi, Andras; Szenti, Imre; Đerđ, Igor
Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr) // 7th Faculty of Science PhD Student Symposium - Book of Abstracts / Pavlek, Katarina (ur.).
Zagreb: Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2023. str. 123-123 (poster, domaća recenzija, sažetak, znanstveni)
Šarić, S., Kojčinović, J., Tatar, D., Deak, C., Sapi, A., Szenti, I. & Đerđ, I. (2023) Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr). U: Pavlek, K. (ur.)7th Faculty of Science PhD Student Symposium - Book of Abstracts.
@article{article, author = {\v{S}ari\'{c}, Stjepan and Koj\v{c}inovi\'{c}, Jelena and Tatar, Dalibor and Deak, Cora and Sapi, Andras and Szenti, Imre and \DJer\dj, Igor}, editor = {Pavlek, K.}, year = {2023}, pages = {123-123}, keywords = {kappa, pyrochlore, rare-earth}, isbn = {978-953-6076-01-7}, title = {Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr)}, keyword = {kappa, pyrochlore, rare-earth}, publisher = {Prirodoslovno-matemati\v{c}ki fakultet Sveu\v{c}ili\v{s}ta u Zagrebu}, publisherplace = {Zagreb, Hrvatska} }
@article{article, author = {\v{S}ari\'{c}, Stjepan and Koj\v{c}inovi\'{c}, Jelena and Tatar, Dalibor and Deak, Cora and Sapi, Andras and Szenti, Imre and \DJer\dj, Igor}, editor = {Pavlek, K.}, year = {2023}, pages = {123-123}, keywords = {kappa, pyrochlore, rare-earth}, isbn = {978-953-6076-01-7}, title = {Synthesis and characterization of the rare-earth zirconate pyrochlores, RE2Zr2O7 and the κ-RE2Zr2O8 phases (RE=La, Y, Gd, Pr, Ce and Zr)}, keyword = {kappa, pyrochlore, rare-earth}, publisher = {Prirodoslovno-matemati\v{c}ki fakultet Sveu\v{c}ili\v{s}ta u Zagrebu}, publisherplace = {Zagreb, Hrvatska} }

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