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undergraduate thesis
Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. urn:nbn:hr:149:141075
Tominac, Petra
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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Tominac, P. (2017). Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:141075

Tominac, Petra. "Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:141075

Tominac, Petra. "Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:141075

Tominac, P. (2017). 'Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 14 October 2024, https://urn.nsk.hr/urn:nbn:hr:149:141075

Tominac P. Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2017 [cited 2024 October 14] Available at: https://urn.nsk.hr/urn:nbn:hr:149:141075

P. Tominac, "Fotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:149:141075

Metadata
TitleFotokatalitička razgradnja metilenskog plavila na titanatnim nanocjevčicama
Title (english)Photocatalytic decomposition of methylene blue on titanate nanotubes
AuthorPetra Tominac
MentorStanislav Kurajica (mentor)
Committee memberStanislav Kurajica (predsjednik povjerenstva)
Committee memberDavor Dolar (član povjerenstva)
Committee memberDajana Milovac (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2017-07-11, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Materials
Abstract
Istraživana je adsorpcija i fotokatalitički raspad modelnog zagađivala, metilenskog plavila, na pripravljenim i naknadno termički obrađenim titanatnim nanocjevčicama. Utvrđeno je da termička obrada pri 250 °C u trajanju od 2 h poboljšava adsorpcijska i fotokatalitička svojstva titanatnih nanocjevčica. Model pseudo drugog reda pokazao se najprikladnijim za opis kinetike adsorpcije metilenskog plavila na titanatne nanocjevčice. Utvrđeno je da afinitet titanatnih nanocjevčica prema metilenskom plavilu iznosi od 48,45 mg g^-1 za nanocjevčice koje nisu naknadno termički obrađivane i 95,24 mg g^-1 za termički obrađene nanocjevčice. U oba slučaja ravnotežna adsorpcija ostvarena je u roku od 120 min. Adsorpcijski proces u oba je uzorka kontroliran unutarčestičnom difuzijom i površinskom sorpcijom ali je doprinos površinske sorpcije veći u slučaju termički obrađenog uzorka. Utvrđeno je da je model pseudo prvog reda prihvatljiv za opis kinetike fotokatalitičke degradacije boje na titanatnim nanocjevčicama. Pokazalo se da termička obrada blago povećava fotokatalitičku aktivnost titanatnih nanocjevčica.
Abstract (english)
Adsorption and photocatalytic decomposition of methylene blue, used as a model pollutant, on as–prepared and calcined titanate nanotubes have been studied. It was established that calcination at 250 °C for 2 h improves the adsorption and photocatalytic properties of titanate nanotubes. It was shown that pseudo–second–order model was the most appropriate to describe adsorption kinetics of methylene blue on titanate nanotubes. Affinity toward methylene blue of 48.45 mg g^-1 and 95.24 mg g^-1 has been established for as–prepared and calcined titanate nanotubes, while equilibrium adsorption was attained in 120 min. Adsorption process is controlled by intraparticle diffusion and surface sorption in both samples, but the contribution of surface sorption is greater for the calcined sample. The pseudo–first–order kinetic is an acceptable model for photocatalytic dye degradation process on titanate nanotubes. It was shown that the calcination slightly increased the photocatalytic activity of titanate nanotubes.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:141075
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Applied organic chemistry
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 on2021-01-05 12:02:19