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undergraduate thesis
Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. urn:nbn:hr:149:692738
Gvozdanović, Tena
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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Gvozdanović, T. (2016). Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:692738

Gvozdanović, Tena. "Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:692738

Gvozdanović, Tena. "Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:692738

Gvozdanović, T. (2016). 'Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 23 July 2024, https://urn.nsk.hr/urn:nbn:hr:149:692738

Gvozdanović T. Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2016 [cited 2024 July 23] Available at: https://urn.nsk.hr/urn:nbn:hr:149:692738

T. Gvozdanović, "Elektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:149:692738

Metadata
TitleElektrokatalitička oksidacija fenolnih kiselina na površini elektrode od grafitne paste modificirane TiO2 nanočesticama
Title (english)Electrocatalytic oxidation of phenolic acids at the surface of TiO2 nanoparticle modified carbon paste electrode
AuthorTena Gvozdanović
MentorSanja Martinez (mentor)
Committee memberSanja Martinez (predsjednik povjerenstva)
Committee memberHelena Otmačić Ćurković (član povjerenstva)
Committee memberPetar Kassal (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2016-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Applied Chemistry
Abstract
Cilj ovog rada bio je utvrditi utjecaj umješavanja TiO2 nanočestica u elektrodu od grafitne paste na cikličke voltamograme fenolnih kiselina, odnosno njihovih derivata topivih i netopivih u vodi. Također cilj je bio osmisliti strategiju primjene nanočesticama modificirane elektrode u svrhu istraživanja antioksidativnog djelovanja fenolnih kiselina usporedbom sa antioksidativnim standardima. Kao vodotopivi antioksidativni standardi odabrane su mokraćna i askorbinska kiselina te je istražen njihov voltametrijski odziv na elektrodi od grafitne paste pri različitim koncentracijama i brzinama polarizacije, vremenima stajanja otopine na zraku. Istraživanja koja su uključivala galnu kiselinu, provedena su na istoj elektrodi, bez i sa 10 % TiO2 nanočestica umiješanih u grafitnu pastu. Kumarin i 7-hidroksi kumarin ispitivani su kao standardi netopivi u vodi, a kao primjeri u vodi netopivih antioksidansa, ispitivani su različiti heterociklički derivati kumarina. Netopivi antioksidansi umiješavani su u elektrodu bez i sa 10 % nanočestica TiO2. Na temelju dobivenih rezultata može se zaključiti o antioksidativnim svojstvima ispitivanih spojeva, njihovoj stabilnosti i elektrokatalitičkom utjecaju dodatka TiO2 nanočestica u grafitnu pastu na oksidaciju ispitivanih spojeva. Uočen je izrazit elektrokatalitički efekt kod spojeva otopljenih u vodi, a kod spojeva umiješanih u elektrodu, TiO2 nanočestice smanjuju strujni odziv.
Abstract (english)
The aim of this work was to establish the impact of mixing in TiO2 nanoparticles in carbon paste electrode on cyclic voltammograms of phenolic acids, with reference to their derivatives soluble and indissoluble in water. Moreover, the aim was to invent the strategy on the application of nanoparticles modified electrode for the purpose of researching antioxidant effect of phenolic acids compared to the antioxidant standards. There were chosen ascorbic and uric acid as water-soluble antioxidant standards and there was researched their voltammetric response on carbon paste electrode at different concentrations, polarization rates and solution standing time on the air. Researches that have included gallic acid are conducted on the same electrode, without and with 10 % TiO2 nanoparticles mixed in carbon paste. Coumarin and 7-hydroxycoumarin were tested as water-indissoluble standards, and as water-indissoluble antioxidants there were tested different heterocyclic derivatives of coumarin. Water-indissoluble antioxidants were mixed in electrode without and with 10 % TiO2 nanoparticles. Based on the given results, it could be concluded about antioxidant properties of tested compounds, their stability and electrocatalytic influence of TiO2 nanoparticles addition in carbon paste on oxidation of tested compounds. There was observed distinct electrocatalytic effect on water-soluble compounds, and on compounds mixed in electrode TiO2 nanoparticles decreased current response.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:692738
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
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Created on2018-02-14 11:27:32