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master's thesis
Sonokemijska sinteza i karakterizacija nanočestica ZrO2
2022. urn:nbn:hr:182:918860
Ćorić, Ivan
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry

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Ćorić, I. (2022). Sonokemijska sinteza i karakterizacija nanočestica ZrO2 (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:918860

Ćorić, Ivan. "Sonokemijska sinteza i karakterizacija nanočestica ZrO2." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2022. https://urn.nsk.hr/urn:nbn:hr:182:918860

Ćorić, Ivan. "Sonokemijska sinteza i karakterizacija nanočestica ZrO2." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2022. https://urn.nsk.hr/urn:nbn:hr:182:918860

Ćorić, I. (2022). 'Sonokemijska sinteza i karakterizacija nanočestica ZrO2', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 25 April 2024, https://urn.nsk.hr/urn:nbn:hr:182:918860

Ćorić I. Sonokemijska sinteza i karakterizacija nanočestica ZrO2 [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2022 [cited 2024 April 25] Available at: https://urn.nsk.hr/urn:nbn:hr:182:918860

I. Ćorić, "Sonokemijska sinteza i karakterizacija nanočestica ZrO2", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:182:918860

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Metadata
TitleSonokemijska sinteza i karakterizacija nanočestica ZrO2
Title (english)Sonochemical synthesis and characterization of ZrO2 nanoparticles
AuthorIvan Ćorić
MentorElvira Kovač-Andrić (mentor)
Committee memberTomislav Balić (predsjednik povjerenstva)
Committee memberElvira Kovač-Andrić (član povjerenstva)
Committee memberVlatka Gvozdić (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry)
Osijek
Defense date and country2022-09-09, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Inorganic Chemistry
Abstract
Nanočestice imaju široku primjenu zahvaljujući svojim dimenzijama (1 – 100 nm) i svojstvima. Jedna od učinkovitijih metoda njihove sinteze je sonokemijska sinteza. Cilj ovog rada je odrediti utjecaj trajanja sinteze, amplitude i trajanja pulsa ultrazvukom potpomognute sinteze na konačni omjer faza i veličinu kristalita nanočestica ZrO2. Za sintezu korišteni su ZrO(NO3)2 · xH2O i etilendiamin u vodenom mediju. U literaturnom pregledu opisan je ultrazvuk i sonokemijska sinteza, njezine sastavnice i mehanizam. Detaljno je opisana kavitacija, cirkonijev dioksid i njegove faze. FT-IR analiza prekursora (prije kalcinacije) ne pokazuje prisutnost OH skupine hidroksida i upućuje na nastanak hidratiziranih oksida. Nakon kalcinacije može se uočiti maksimum pri 504 cm-1 koji pripada istezanju Zr – O. FT-IR analizom utvrđeno je da je kvalitativni sastav prekursora (i kalciniranih uzoraka) jednak i ne ovisi o parametrima sinteze. Kvantitativna PXRD analiza pokazuje prisutnost monoklinske i tetragonske faze ZrO2 u uzorcima nakon kalcinacije. Povećani udio monoklinske faze detektiran je u uzorcima sonificiranim do 15 min i uzorcima s sonificiranim pulsom ultrazvuka u trajanju od 1 i 2 s. Čista tetragonska faza nastaje isključivo u uzorku sonificiranom 30 min. Utjecaj na veličinu kristalita nije zapažen. Usprkos prisutnosti dviju faza TEM analiza pokazuje sličnost u veličinama kristalita
Abstract (english)
Dimensions and properties of nanoparticles enables their wide application. Sonochemical synthesis is effective method for their preparation. The aim of this work is to determine the influence of synthesis duration, amplitude and pulse duration of ultrasound assisted synthesis on the final phase ratio and crystallite size of ZrO2 nanoparticles. ZrO(NO3)2 · xH2O and ethylenediamine were used for synthesis in an aqueous media. In theoretical part we discussed ultrasound, sonochemical synthesis, its components and mechanism. Cavitation, zirconia and its phases were discussed. FT-IR analysis of precursors doesn't show presence of hydroxide OH group and refers to synthesis of hydrated oxides. After calcination peak at 504 cm-1 is present (Zr – O stretching). FT-IR analysis shows same qualitative composition of precursors (and calcinated samples) so it doesn't depend on synthesis parameters. Quantitative PXRD analysis show presence of monoclinic and tetragonal ZrO2 phases in samples after calcination. Increased share of monoclinic phase was detected in samples sonicated up to 15 min and samples sonicated with ultrasound pulse of 1 – 2 s. Pure tetragonal phase is present only in a sample sonicated for 30 min. Influence on crystallite size was not detected. Even though there are two phases present, TEM analysis shows similar crystallite sizes
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:918860
Study programmeTitle: Graduate University Study of Chemistry; research program; specializations in: Research program
Course: Research program
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-11-02 12:01:10