Kaja Spilarewicz-Stanek

Kaja Spilarewicz-Stanek
Jagiellonian University | UJ · Department of Inorganic Chemistry

PhD

About

10
Publications
661
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85
Citations

Publications

Publications (10)
Article
Full-text available
The analytical performance of the clay paste electrode and graphene paste electrode was compared using square wave voltammetry (SWV) and cyclic voltammetry (CV). The comparison was made on the basis of a paracetamol (PA) determination on both working electrodes. The influence of pH and SWV parameters was investigated. The linear concentration range...
Article
Full-text available
This paper discusses the electrochemical behavior of antiviral drug Tenofovir (TFV) and its possible applicability towards electroanalytical determination with diverse detection strategies using square-wave voltammetry. Namely, oxidation processes were investigated using glassy carbon electrode with graphene oxide surface modification (GO/GCE), whi...
Article
Full-text available
Graphene oxide or reduced graphene oxide-TiO2 (TGO or TRGO) nanocomposites were decorated with Ag nanoparticles (AgNPs) using the photoreduction method. The photocatalytic growth of AgNPs on TGO and TRGO nanocomposites was compared, while keeping the other parameters (i.e., thickness, chemical composition, crystalline structure and the percentage o...
Article
Full-text available
This work is focused on photocatalytic properties of titanium dioxide thin coatings modified with silver nanostructures (AgNSs) and graphene oxide (GO) sheets which were analyzed in processes of chemical transformations of rhodamine B (RhB) under ultraviolet (UV) or visible light (Vis) irradiation, respectively. UV-Vis spectroscopy was applied to a...
Article
In present work, the stability and photochemical transformations of graphene oxide (GO) under UV irradiation in water dispersion, and during photocatalytic processes, in the system containing TiO2 thin films, were examined. Under UV light, the appearance of defects in GO flakes structure was observed, and the intensification of flakes deterioration...
Article
The photocatalytic process of arachidic acid decomposition on titanium dioxide in the form of polycrystalline anatase and on titanium dioxide modified by silver nanoparticles (AgNPs/TiO2) was observed using atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FT-IR). Arachidic acid (AA) was chosen as a model pollutant because...
Article
Highly ordered two-dimensional porous TiO2 coatings (HOP) were obtained using the sol–gel method and polystyrene (PS) template arranged by self-assembly. The size of the obtained pores was 302 nm, which is less than the size of the PS beads used as a template (320 nm), due to material shrinkage during calcination. Non-ordered porous (NOP) and non-p...
Article
Silver nanoparticles (AgNPs) were grown on the surface of titanium dioxide coating (TiO2) using a photochemical method. The size and number of AgNPs were monitored using scanning electron microscopy (SEM) after 20, 30, 180 and 300 seconds of UV illumination. It was found that for short illumination times (20 s) a significant number of small nanopar...
Article
The goal of the presented investigation was to study the differences in the decoration of graphene sheets, having various amounts of oxygen containing functional groups, with silver nanoparticles (AgNPs). The reduction of graphehe oxide (GO) was performed with the use of ascorbic acid (AA), leading to partially-reduced graphene oxide (PRGO) and red...

Questions

Question (1)
Question
I' d like to measure the area of flat graphene flakes deposited on the flat  surface of substrate.
Please suggest to me a free computer program, which I can use to measure the area of unregular flat shapes defined in nm2 from SEM images.
If you have any other propositions, please let me know how can I solve that research problem.

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Projects

Project (1)
Project
Describing the effect of the titanium dioxide coatings modification by silver nanoparticles and graphene (with various architectures of nanocomposites) on enhancing the photocatalytic activity in the field of degradation of organic compounds. Project supported by National Science Centre, Poland, project number: 2016/21/N/ST8/01159