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master's thesis
Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. urn:nbn:hr:149:234543
Grbešić, Tea
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Grbešić, T. (2021). Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:234543

Grbešić, Tea. "Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:234543

Grbešić, Tea. "Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:234543

Grbešić, T. (2021). 'Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 02 October 2024, https://urn.nsk.hr/urn:nbn:hr:149:234543

Grbešić T. Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2021 [cited 2024 October 02] Available at: https://urn.nsk.hr/urn:nbn:hr:149:234543

T. Grbešić, "Mehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:149:234543

Metadata
TitleMehanokemijska sinteza cerijeva(IV) oksida dopiranog manganom
Title (english)Mechanochemical synthesis of manganese-doped cerium(IV) oxide
AuthorTea Grbešić
MentorStanislav Kurajica (mentor)
Committee memberStanislav Kurajica (predsjednik povjerenstva)
Committee memberNevenka Vrbos (član povjerenstva)
Committee memberKrunoslav Žižek (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2021-07-15, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Abstract
Uzorci čistog i dopiranog cerijeva(IV) oksida (CeO2) s 10, 20 i 30% mangana pripravljeni su mehanokemijsokm sintezom i potom ispitivani različitim metodama karakterizacije. Kao prekursori korišteni su cerijev(III) klorid, manganov(II) klorid i natrijev karbonat dok je natrijev klorid korišten kao razrjeđivač koji odvaja čestice produkta te sprječava njihov daljnji rast. Uzorci pripravljeni mehanokemijskom sintezom istraživani su rendgenskom difrakcijom (XRD) te diferencijalnom toplinskom i termogravimetrijskom analizom (DTA/TGA). Nakon sinteze uzorci su termički obrađeni na 500 °C u trajanju 2 sata kako bi se iz produkata sinteze dobio CeO2. Obrađeni uzorci podvrgnuti su rendgenskoj difrakcijskoj analizi (XRD), infracrvenoj spektroskopiji s Fourierovom transformacijom (FTIR) i pretražnoj elektronskoj mikroskopiji (SEM). Katalitička aktivnost dobivenih uzoraka ispitana je na procesu oksidacije toluena u integriranom reaktoru s nepokretnim slojem katalizatora, a za detekciju toluena nakon oksidacije korištena je plinska kromatografija (GC).Rezultati su pokazali da mehanokemijskom sintezom, u sintezama s manganom, iz korištenih prekursora uz cerijev(IV) oksid nastaje i birnesit kao sekundarna kristalna faza. Dopiranje manganom dovodi do smanjenja veličine kristalita CeO2, ali ne dovodi do značajnih promjena u morfologiji kao ni katalitičkoj aktivnosti CeO2.
Abstract (english)
Pure ceria samples as well as 10, 20 and 30% manganese doped CeO2 were prepared via mechanochemical synthesis. The as-prepared samples were characterized using X-ray diffraction (XRD) and differential thermal and thermo-gravimetric analysis (DTA-TGA). After mechanochemical synthesis, samples were thermally treated at 500 °C for 2 h, to enable the transformation of synthesis products to CeO2. The thermally treated samples were characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Catalytic activity was tested on toluene oxidation process in an integral up-flow fixed bed reactor and for the detection of residual toluene after oxidation, gas chromatography (GC) was used. During mechanochemical synthesis of doped samples with the used precursors the formation of ceria occurs, along with birnessite as a secondary crystal phase. Doping with manganese caused a decrease in crystallite size. However, no significant differences in morphology or catalytic activity of CeO2 were observed.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:234543
ProjectNumber: IP-2018-01-2963
Title: Hidrotermalna sinteza dopiranog cerij oksidnog nanokatalizatora
Acronym: HOuDiNI
Leader: Stanislav Kurajica
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2023-04-07 09:41:18