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undergraduate thesis
Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. urn:nbn:hr:159:528655
Horvat, Dario
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Chemistry and Biochemistry
Laboratory for General and Inorganic Chemistry and Electroanalysis

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Horvat, D. (2023). Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:528655

Horvat, Dario. "Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:528655

Horvat, Dario. "Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:528655

Horvat, D. (2023). 'Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:159:528655

Horvat D. Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2023 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:159:528655

D. Horvat, "Optimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:159:528655

Metadata
TitleOptimiranje uvjeta laserske pirolize u svrhu dobivanja pirolitičkih ugljika za primjenu u bioelektrokatalizi
Title (english)Optimization of laser pyrolysis conditions for the purpose of obtaining pyrolytic carbons for use in bioelectrocatalysis
AuthorDario Horvat
MentorDamir Iveković (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Chemistry and Biochemistry)
(Laboratory for General and Inorganic Chemistry and Electroanalysis)
Zagreb
Defense date and country2023-09-14, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
U ovom radu provedeni su preliminarni eksperimenti koji su za cilj imali utvrditi može li se lignosulfonat, kao otpadni produkt iz proizvodnje papira, iskoristiti kao polazna sirovina za dobivanje pirolitičkog ugljika postupkom laserske pirolize. Za dobivanje lignosulfonatnog filma zadovoljavajućih karakteristika korištene su smjese saharoze i lignosulfonata, prethodno hidrotermalno tretirane pri 180 °C tijekom 4 sata. Karakterizacija dobivenih hidrotermalnih produkata provedena je UV-Vis i FTIR spektroskopijom, a morfološka svojstva dobivenih karboniziranih produkata i lignosulfonatnih filmova istražena je pretražnom elektronskom mikroskopijom (SEM). Pirolizom lignosulfonatnih filmova fokusiranim laserskim snopom CO₂ lasera (P = 12500 W/cm² ) priređeni su tanki filmovi pirolitičkog ugljika velike poroznosti i specifične površine. Pokazano je da je morfologija dobivenih filmova pirolitičkog ugljika neovisna o načinu pripreme lignosulfonatnog filma, što ukazuje na suštinski jednak proces pirolize filmova. Zbog velike specifične površine, priređeni filmovi obećavajući su materijal za imobilizaciju biokatalizatora i pripremu biokatalitičkih elektroda.
Abstract (english)
In this work, preliminary experiments were conducted with the aim to determine whether lignosulfonate, as a waste product from the paper industry, can be used as a starting material for preparation of pyrolytic carbon by laser pyrolysis. To obtain a lignosulfonate film with satisfactory characteristics, sucrose and lignosulfonate mixtures were used, previously hydrothermally treated at 180 °C for 4 hours. The characterization of the obtained hydrothermal products was carried out by UV-Vis and FTIR spectroscopy, and the morphological properties of the obtained carbonized products and lignosulfonate films were investigated by scanning electron microscopy (SEM). By pyrolizing the lignosulfonate films with the focused laser beam of a CO₂ laser (P = 12500 W/cm² ), thin films of pyrolytic carbon with high porosity and specific surface area were prepared. It was shown that the morphology of the obtained pyrolytic carbon films is independent on the method of preparation of the lignosulfonate film, which indicates that the pyrolysis process is essentially equal for all films. Due to the large specific surface area, the prepared films are a promising material for the immobilization of biocatalysts and the preparation of biocatalytic electrodes
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:528655
Study programmeTitle: Biotechnology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2024-04-29 08:51:13