Katarzyna Siwińska‐Stefańska

Poznań University of Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Teofil Jesionowski

Poznań University of Technology

112

Adam Kubiak

Adam Mickiewicz University in Poznań

Adam Piasecki

Poznań University of Technology

Filip Ciesielczyk

Poznań University of Technology

ŁK

Łukasz Kłapiszewski

Poznań University of Technology

Andrzej Krysztafkiewicz

Poznań University of Technology

Anna Zielińska‐Jurek

Gdańsk University of Technology

Jakub Zdarta

Poznań University of Technology

Elżbieta Gabała

Institute of Plant Protection

Beata Kurc

Poznań University of Technology

Cooperative Institutions

Poznań University of Technology

102

Adam Mickiewicz University in Poznań

Institute of Chemical Technology

Gdańsk University of Technology

University of Life Sciences in Poznań

Faculty (United Kingdom)

AGH University of Krakow

TU Bergakademie Freiberg

Łukasiewicz Research Network - Textile Research Institute

Wrocław University of Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

The performance of multicomponent oxide systems based on TiO2, ZrO2 and SiO2 in the photocatalytic degradation of Rhodamine B: Mechanism and kinetic studies

Colloids and Surfaces A Physicochemical and Engineering Aspects (2019)

Katarzyna Siwińska‐Stefańska Dariusz Świgoń Piotr Rychtowski Dariusz Moszyński Agnieszka Zgoła‐Grześkowiak

Rhodamine B

10.1016/j.colsurfa.2019.124272

Cite

Citations (57)

Polymer adsorption on the surface of highly dispersed silica

Applied Surface Science (2007)

Katarzyna Siwińska‐Stefańska Jędrzej Walkowiak Andrzej Krysztafkiewicz Teofil Jesionowski

Ammonium bromide

Surface Modification

10.1016/j.apsusc.2007.11.046

Cite

Citations (8)

Solvothermal growth of {0 0 1} exposed anatase nanosheets and their ability to mineralize organic pollutants. The effect of alcohol type and content on the nucleation and growth of TiO2 nanostructures

Applied Surface Science (2021)

Szymon Dudziak Marta Kowalkińska Jakub Karczewski Marcin Pisarek Katarzyna Siuzdak

Herein, the series of {0 0 1} exposed anatase nanosheets from HF-assisted solvothermal growth synthesis were obtained. The two-dimensional TiO2 were characterized, including both bulk (XRD, DR-UV–Vis, Mott-Schottky) and surface characteristics (N2 sorption, XPS, SEM) with experimental results compiled with Density Functional Theory (DFT) calculations. The effect of alcohol amount and type was studied, demonstrating the crucial role of nucleation rate on the final material properties, which was connected with the possible ligand exchange between F− and ROH in the [TiF6]2− octahedra, leading to further TiO2 condensation through an ether elimination reaction. Highly active 2D nanoparticles were easily obtained for different reaction times when a moderate amount of n-butanol or n-hexanol was introduced to the synthesis. The photoactivity of 2D TiO2 with exposed {0 0 1} facet strongly depended on the photocatalytic available surface area with an increased amount of ortho–hydroxyphenol (catechol) formed as a by-product. Meanwhile, the rise of n-butanol or n-hexanol content during solvothermal reaction or changing it to ethanol allowed to form smaller and more crystalline anatase particles, but their activity was hindered. For these samples, the slow phenol disappearance and no catechol formation occurred due to (i) a lower amount of adsorbed fluorine, (ii) band position shifting towards lower values, and (iii) the surface presence of Ti3+, which prevented the generation of OH radicals. It was also found that changing the nucleation rate by modifying the reaction environment influences the fluorine ions distribution, determining the final properties of 2D structure photocatalyst.

10.1016/j.apsusc.2021.150360

Cite

Citations (31)

Synthesis of Selected Mixed Oxide Materials with Tailored Photocatalytic Activity in the Degradation of Tetracycline

Materials (2021)

Katarzyna Siwińska‐Stefańska Angelika Andrzejczak Dominik Paukszta Adam Piasecki Dariusz Moszyński

The elimination of antibiotics occurring in the natural environment has become a great challenge in recent years. Among other techniques, the photocatalytic degradation of this type of pollutant seems to be a promising approach. Thus, the search for new photoactive materials is currently of great importance. The present study concerns the sol–gel synthesis of mono, binary and ternary TiO2-based materials, which are used as active photocatalysts. The main goal was to evaluate how the addition of selected components—zirconium dioxide (ZrO2) and/or zinc oxide (ZnO)—during the synthesis of TiO2-based materials and the temperature of thermal treatment affect the materials’ physicochemical and photocatalytic properties. The fabricated mixed oxide materials underwent detailed physicochemical analysis, utilizing scanning-electron microscopy (SEM), X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), energy-dispersive X-ray spectroscopy (EDS), low-temperature N2 sorption (BET model), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The synthesized mixed oxide materials were used as photocatalysts in the heterogeneous photodegradation of tetracycline (TC). The physicochemical properties of the fabricated photocatalysts, including morphology, crystalline and textural structure, as well as the pH of the reaction system in the photocatalytic tests, were taken into account in determining their photo-oxidation activity. LC–MS/MS analysis was used to identify the possible degradation products of the selected antibiotic.

