Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana

Goman, Dominik

prikaz prve stranice dokumenta Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana

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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

Cite this document

APA 6th Edition

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

MLA 8th Edition

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

Chicago 17th Edition

Harvard

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 16 January 2021, https://urn.nsk.hr/urn:nbn:hr:182:390842

Vancouver

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 2021 January 16] Available at: https://urn.nsk.hr/urn:nbn:hr:182:390842

IEEE

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

Cite this item: https://urn.nsk.hr/urn:nbn:hr:182:390842

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Title	Optimizacija hidrotermalne metode za sintezu složenih metalnih oksida na bazi mangana
Title (english)	Optimization of hydrothermal method towards synthesis of complex metal oxides containing manganese
Author	Dominik Goman
Mentor	Igor Đerđ (mentor)
Mentor	Anamarija Stanković (komentor)
Committee member	Igor Đerđ (predsjednik povjerenstva)
Committee member	Elvira Kovač-Andrić (član povjerenstva)
Committee member	Anamarija Stanković (član povjerenstva)
Granter	Josip Juraj Strossmayer University of Osijek Department of Chemistry Osijek
Defense date and country	2020-09-11, 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)
Language	croatian
URN:NBN	urn:nbn:hr:182:390842
Project	Number: HRZZ-IP-2016-06-3115 Title: Istraživanje složenih multiferoičnih materijala pripravljenih metodama otopinske kemije Leader: Igor Đerđ Jurisdiction: Croatia Funder: HRZZ
Study programme	Title: 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 resource	Text
File origin	Born digital
Access conditions	Open access
Terms of use
Repository	Repository of the Department of Chemistry, Osijek
Created on	2020-10-30 10:29:28

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