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undergraduate thesis
Hidrotermalna sinteza bakrom dopiranog CeO2
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:726788
Božičević, Marin
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

Božičević, M. (2018). Hidrotermalna sinteza bakrom dopiranog CeO2 (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:726788

Božičević, Marin. "Hidrotermalna sinteza bakrom dopiranog CeO2." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:726788

Božičević, Marin. "Hidrotermalna sinteza bakrom dopiranog CeO2." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:726788

Božičević, M. (2018). 'Hidrotermalna sinteza bakrom dopiranog CeO2', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 09 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:726788

Božičević M. Hidrotermalna sinteza bakrom dopiranog CeO2 [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2018 [cited 2024 November 09] Available at: https://urn.nsk.hr/urn:nbn:hr:149:726788

M. Božičević, "Hidrotermalna sinteza bakrom dopiranog CeO2", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:726788

Metadata
TitleHidrotermalna sinteza bakrom dopiranog CeO2
Title (english)Hydrothermal synthesis of copper-doped ceria
AuthorMarin Božičević
MentorStanislav Kurajica (mentor)
Committee memberStanislav Kurajica (predsjednik povjerenstva)
Committee memberJuraj Šipušić (član povjerenstva)
Committee memberJelena Macan (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Materials
Abstract
Cerijev (IV) oksid (CeO2) najveću primjenu ima u katalitičkim reakcijama kao katalizator i kao nosač katalizatora u mnogim industrijskim procesima, a također i za smanjenje emisije štetnih plinova tako što katalizira reakcije oksidacije metana i ugljikovog monoksida. Dopiranje bakrom znatno poboljšava toplinsku stabilnost CeO2, što proširuje mogućnosti njegove primjene bez straha da će doći do prekomjernog sinteriranja. Hidrotermalnom sintezom pri 120 °C u vremenu od 16 h, uz korištenje 8 mol/L NaOH kao otapala dobiven je čisti CeO2, kao i bakrom dopirani CeO2 s molarnim udjelima bakra 5, 10, 15, 20, 25 te 30 %. Provedbom rendgenske difrakcijske analize (XRD) te infracrvene spektroskopije s Fourierovom transformacijom (FTIR) praćena je struktura produkata, veličina kristalita, parametar jedinične ćelije te način ugradnje bakra u strukturu CeO2. Iz podataka dobivenih eksperimentalnom analizom vidljivo je da se bakar ugrađuje u kristalnu rešetku CeO2 te zamjenjuje ione Ce4+ u unutrašnjosti rešetke, što rezultira smanjenjem veličine kristalita s povećanjem udjela bakra i to od 4,15 nm za čisti CeO2 do čak 3,1 nm za uzorak s 20 mol. % bakra. Iz difraktograma i FTIR spektara je vidljivo da s povećanjem udjela bakra ne dolazi do nastajanja nove faze koja bi ukazivala na formiranje CuO.
Abstract (english)
Ceria is mostly used in catalytic reactions both as catalyst and catalyst support in many industrial processes, and also to lower the emission of harmful gasses by catalyzing oxidation reactions of methane and CO. Adding copper as a doping material enhances the thermal stability, which leads to wider synthesis and processing options without fear of excessive sintering. Products of pure ceria and copper-doped ceria in 5, 10, 15, 20, 25 and 30 mol. % of copper were prepared by hydrothermal synthesis at 120 °C for 16 h, using 8 mol/L NaOH as solvent. Using X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR), the structure of products, crystallite size, unit cell constant and the way of embedding of copper into the CeO2 structure has been investigated. From the data obtained by experimental analyses it was clear that copper, as doping material, enters the ceria crystal structure and replaces Ce4+ ions, which results in smaller crystallite sizes by increasing molar fraction of copper, from 4,15 nm for pure ceria to 3,1 nm for sample with 20 mol. % of copper. From XRD patterns and FTIR spectra it is clear that no matter what molar fraction of copper was introduced into ceria, the CuO was not formed as a side product.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:726788
Study programmeTitle: Materials Science and Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2022-07-08 12:12:51