Starenje fotokatalizatora na temelju titan(IV) oksida i ugljikovih nanocijevi

master's thesis

• Title (english): Aging of photocatalysis based on titanium(IV) oxide and carbon nanotubes
• Author: Toni Marić
• Mentor: Ivan Brnardić (mentor)
• Mentor: Igor Jajčinović (pomoć pri izradi, neposredni voditelj)
• Committee member: Tamara Holjevac Grgurić (predsjednik povjerenstva)
• Committee member: Ivan Brnardić (član povjerenstva)
• Committee member: Anita Štrkalj (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2020-10-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Onečišćenje vode postaje sve veći globalni problem.Jedan od problema predstavljaju mikroonečišćivačikoji zahtijevaju posebne uvjete pročišćavanja, a u tu skupinu onečišćivača spadaju farmaceutici. Jedan od učinkovitijih načina njihova uklanjanja su napredni oksidacijski procesi, u koje spada i fotokataliza. Za proces fotokatalize potreban je fotokatalizator koji će prilikom djelovanja UV zračenja stvoriti hidroksilne radikale. Jedan od najkorištenijih fotokatalizatora je TiO2, koji se radi poboljšavanja svojstava može kombinirati s ugljikovim nanocijevima.
U ovom radu su pripremljene dvije vrste fotokatalizatora, TiO2 i TiO2/MWCNT čije je uspješno vezanje na staklenu mrežicu potvrđeno SEM i EDS analizom. Fotokatalitička svojstva ispitana su prije i nakon starenja fotokatalizatora u vodi i zraku. Iz dobivenih rezultata je utvrđeno da starenjemfotokatalizatora njihova svojstva opadaju te se kao najbolji fotokatalizatoru ovome radu pokazao TiO2.

Abstract (english)

Water pollution is becoming an increasing global problem. One of the problems is posed by micro-pollutants that require special purification conditions. This group of contaminants includes pharmaceuticals. One of the most effective ways to remove them are advanced oxidation processes, which include photocatalysis. The process of photocatalysis requires a photocatalyst that will create hydroxyl radicals under the action of UV radiation. One of the most widely used photocatalysts is TiO2, which can be combined with carbon nanotubes to improve properties.
In this paper, two types of photocatalysts were prepared, TiO2 and TiO2 / MWCNT, whose successful binding to the glass mesh was confirmed by SEM and EDX analysis. Photocatalytic properties were investigated before and after aging of photocatalysts in water and air. From the obtained results, it was determined that with the aging of photocatalysts, their properties decrease, and TiO2 proved to be the best photocatalyst in this work.

• Keywords: fotokataliza; titan(IV) oksid (TiO2); MWCNT; starenje
• Keywords (english): photocatalysis; titanium(IV) oxide (TiO2); MWCNT; aging
• Language: croatian
• URN:NBN: urn:nbn:hr:115:932645
• Study programme: Title: Graduate study program Metallurgy; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-10-28 07:34:02