Priprema i ispitivanje fotokatalitičke aktivnosti fotokatalizatora aktivnih pod Sunčevim zračenjem

master's thesis

• Title (english): Preparation and investigation of the photocatalytic activity of a solar-active photocatalyst
• Author: Dorotea Piškor
• Mentor: Hrvoje Kušić (mentor)
• Committee member: Hrvoje Kušić (predsjednik povjerenstva)
• Committee member: Marin Kovačić (član povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Sve veća prisutnost farmaceutika u okolišu izaziva zabrinutost istraživača, stoga se pokušava pronaći adekvatan način smanjenja takvog onečišćenja. Jedan od razloga za zabrinutost uslijed prisutnosti antibiotika u okolišu općenito je razvoj rezistentnih sojeva patogenih bakterija. Napredne oksidacijske tehnologije, a osobito fotokatalitički procesi, su perspektivno rješenje za uklanjanje farmaceutskih onečišćivala iz otpadnih voda. Titanijev dioksid (TiO2) kao fotokatalizator intenzivno se istražuje za primjenu u procesima pročišćavanja otpadnih voda. U takvim procesima koristi se kao fotokatalizator, za fotokatalitičku razgradnju brojnih onečišćivala. TiO2 se pojavljuje u trima kristalnim oblicima: anatas, rutil i brukit; pri čemu fotokatalitičku aktivnost pokazuju anatas i rutil. Zbog svoje velike zabranjene zone TiO2 apsorbira samo UV svjetlost, koja čini svega oko 5% ukupnog Sunčevog zračenja. Kako bi se povećala aktivnost TiO2 u vidljivom dijelu spektra Sunčevog zračenja TiO2 se modificira dopiranjem metalima i nemetalima te stvaranjem heterojunkcijskih kompozita. U ovome radu prikazan je literaturni pregled postupaka modifikacije TiO2 s ciljem smanjenja širine zabranjene zone i povećanjem aktivnosti pod vidljivim zračenjem.

Abstract (english)

The presence of pharmaceuticals in the environment is a reason for concern for researchers, therefore an adequate method for reducing this type of pollution needs to be discovered. One of the reasons for concern about the presence of antibiotics in the environment generally, is the development of resistant strains of pathogen bacteria. Advanced oxidation processes, especially photocatalytic processes are prospective solution for the removal of pharmaceuticals from waste waters. Titanium dioxide (TiO2), as a photocatalyst, is being researched intensively in the operations of waste water treatment. In these processes, it is being used as photocatalyst, for photocatalytic degradation of many pollutants. TiO2 is present in three main crystal forms: anatase, rutile and brookite; while anatase and rutile showing photocatalytic activity. However due to its prohibitively large band gap, TiO2 absorbs only UV light, which makes only 5% of total sunlight. In order to increase the activity of TiO2 in the visible part of the spectrum, it needs to be doped with metals and nonmetals or heterojunctions composites need to be generated. In this work, a literature overview of TiO2 modifications for band gap narrowing and enhancement of activity under visible light is presented.

• Keywords: fotokataliza; farmaceutska mikroonečišćivala; višekomponentni fotokatalizator; titanijev dioksid
• Keywords (english): photocatalysis; pharmaceutical micropollutants; multicomponent photocatalyst; titanium dioxide
• Language: croatian
• URN:NBN: urn:nbn:hr:149:189749
• Project: Number: IP-2018-01-1982; Title: Nano-katalizatori aktivirani Sunčevim zračenjem u tehnologijama zaštite okoliša; Title: Nano-sized solar-active catalysts for environmental technologies; Acronym: NaSCEnT; Leader: Hrvoje Kušić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Project: Number: KK.01.1.1.04.0001; Title: Pročišćavanje vode i dobivanje energije korištenjem novih kompozitnih materijala uz Sunčevo zračenje; Leader: Hrvoje Kušić; Jurisdiction: eu; Funder: EC; Funding stream: KF
• Study programme: Title: Materials Science and Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-03-06 17:51:32