Elektrokemijska sinteza WO3 i njegova primjena u fotoelektrokemijskom procesu razgradnje farmaceutika

undergraduate thesis

• Title (english): Elektrochemical synthesis of WO3 and its application in photoelectrochemical degradation of pharmaceuticals
• Author: Karla Stjepanović
• Mentor: Marijana Kraljić Roković (mentor)
• Committee member: Marijana Kraljić Roković (predsjednik povjerenstva)
• Committee member: Jozefina Katić (član povjerenstva)
• Committee member: Iva Movre Šapić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2024-02-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Cilj ovog rada bio je izraditi FTO/WO3 elektrode, elektrokemijskom sintezom WO3 fotokatalizatora te okarakterizirati izrađene FTO/WO3 elektrode raznim elektrokemijskim tehnikama. Elektrokemijska sinteza WO3 fotokatalizatora provedena je redukcijom peroksovolframove kiseline. Karakterizacija izrađenih FTO/WO3 elektroda provedena je praćenjem potencijala otvorenog kruga, elektrokemijskom impedancijskom spektroskopijom, Mott-Schottky analizom, linearnom polarizacijom i kronoamperometrijom. Karakterizacije izrađenih FTO/WO3 elektroda provedene su u 0,5 mol dm^-3 elektrolitnoj otopini Na2SO4. Osvjetljenje FTO/WO3 elektroda provedeno je primjenom LED lampe. Nadalje, drugi cilj ovog rada bio je odrediti djelotvornost razgradnje farmaceutika amoksicilina fotoelektrokemijskim procesom uz izrađenu FTO/WO3 elektrodu. Dobiveni rezultati karakterizacije FTO/WO3 elektroda pokazali su da je fotoaktivnost najveća kod Elektrode 2, a najmanja kod
Elektrode 1. Stoga je razgradnja farmaceutika amoksicilina fotoelektrokemijskim procesom provedena pomoću Elektrode 2. Fotoelektrokemijski proces se odvijao pri 0,8 V, tijekom
90 minuta u 0,1 mmol dm^-3 otopini amoksicilina u 0,1 mmol dm^-3 elektrolitnoj otopini Na2SO4. Djelotvornost razgradnje farmaceutika amoksicilina fotoelektrokemijskim procesom određena je HPLC analizom te je iznosila 87,41%.

Abstract (english)

The aim of this study was to prepare FTO/WO3 electrodes by electrochemical synthesis of WO3 photocatalyst and to characterize the prepared FTO/WO3 electrodes using various electrochemical techniques. Electrochemical synthesis of WO3 photocatalyst was carried out by reduction of peroxotungstic acid. The characterization of prepared FTO/WO3 electrodes was performed by the open circuit potential measurement, electrochemical impedance spectroscopy, Mott-Schottky analysis, linear polarization and chronoamperometry. The characterizations of prepared FTO/WO3 electrodes were carried out in 0.5 mol dm^-3 Na2SO4 electrolyte solution. The FTO/WO3 electrodes were illuminated using an LED lamp. Furthermore, another aim of this study was to determine the degradation efficiency of amoxicillin pharmaceutical in the photoelectrochemical process using the prepared
FTO/WO3 electrode. The obtained results for characterization of the FTO/WO3 electrodes indicated that the photoactivity is highest for Electrode 2 and lowest for Electrode 1. Therefore, the degradation of the amoxicillin pharmaceutical in the photoelectrochemical process was carried out using Electrode 2. The photoelectrochemical process was carried out at 0.8 V for 90 minutes in a 0.1 mmol dm^-3 amoxicillin solution in 0.1 mmol dm^-3 Na2SO4 electrolyte solution. The degradation efficiency of amoxicillin pharmaceutical in the photoelectrochemical process was determined by HPLC analysis and amounted to 87.41%.

• Keywords: elektrokemijska sinteza; fotokatalizator; volframov (VI) oksid; fotoelektrokemijski proces; farmaceutik
• Keywords (english): electrochemical synthesis; photocatalyst; tungsten (VI) oxide; photoelectrochemical process; pharmaceutical
• Language: croatian
• URN:NBN: urn:nbn:hr:149:465484
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-01-01
• Created on: 2024-02-26 09:30:16