Sinteza in uporaba nanostrukturiranega iridija za elektrokemijsko detekcijo perokso zvrsti

magistrsko delo

Vasja Valetič (Author), Vasko Jovanovski (Mentor), Helena Prosen (Thesis defence commission member), Bojan Kozlevčar (Thesis defence commission member), Urška Lavrenčič Štangar (Co-mentor)

Abstract

Cilj dela je bil razvoj elektrokemijskega plinskega senzorja za detekcijo perokso zvrsti s pomočjo tiskanih elektrodnih sistemov. Modifikacijo delovne elektrode sem izvedel z nanosom nanostrukturiranih senzorskih materialov, najpogosteje iz vodnih suspenzij. Uporabil sem različne gelske elektrolite na osnovi poliakrilne kisline, ki niso služili le kot elektrolit, ampak tudi kot sredstvo za predkoncentracijo in stabilizacijo vodikovega peroksida in nato triaceton triperoksid (TATP) eksploziva. Za karakterizacijo senzorja za detekcijo vodikovega peroksida v plinski fazi sem uporabil ciklično voltametrijo, za samo detekcijo pa pulzno amperometrijo. Optimiziral sem ključne detekcijske parametre, kot so koncentracija katalitskega materiala, pH elektrolita, čas akumulacije, potencial itd. Nato sem sintetiziral modelni organski perokso eksploziv TATP, in ga uspešno določal v plinski fazi s prej omenjenim senzorjem. Za validacijo metode sem uporabil standardno analizno metodo na osnovi plinske kromatografije, sklopljene z masno spektrometrijo (GC-MS).

Keywords

elektrokemijski plinski senzorji;elektrokemijske analizne metode;vodikov peroksid;perokso eksplozivi;iridij;gelski elektrolit;magistrska dela;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[V. Valetič]
UDC:	543.55:546.93(043.2)
COBISS:	89750787
Views:	197
Downloads:	27
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Synthesis and use of nanostructured iridium for electrochemical detection of peroxo species
Secondary abstract:	The goal of the present thesis was the development of electrochemical gas sensor for the detection of peroxo species with the help of printed electrode systems. Modification of the working electrode was made by coating the surface with nanostructured sensor materials, mostly from water suspensions. Gel electrolytes based on polyacrylic acid were used, which besides working as electrolytes acted as mediums for the stabilization and preconcentration of hydrogen peroxide and later triacetone triperoxide (TATP) explosive. Cyclic voltammetry was used for the characterisation of the sensor for the detection of hydrogen peroxide in gaseous phase, while pulse amperometry was used for its detection. Key detection parameters were optimised like the concentration of catalytic material, pH of the electrolyte, time of accumulation, potential etc. Then a model organic peroxo explosive TATP was synthesised and successfully detected in gaseous phase by the same sensor. For validation of the method a standard analytical method on the basis of gas chromatography coupled with mass spectrometry (GC-MS) was used.
Secondary keywords:	electrochemical gas sensors;hydrogen peroxide;peroxo explosives;iridium;gel electrolyte;
Type (COBISS):	Master's thesis/paper
Study programme:	1000375
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemija
Pages:	62 str.
ID:	14067378