Fotokatalitička aktivnost nanokompozita polipirol/cinkov oksid

master's thesis

• Title (english): Photocatalytic activity of polypyrrole/zinc oxide nanocomposites
• Author: Sniježana Šuka
• Mentor: Ljerka Kratofil Krehula (mentor)
• Committee member: Ljerka Kratofil Krehula (predsjednik povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

U ovom je radu istražena fotokatalitička aktivnost sintetiziranih kompozita vodljivog polimera polipirola i cinkovog oksida (PPy/ZnO). Cilj rada bio je ispitati fotokatalitičku aktivnost kompozita PPy/ZnO pod ultraljubičastim (UV) te simuliranim Sunčevim zračenjem pri razgradnji azo-bojila Reactive Red 45 u otpadnim vodama. Uzorci su pripremljeni polimerizacijom iz monomera pirola (Py) u prisustvu cinkovog oksida te oksidansa željezova (III) klorida (FeCl3); uz molarni omjer monomera i oksidansa 1:1 te različito vrijeme sinteze (90, 180 i 270 minuta). Istraživani uzorci okarakterizirani su infracrvenom spektroskopijom s Fourierovom transformacijom (FTIR) i UV/Vis spektroskopijom. Efikasnost fotokatalitičke razgradnje organskog azo bojila (Reactive Red 45), odnosno stupanj njegova uklanjanja iz vodene otopine, praćena je mjerenjem apsorbancije UV/Vis spektroskopijom. Fotokatalizator PPy/ZnO 90 min pokazao je visoku učinkovitost razgradnje bojila pri UV-A zračenju dok je pod djelovanjem Sunčevog zračenja njegova učinkovitost niska.

Abstract (english)

This work studies the photocatalytic activity of synthesized conductive polymer polypyrrole/zinc oxide nanocomposites (PPy/ZnO). The aim of this study was to examine the photocatalytic activity of composites PPy/ZnO under ultraviolet (UV) and simulated solar radiation in a degradation process of azo dye Reactive Red 45 in the wastewater. The composite samples were prepared during a polymerization process of monomer polypyrrole (PPy) in the presence of zinc oxide (ZnO) and oxidant iron(III) chloride (FeCl3) where the concentration ratio of monomer:oxidant was 1:1 and the duration of synthesis was 90, 180 and 270 min. The samples were characterized by infrared spectroscopy with Fourier transformation (FTIR) and UV/Vis spectroscopy. The efficiency of decomposition of organic azo dye (Reactive Red 45), i.e. the extent of its removal from aqueous solution, was monitored by measuring the absorbance by UV/Vis spectroscopy. Photocatalyst PPy/ZnO 90 min showed very high efficiency under UV-A radiation while its efficiency is low under the solar radiation.

• Keywords: fotokataliza; nanokompoziti; polipirol; cinkov oksid
• Keywords (english): photocatalysis; nanocomposites; polypyrrole; zinc oxide
• Language: croatian
• URN:NBN: urn:nbn:hr:149:961241
• 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
• Repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb
• Created on: 2017-11-02 12:14:43