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master's thesis
Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. urn:nbn:hr:149:823538
Bukovčan, Ivana
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

Bukovčan, I. (2019). Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:823538

Bukovčan, Ivana. "Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:149:823538

Bukovčan, Ivana. "Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:149:823538

Bukovčan, I. (2019). 'Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 11 July 2024, https://urn.nsk.hr/urn:nbn:hr:149:823538

Bukovčan I. Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2019 [cited 2024 July 11] Available at: https://urn.nsk.hr/urn:nbn:hr:149:823538

I. Bukovčan, "Utjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:149:823538

Metadata
TitleUtjecaj parametara priprave na fotokatalitičku aktivnost ZnO prevlaka
Title (english)Influence of synthesis parameters on photocatalytic activity of ZnO coatings
AuthorIvana Bukovčan
MentorJelena Macan (mentor)
Committee memberJelena Macan (predsjednik povjerenstva)
Committee memberDavor Dolar (član povjerenstva)
Committee memberZvonimir Katančić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2019-09-24, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Abstract
U ovom radu eksperimentalno je ispitan utjecaj parametara priprave ZnO prevlaka na njihovu fotokatalitičku aktivnost kod razgradnje zagađivala iz vode. Kao modelno zagađivalo korištena je 2,5-dihidroksibenzojeva kiselina koja je metabolički produkt razgradnje acetilsalicilne kiseline. Prevlake ZnO dobivene su metodom kemijskog taloženja iz otopine cinkova acetata dihidrata u metanolu, pri dvije kombinacije parametara priprave (temperatura, koncentracija matične otopine i vrijeme stajanja u sušioniku). Pri tom nastaje slojeviti bazični cinkov acetat (LBZA) koji potom žarenjem u peći prelazi u čisti ZnO, zadržavajući morfologiju LBZA. SEM analiza potvrdila je cvjetićavu strukturu prevlaka. Ispitane su tri temperature žarenja. Kao izvori svjetlosti kod fotokatalitičke reakcije korišteni su UV lampa i sunčeva svjetlost, a promjena koncentracije zagađivala praćena je pomoću UV/Vis spektrofotometrije. Sustavi su pokazali manje ili više pravilno smanjenje koncentracije zagađivala, što potvrđuje fotokatalitičko djelovanje ZnO. Iz rezultata je teško odabrati optimalne uvjete priprave za fotokatalitičku primjenu, odnosno nije uočen utjecaj istih na fotokatalitičku aktivnost. Fotodegradacija zagađivala pod sunčevom svjetlosti pokazala se približno jednako djelotvornom kao i pod UV lampom što pokazuje potencijal ovakvih sustava za pročišćavanje voda na otvorenom.
Abstract (english)
In this thesis, the influence of synthesis parameters of ZnO films on their photocatalytical activity for degradation of water pollutants was experimentally tested. 2,5-dihidroxybenzoic acid, which is a metabolic product of acetylsalicylic acid degradation, was used as a model pollutant. ZnO coatings were prepared by chemical bath deposition method from an alcoholic solution of zinc acetate dihydrate, at two different combinations of preparation parameters (temperature, initial Zn concentration and time). Layered Basic Zinc Acetate (LBZA) is formed and then transformed to pure ZnO by calcining, keeping its LBZA morphology. The obtained films had flower-like structure, which was confirmed by SEM analysis. Three calcining temperatures were examined. UV lamp and sunlight were used as light sources in photocatalytic reaction, and change in pollutant concentration was monitored by UV/Vis spectrophotometry. The result was more or less regular concentration reduction, which confirms the photocatalytic activity of ZnO. It is difficult to choose the optimum preparation conditions for photocatalytic application based on the results. The specific influence of the synthesis parameters on photocatalytic activity was not observed. Photodegradation of the given pollutant was approximately as effective under sunlight as under the UV lamp, showing the potential of such outdoor water purification systems.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:823538
ProjectNumber: IP-2018-01-5246
Title: Nanokompoziti s perovskitima za fotovoltaike, fotokatalizu i senzoriku
Acronym: NanoPeroPhotoSens
Leader: Andreja Gajović
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Environmental chemistry and green technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-02-16 13:33:05