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undergraduate thesis
Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem
2022. urn:nbn:hr:182:967885
Jezidžić, Anđela
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

Cite this document

Jezidžić, A. (2022). Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:967885

Jezidžić, Anđela. "Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2022. https://urn.nsk.hr/urn:nbn:hr:182:967885

Jezidžić, Anđela. "Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2022. https://urn.nsk.hr/urn:nbn:hr:182:967885

Jezidžić, A. (2022). 'Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 09 December 2024, https://urn.nsk.hr/urn:nbn:hr:182:967885

Jezidžić A. Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2022 [cited 2024 December 09] Available at: https://urn.nsk.hr/urn:nbn:hr:182:967885

A. Jezidžić, "Sinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:182:967885

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Metadata
TitleSinteza i strukturna karakterizacija cerij-cirkonij katalizatora dopiranog europijem
Title (english)Synthesis and structural characterization of ceria-zirconia catalyst doped with europium
AuthorAnđela Jezidžić
MentorIgor Đerđ (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2022-09-28, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Applied Chemistry
Abstract
U ovom radu sintetizirano je 4 fazno čistih čvrstih otopina cerij-cirkonij oksida dopiranih s 10 mol% europija. Dopiranje cirkonija i europija u kristalnu rešetku cerijeva(IV) oksida dovodi do povećanja katalitičke aktivnosti te termičke stablinosti katalizatora. Cerijev dioksid je široko upotrebljivani spoj u raznim katalitičkim reakcijama, između ostalih i fotokatalitičkim reakcijama. Zbog miješanog valentnog stanja (Ce3+/4+), dolazi do brze izmijene elektrona te do zavidnih redoks svojstava, koji se dodatno mogu poboljšati dopiranjem drugih elemenata u kristalnu rešetku, najčešće drugih lantanoida i/ili prijelaznih metala manjeg ionskog radijusa (Zr, Y). Sintetizirani uzorci su okarakterizirani koristeći rentgensku difrakciju na prahu, termogravimetrijsku analizu te IR spektroskopiju, dok je fotokatalitička aktivnost praćena na UV/VIS spektrofotometru s halogenom lampom od 20 W. Fotokatalitička aktivnost je praćena na razgradnju 3 AZO boje, od kojih je primjećena najbolja razgradnja na metil crveno (40% kroz 15 minuta).
Abstract (english)
In this work, 4 phase-pure solid solutions of ceria-zirconia doped with 10 mol% europium were synthesized. Doping zirconium and europium into the crystal lattice of cerium(IV) oxide leads to an increase in catalytic activity and thermal stability of the catalyst. Cerium dioxide is a widely used compound in various catalytic reactions, including photocatalytic reactions. Due to the mixed valence state (Ce3+/4+), there is a rapid exchange of electrons and enviable redox properties, which can be additionally improved by doping other elements into the crystal lattice, usually other lanthanides and/or transition metals with a smaller ionic radius (Zr, Y). The synthesized samples were characterized using X-ray powder diffraction, thermogravimetric analysis and IR spectroscopy, while the photocatalytic activity was monitored on a UV/VIS spectrophotometer using a 20 W halogen lamp. The photocatalytic activity was monitored for the degradation of 3 AZO dyes, of which the best degradation was observed on methyl red (40% in 15 minutes).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:967885
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2022-11-02 12:06:46