Referentna elektroda srebro/srebrov klorid bez unutarnjeg elektrolita temeljena na poli(vinil-butiralu)

undergraduate thesis

• Title (english): Silver/silver chloride reference electrode without internal electrolyte based on polyvinyl butyral
• Author: Hrvoje Vojvodić
• Mentor: Petar Kassal (mentor)
• Committee member: Petar Kassal (predsjednik povjerenstva)
• Committee member: Irena Ivanišević (član povjerenstva)
• Committee member: Igor Dejanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2023-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U ovom radu formirane su dvije izvedbe čvrstofaznih referentnih elektroda (SSRE, solid-state reference electrode). Prva izvedba (RM1) temelji se na nanošenju zaštitne membrane od poli(vinil butirala) (PVB) na kemijski kloriranu srebrnu elektrodu. Za drugu izvedbu (RM2) formulirana je PVB-membrana zasićena srebrom, srebrovim kloridom te natrijevim kloridom. Membrane su prvo nanesene na disk elektrode: RM1 na srebrnu elektrodu te RM2 na elektrodu od staklastog ugljika (GC-elektroda). Po sušenju i kondicioniranju, provedeno je potenciometrijsko testiranje elektroda u nizu standardnih otopina širokog raspona koncentracija, uključujući: KCl, NaCl, CaCl2 te NaNO3. Ispitan je utjecaj pH na elektrodni odziv, za što je korišten citratni pufer širokog raspona pH vrijednosti od 2 do 12. Primjenjivost ovako pripremljenih elektroda ispitana je u postupku baždarenja komercijalne natrijeve ionsko-selektivne elektrode. Nakon što je potvrđena zahtijevana naponska stabilnost pripremljenih SSRE, proveden je transfer na inkjet ispisane Ag-elektrode na PET podlozi. RM1 i RM2 su nakapane na ispisane elektrode te su elektrokemijski ispitane jednako kao disk elektrode. Cilj je ispisivanje plošnih all-solid-state elektroda koje bi doprinijele optimizaciji i minijaturizaciji elektrokemijskih senzornih sustava.

Abstract (english)

In this work, two versions of solid-state reference electrodes (SSRE) were formed. For the first one, a protective poly(vinyl butyral) membrane (RM1) was drop-cast on a chemically chlorinated disc Ag-electrode. The second realization was made by drop-casting a PVB membrane saturated with silver, silver chloride and sodium chloride (RM2) on a disc glassy carbon electrode (GC-electrode). After drying and conditioning, potentiometric testing of the electrodes was performed in a number of standard solutions having a wide range of concentrations, including: KCl, NaCl, CaCl2 and NaNO3. The influence of pH on the electrode response was investigated, for which a citrate buffer with a wide pH range from 2 to 12 was used. After the required voltage stability of the prepared SSREs was confirmed, a transfer to inkjet printed Ag-electrodes on a PET substrate was performed. RM1 and RM2 were drop-cast on the printed electrodes. These were electrochemically tested in the same way as the disk electrodes. This work aimed to make sustainable all-solid-state horizontal electrodes that would optimize and miniaturize electronics and sensor units.

• Keywords: čvrstofazna referentna elektroda; poli(vinil-butiral) (PVB); inkjet ispis; senzori; potenciometrija
• Keywords (english): solid-state reference electrode (SSRE); polyvinyl butyral(PVB); inkjet printing; sensors; potentiometry
• Language: croatian
• URN:NBN: urn:nbn:hr:149:246214
• Project: Number: UIP-2020-02-9139; Title: Fotonsko sinteriranje inkjet ispisanih elektrokemijskih senzora i biosenzora na plastičnim podlogama; Title: Photonic sintering for inkjet printed electrochemical sensors and biosensors on plastic substrates; Acronym: PrintEChemSens; Leader: Petar Kassal; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Advanced materials and technologies; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-07-25 14:29:45