Photodegradation

10.3390/ma14185361

Cite

Citations (11)

Synthesis of active in visible light TiO2-ZnO photocatalysts for degradation of selected organic impurities

Adam Kubiak Katarzyna Siwińska‐Stefańska Teofil Jesionowski

Degradation

Visible spectrum

Source

Cite

Citations (0)

Bismuth-titanium-silicon-based ternary oxide system: A comprehensive analysis and electrochemical utility

Solid State Ionics (2018)

Beata Kurc Katarzyna Siwińska‐Stefańska Teofil Jesionowski

Bismuth

Dimethyl carbonate

10.1016/j.ssi.2018.06.013

Cite

Citations (8)

Evaluation of the physico-chemical properties of hydrocarbons-exposed bacterial biomass

Colloids and Surfaces B Biointerfaces (2020)

Wojciech Smułek Agata Zdarta Adam Grzywaczyk Urszula Guzik Katarzyna Siwińska‐Stefańska

Pseudomonas fluorescens

Human decontamination

10.1016/j.colsurfb.2020.111310

Cite

Citations (5)

Effect of microplastic on sorption, toxicity, and mineralization of 2,4-dichlorophenoxyacetic acid ionic liquids

Applied Microbiology and Biotechnology (2024)

Natalia Lisiecka Marta Woźniak-Karczewska Anna Parus Maria Simpson Robert Frankowski

Abstract Recently, there has been significant focus on microplastics in the environment, especially regarding their role in sorption–desorption processes of emerging contaminants, impacting pollutant migration between aquatic and terrestrial ecosystems. Notably, the newest pollutants in such environments are the herbicide formulations known as ionic liquids (ILs), which integrate the structure of classic herbicidal anion with surface-active cations acting as an adjuvant. In our study, we synthesized herbicidal ILs by combining 2,4-D anion with cetyltrimethylammonium [CTA] and didecyldimethylammonium [DDA] cations. We investigated whether ILs and the mixture of salts, when exposed to polyethylene (PE) microplastics, differ in properties. We analyzed their sorption on defined PE particles, evaluated toxicity on Pseudomonas putida KT2440 using trans/cis ratio of unsaturated fatty acids, and assessed biodegradability with OECD 301F standard test. Results indicate IL cations and anions behave as distinct entities, questioning IL synthesis feasibility. Hydrophobic adjuvants were found to adsorb onto PE microplastic surfaces (5–60% [CTA] > [DDA]), posing potential threats of surface-active xenobiotic accumulation. This highlights the need to explore microplastics’ role as sorbents of hazardous adjuvants in agriculture, potentially competing with humic acids and affecting xenobiotic bioavailability. Consequently, xenobiotics may persist longer in the environment, facilitated by microplastic mobility between aquatic and terrestrial ecosystems. Key points • Microplastics act as sorbents, accumulating xenobiotics and limiting biodegradation. • Sorption of surfactant cations on microplastics reduces soil bacteria toxicity. • Research confirms independent action of ions from ionic liquids in the environment. Graphical abstract

Xenobiotic

10.1007/s00253-024-13353-6

Cite

Citations (0)

New Insights into the Application of Biocompatible (Un)Modified TiO2 and TiO2-ZrO2 Oxide Fillers in Light-Curing Materials

Materials (2024)

Katarzyna Siwińska‐Stefańska Angelika Andrzejczak Teofil Jesionowski Łukasz Gierz Agnieszka Marcinkowska

A novel UV-light-curable poly(ethylene glycol) diacrylate matrix composite material with unmodified and methacryloxyl-grafted TiO2 and TiO2-ZrO2 systems was developed and tested as a potential coating material for medical components. The main goal of the research was to evaluate how the addition of (un)modified inorganic oxide fillers affects the properties of the composition (viscosity, UV/Vis spectra), the kinetics of photocuring (photo-DSC), and the morphological (SEM), physicochemical, and thermal properties (DSC, TGA) of the resulting composites. The applied filler functionalization process decreased their polarity and changed their size, BET surface area, and pore volume, which influenced the viscosity and kinetics of the photocurable system. In addition, the addition of synthesized fillers reduced the polymer’s glass transition temperature and increased its thermal stability. It was also observed that additional UV irradiation of the tested composite changed its surface, resulting in hydrophobic properties (with the addition of 7 wt.% filler, an increase in the contact angle by more than 45% was observed).

Thermal Stability

Surface Modification

Filler (materials)

UV-Curing

10.3390/ma17122908

Cite

Citations (0)

Modification of structured bio‑carbon derived from spongin-based scaffolds with nickel compounds to produce a functional catalyst for reduction and oxidation reactions: Potential for use in environmental protection

The Science of The Total Environment (2021)

Sonia Żółtowska‐Aksamitowska Zuzanna Bielan Joanna Zembrzuska Katarzyna Siwińska‐Stefańska Adam Piasecki

Three different 3D fibrous-like NiO/Ni(OH)2/Ni‑carbonized spongin-based materials were prepared via a simple sorption–reduction method. Depending on the support used, the catalysts were composed of carbon, nickel oxide, nickel hydroxide and zero-valent nickel, with the surface content of the nickel-containing phase in the range 15.2–26.0 wt%. Catalytic studies showed promising activity in the oxidation of phenolic compounds in water and in the reduction of 4-nitrophenol. The oxidation efficiency depends on the substrate used and ranges from 80% for phenol at pH 2 to 99% for 4-chlorophenoxyacetic acid (4-CPA) and methylchlorophenoxypropionic acid (MCPP). In the reduction reaction, all catalysts exhibited superior activity, with rate constants in the range 0.648–1.022 min-1. The work also includes a detailed investigation of reusability and kinetic studies.

Nickel oxide

Carbon fibers

10.1016/j.scitotenv.2021.148692

Cite

Citations (11)