Imobilizacija TiO2 na čvrsti nosač - karakterizacija i fotokatalitička aktivnost

master's thesis

• Title (english): TiO2 immobilization on solid support - characterization and photocatalytic activity
• Author: Marija Borovac
• Mentor: Sanja Papić (mentor)
• Committee member: Sanja Papić (predsjednik povjerenstva)
• Committee member: Ivan Brnardić (član povjerenstva)
• Committee member: Ivana Grčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Environmental Protection in Chemical Engineering

Abstract

U ovom radu istraživana je fotokatalitička razgradnja salicilne kiseline (SA) s TiO2 fotokatalizatorom suspendiranim i imobiliziranim na odabrane čvrste nosače. Sol gel sintezom pripravljena je TiO2 suspenzija koja je nanesena na mrežice od staklenih vlakana i na dvije vrste pamučnog materijala. Fotokatalitički eksperimenti provedeni su na četvrtastom, šaržnom reaktoru s recirkulacijom s dva različita volumena reakcijske otopine. Kao izvor svjetlosnog zračenja korištene su dvije UV-A lampe različitog inteziteta zračenja. Uspješnost nanošenja fotokatalizatora na pamuk i staklena vlakna potvrđena je pretražnom elektronskom mikroskopijom (SEM). Koncentracija SA tijekom fotokatalitičkog procesa određena je tekućinskom kromatografijom visoke djelotvornosti (HPLC). Ustanovljena je podjednaka fotokatalitička aktivnost imobiliziranog TiO2 u 3 provedena ciklusa. Maksimalno postignuta razgradnja SA je 94% sa suspendiranim TiO2, 72,3% s TiO2/pamuk i 68,4% s TiO2/staklene mrežice kod danih reakcijskih uvjeta.

Abstract (english)

The aim of this study was to investigatephotocatalytic degradation of salicylic acid with photocatalyst TiO2which was suspended and immobilized using selected solid carriers. Sol- gel synthesis was used to preparethe TiO2suspension applied on the fiberglass meshes and two kinds of cotton material.Photocatalytic experiments were conducted in square batch reactor with recirculation in two different volumes of reaction solution.Two UV-A lamps of different radiation intensity were used as a source of light radiation. Scanning Electron Microscopy (SEM) confirmed the success of applying photocatalyst on the cotton and fiberglass meshes. Concentration of salicylic acid during the photocatalytic process was determined by using High Performance Liquid Chromatography(HPLC). Almost equal photocatalytic activity of immobilized TiO2was established in three conducted cycles.Maximum achieved degradation of salicylic acid is 94% with suspended TiO2, 72,3% with TiO2/cotton and 68,4% withTiO2/fiberglass meshes with given reaction conditions.

• Keywords: TiO2 fotokataliza; imobilizacija TiO2; salicilna kiselina; sol-gel metoda; TiO2/pamuk; TiO2/staklena mrežica
• Keywords (english): TiO2 photocatalysis; immobilization of TiO2; salicylic acid; sol-gel method; TiO2/cotton; TiO2/fiberglass meshes
• Language: croatian
• URN:NBN: urn:nbn:hr:149:017959
• Study programme: Title: Environmental Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka ekoinženjerstva (magistar/magistra inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-21 13:28:05