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master's thesis
Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana
Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2020. urn:nbn:hr:182:390842
Goman, Dominik
Josip Juraj Strossmayer University of Osijek
Department of Chemistry

Institutional repository: Repository of the Department of Chemistry, Osijek

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Goman, D. (2020). Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:390842

Goman, Dominik. "Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2020. https://urn.nsk.hr/urn:nbn:hr:182:390842

Goman, Dominik. "Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2020. https://urn.nsk.hr/urn:nbn:hr:182:390842

Goman, D. (2020). 'Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 30 December 2024, https://urn.nsk.hr/urn:nbn:hr:182:390842

Goman D. Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2020 [cited 2024 December 30] Available at: https://urn.nsk.hr/urn:nbn:hr:182:390842

D. Goman, "Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:182:390842

Metadata
TitleOptimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana
Title (english)Optimization of hydrothermal method towards synthesis of complex metal oxides containing manganese
AuthorDominik Goman
MentorIgor Đerđ (mentor)
MentorAnamarija Stanković (komentor)
Committee memberIgor Đerđ (predsjednik povjerenstva)
Committee memberElvira Kovač-Andrić (član povjerenstva)
Committee memberAnamarija Stanković (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
Osijek
Defense date and country2020-09-11, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Sinteza složenih metalnih oksida predstavlja veliki izazov, posebice ako se u jednom konačnom materijalu kombinira više različitih svojstava kao što je to u slučaju multiferoika. Ovim radom istraživani su optimalni uvjeti za sintezu trostrukog perovskita \( Sr_{3}Mn_{2}WO_{9} \) hidrotermalnom metodom, koji dosad nije sintetiziran na taj način, niti je poznat kao nanomaterijal. Cilj samoga rada je bio optimizirati uvjete obzirom na temperaturu tijekom reakcije, početne prekursore te puferska sredstva. Tako su sinteze provedene na 150 °C i 200 °C, tijekom 24 h, uz izmjenu manganovih prekursora, \( Mn\left ( NO_{3} \right )_{2}\) ∙ \( 4H_{2}O\) te \( \left ( CH_{3}COO \right )_{3}Mn\) ∙ \( 2H_{2}O\), koristeći etanol i limunsku kiselinu kao puferska sredstva. Sintetizirani uzorci kalcinirani su na temperaturi od 950 °C te analizirani termogravimetrijski (TGA) i rentgenskom difrakcijom na prahu (PXRD). Također je elektrokemijski i spektroskopski analizirano ponašanje početnih prekursora otopljenih u vodi, nakon dodatka određene koncentracije mineralizatora NaOH. Najbolje rezultate i poklapanje rentgenskih maksimuma s referentnim \( Sr_{3}Fe_{2}WO_{9} \) dao je uzorak koji je sintetiziran pri 150 °C uz manganov prekursor \( Mn\left ( NO_{3} \right )_{2}\) ∙ \( 4H_{2}O\) te limunsku kiselinu za pufersko sredstvo.
Abstract (english)
The synthesis of complex metal oxides is a great challenge especially if several different properties are combined into one final material as in the case of multiferroics. This paper investigates the optimal conditions for the synthesis of triple perovskite \( Sr_{3}Mn_{2}WO_{9} \) by the hydrothermal method, which has not been synthesized in this way so far, nor it is known as a nanomaterial. The aim of this work was to optimize the conditions with respect to the temperature during the reaction, the initial precursors and buffering agents. Thus, the syntheses were performed at 150 °C and 200 °C for 24 h with exchange of manganese precursors, \( Mn\left ( NO_{3} \right )_{2}\) ∙ \( 4H_{2}O\) and \( \left ( CH_{3}COO \right )_{3}Mn\) · \( 2H_{2}O\), using ethanol and citric acid as buffering agents. The synthesized samples were calcined at 950 °C and analyzed by thermogravimetric (TGA) and powder X-ray diffraction (PXRD). The behavior of the initial precursors dissolved in water after the addition of a certain concentration of NaOH mineralizer was also analyzed electrochemically and spectroscopically. The best results and matching of XRD reflections with the reference \( Sr_{3}Fe_{2}WO_{9} \) were given by the sample synthesized at 150 °C with manganese precursor \( Mn\left ( NO_{3} \right )_{2}\) ∙ \( 4H_{2}O\) and citric acid as a buffering agent.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:390842
ProjectNumber: HRZZ-IP-2016-06-3115
Title: Istraživanje složenih multiferoičnih materijala pripravljenih metodama otopinske kemije
Leader: Igor Đerđ
Jurisdiction: Croatia
Funder: HRZZ
Study programmeTitle: Graduate University Study of Chemistry; research direction
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 on2020-10-30 10:29:28