prikaz prve stranice dokumenta Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina
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undergraduate thesis
Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. urn:nbn:hr:149:918483
Marković, Ivan
University of Zagreb
Faculty of Chemical Engineering and Technology

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

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Marković, I. (2022). Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:918483

Marković, Ivan. "Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:918483

Marković, Ivan. "Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:918483

Marković, I. (2022). 'Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:918483

Marković I. Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2022 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:149:918483

I. Marković, "Primjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:149:918483

Metadata
TitlePrimjena rGO/BiVO4 elektrode u fotoelektrokemijskoj razgradnji amoxicilina
Title (english)Application of rGO/BiVO4 electrode for the photoelectrochemical degradation of amoxicillin
AuthorIvan Marković
MentorMarijana Kraljić Roković (mentor)
Committee memberMarijana Kraljić Roković (predsjednik povjerenstva)
Committee memberZoran Mandić (član povjerenstva)
Committee memberIvana Panžić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2022-09-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Cilj ovog rada bio je ispitati fotoelektrokemijski proces degradacije amoksicilina čija je koncentracija 0,1 mmol dm^-3. Mjerenja su se odvijala na elektrodi sa nanokompozitom koji se sastoji od fotokatalizatora BiVO4 čiji su slojevi naneseni na sloj reduciranog grafenovog oksida (rGO). Mjerenja su provedena za osvijetljene i neosvijetljene elektrode, za što nam je kao izvor služila LED lampa. Za karakterizacije pojedinih elektroda korištena je metoda linearne polarizacije prije i nakon fotoelektrokemijskog procesa, dok se za praćenje samog fotoelektrokemijskog procesa koristila metoda kronoamperometrije. Rezultati su pokazali kako u prisutnosti svjetla dolazi do pojave fotostruja što govori da je došlo do uspješnog stvaranja parova elektron-šupljina. Dobivena mjerenja su također pokazala da radikali nastali u fotoelektrokemijskom procesu oksidiraju rGO. Mjerenja provedena metodom kronoamperometrije ukazuju kako je fotostruja stabilnija pri pH = 6 nego pri pH = 4 iz čega se može zaključiti da se aktivnost elektrode značajnije smanjuje pri nižim pH vrijednostima. Praćenje koncentracije amoksicilina HPLC metodom pokazalo je kako s vremenom dolazi do degradacije amoksicilina. Iako su tijekom ispitivanja metodom linearne polarizacije dobivene veće fotostruje uz deblji sloj BiVO4 tijekom razgradnje farmaceutika nisu zabilježene značajne razlike u brzini razgradnje kod različitih BiVO4 slojeva.
Abstract (english)
The goal of this work was to examine the photoelectrochemical degradation of amoxicillin, whose concentration is 0.1 mmol dm^-3. The measurements were carried out with an electron containing a BiVO4 photocatalyst. The layers of BiVO4 were applied over the reduced graphene oxide (rGO). Measurements were performed for illuminated and non-illuminated electrodes. LED lamp has been used as source of light. The linear polarisation method was used to characterize the electrodes before and after the photoelectrochemical process, while the chronoamperometry method has been used to follow the photoelectrochemical process. The results showed that photocurrent appears in the presence of light, which indicates that there was a successful formation of electron-hole pairs. Additionally, it is evident that radicals formed in the photoelectrochemical process oxidize rGO.The chronoamperometry method shows that the photocurrent is more stable at pH = 6 than at pH = 4 indicating that the activity of electrode decreases with pH decrease. Amoxycilline degradation in photoelectrochemical process was proved by HPLC method. Although linear polarisation shows that higher photocurrents were obtained for thicker layer of BiVO4, photoelectrochemical degradation does not show sigificant differences of pharmaceuticals degradation with different electrodes.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:918483
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2023-09-01
Terms of useLicence In copyright icon
Created on2023-03-06 13:24:29