Since October 2006, PhD student at the Department of Instrumental Analysis.
Since October 2007, assistant at the Department of Instrumental Analysis.
Since 2014, assistant professor at the Department of Instrumental Analysis.
Since 2024, associate professor at the Department of Inorganic and Analytical Chemistry.
Publications:
Scientific achievements in the field of electrochemistry and electroanalytics should be classified in the discipline: chemical sciences; fields: exact and natural sciences.
Dariusz Guziejewski PhD, DSc is interested in a wide range of topics in the field of electrochemistry, which include:
Chemical electroanalysis of selected biologically active substances: This area of research focuses on the development of new voltammetric methods that can be used to detect and quantify substances. He studies various electrochemical techniques, such as square-wave amperometry, square-wave differential voltammetry or variants of analysis using the SWV technique, in order to develop sensitive and selective methods for detecting these substances.
Modeling selected electrode processes in the SWV technique and related ones: As part of this research interest, he deals with the simulation of electrode processes using numerical models, especially in the context of using the square-wave voltammetry technique. By modeling these processes, Dr. Hab. Guziejewski aims to better understand the mechanisms of electrode reactions and optimize measurement conditions to obtain the highest possible sensitivity and precision of measurements.
Study of electrode reaction kinetics: Focuses on studying the rate and mechanisms of electrode reactions, and as part of the demonstrated scientific achievement in the habilitation procedure, he presented the nature and usefulness of the effect of the amplitude of a square wave in the SWV technique and not only. This allows him to estimate the kinetics of the electrode reaction based on the above-mentioned parameter without the need to change the time frame of the experiment. In this way, analysis methods for selected reaction mechanisms were developed. Within this subject, two projects financed by the National Science Center were implemented, which enabled the modernization of the scientific equipment of the Department and contributed to the expansion of the topics of the conducted research.
Study of new electrocatalytic materials: Deals with the search for new electrocatalytic materials that can be used to increase the efficiency and selectivity of various electrode reactions, such as the determination of hydrogen peroxide, but also the oxidation of methanol, the reduction of carbon dioxide or the water splitting reaction. These studies include synthesis, characterization and testing of electrocatalyst properties, also using non-electrochemical techniques, as a result of which a patent solution for a solvothermal method of nickel-cadmium selenide synthesis was filed.
Development and characterization of new electrochemical measurement techniques: It also contributes to the development and characterization of new electrochemical measurement techniques, deals with, among others, designing and developing new measurement protocols and assessing their effectiveness and applicability. The aim is to create more advanced tools and techniques enabling more detailed study of electrode processes and their practical application, as a result of which 3 patent applications were filed.
electroanalysis of selected biologically active substances;
modeling of selected electrode processes usinge SWV technique;
study of the kinetics of electrode reactions;
design novel electrocatalytic materials;
development and characterization of novel electrochemical measurement techniques
I consider the most important research achievements to be:
1. Explanation of the phenomenon of splitting of the analytical (resulting) signal, as a result of changes in its components, caused by different values of the potential pulse amplitude in square-wave voltammetry (SWV).
2. Proposing an original method for performing electrokinetic studies for various mechanisms of electrode processes using the SWV technique, with an adjustable value of the potential pulse amplitude, based on:
a) analysis of the relative position of the SWV spectrum component signals, in the case of interpretation of standard SWV voltammograms and voltammograms in which the potential was corrected (potential compensation to the value corresponding to the current sampling moment);
b) introduction of a new term to voltammetry, "quasi-reversible maximum based on amplitude", which is justified by the interpretation of SWV electrochemical spectra. 3. Proposing, developing and introducing an innovative series of research techniques into voltammetry, based on electrochemical Faradaic spectroscopy and its variants: multi-frequency, multi-amplitude and multi-amplitude-frequency. 4. Proposing for analytical purposes the principle of extending the range of pulse amplitude values in the SWV square wave technique based on the above-mentioned potential correction.
CYCLICAL DUTYMONDAY
12:00 - 14:00
Pomorska 163/165 room: budynek D, Pomorska 163, p.7 lub p. 2 90-236 Łódź
phone: 42-635-54-80
e-mail: dariusz.guziejewski@chemia.uni.lodz.pl
e-mail: katarzyna.gryciuk@chemia.uni.lodz.pl
Pomorska 163/165
90-236 Łódź
Tamka 12
91-403 Łódź
Pomorska 163/165 room: budynek D, Pomorska 163, p.7 lub p. 2 90-236 Łódź