Ispitivanje fotokatalitičke djelotvornosti kompozita polipirol/titanijev dioksid pri vidljivom svjetlu

master's thesis

• Title (english): The study of photocatalytic efficiency of polypyrrole/titanium dioxide composites under visible light
• Author: Jasmina Stjepanović
• Mentor: Ljerka Kratofil Krehula (mentor)
• Committee member: Ljerka Kratofil Krehula (predsjednik povjerenstva)
• Committee member: Zlata Hrnjak-Murgić (član povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2017-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

U radu je provedena sinteza i karakterizacija kompozita polipirol/titanijev dioksid (PPy/TiO2). Kompoziti su sintetizirani reakcijama polimerizacije monomera pirola u prisutnosti TiO2 različite duljine trajanja (90, 180 i 270 minuta). Cilj ovog rada razvoj je polimernih kompozita polipirol/titanijev dioksid (PPy/TiO2) s proširenim fotokatalitičkim djelovanjem, pomaknutim k vidljivom području UV/Vis spektra Sunčeva zračenja, koji bi mogli poslužiti kao fotokatalizatori za razgradnju organskih onečišćenja u otpadnim vodama. Djelotvornost vodljivih polimernih kompozitnih fotokatalizatora PPy/TiO2 ispitana je tijekom fotokatalitičke razgradnje bojila Acid Blue 25 na UV-A svjetlu i simuliranom Sunčevom zračenju. Metode koje su korištene za karakterizaciju kompozita PPy/TiO2 bile su: FTIR spektroskopija, UV/Vis spektroskopija, termogravimetrijska analiza (TGA), pretražna elektronska mikroskopija (SEM) i transmisijska elektronska mikroskopija (TEM). Također, uzorcima je određena elektrovodljivost i ukupni sadržaj organskog ugljika (TOC). Iz rezultata je vidljivo da se naučinkovitijim, u procesu razgradnje bojila Acid Blue 25, pokazao uzorak kompozita PPy/TiO2 sintetiziran 270 minuta.

Abstract (english)

This work involves a synthesis and characterization of polypyrrole/titanium dioxide (PPy/TiO2) composites. Composites synthesis was carrierd out during a process of monomer pyrrole polymerization in the presence of TiO2 with different duration of polymerization reaction (90, 180 and 270 min). The aim od the study is a development od polymer composites of polypyrrole/titanium dioxide (PPy/TiO2) with expanded photocatalytic activity, towards the visible region of UV/Vis spectrum of solar radiation, which could be used as photocatalysts for degradation of organic impurities in wastewater. The efficiency of conductive polymer composite photocatalyst PPy/TiO2 was tested during photocatalytic degradation of dye Acid Blue 25 under UV-A light and simulated solar radiation. Methods that have been used for characterization of PPy/TiO2 composites were: FTIR spectroscopy, UV/Vis spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electroconductivity and total organic carbon content (TOC) of the samples were also determined. According to the results, the most effective composite in the process of Acid Blue 25 degradation is PPy/TiO2 synthesized for 270 min.

• Keywords: fotokatalitičko djelovanje; kompoziti; polipirol; titanijev dioksid
• Keywords (english): composites; photocatalytic activity; polypyrrole; titanum dioxide
• Language: croatian
• URN:NBN: urn:nbn:hr:149:118579
• 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: 2019-10-02 15:18:27