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Komenda A, Wojnicki M, Kharytonau D, Mordarski G, Csapó E, Socha RP. Deposition of Thin Electroconductive Layers of Tin (II) Sulfide on the Copper Surface Using the Hydrometallurgical Method: Electrical and Optical Studies. Materials (Basel) 2023; 16:5019. [PMID: 37512293 PMCID: PMC10385535 DOI: 10.3390/ma16145019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/12/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023]
Abstract
Thin films of tin (II) sulfide (SnS) were deposited onto a 500 µm thick copper substrate by a chemical bath method. The effect of sodium (Na) doping in these films was studied. The synthesis of the films was performed at temperatures of 60, 70, and 80 °C for 5 min. The microstructure of the SnS films analyzed by scanning electron microscopy (SEM) showed a compact morphology of the films deposited at 80 °C. The edges of the SnS grains were rounded off with the addition of a commercial surfactant. The thickness of different SnS layers deposited on the copper substrate was found to be 230 nm from spectroscopic ellipsometry and cross-section analysis using SEM. The deposition parameters such as temperature, surfactant addition, and sodium doping time did not affect the thickness of the layers. From the X-ray diffraction (XRD) analysis, the size of the SnS crystallites was found to be around 44 nm. Depending on the process conditions, Na doping affects the size of the crystallites in different ways. A study of the conductivity of SnS films provides a specific conductivity value of 0.3 S. The energy dispersive analysis of X-rays (EDAX) equipped with the SEM revealed the Sn:S stoichiometry of the film to be 1:1, which was confirmed by the X-ray photoelectron spectroscopy (XPS) analysis. The determined band-gap of SnS is equal to 1.27 eV and is in good agreement with the literature data.
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Affiliation(s)
- Anna Komenda
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
- CBRTP SA Research and Development Center of Technology for Industry, Ludwika Waryńskiego 3A, 00-645 Warszawa, Poland
| | - Marek Wojnicki
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
| | - Dzmitry Kharytonau
- CBRTP SA Research and Development Center of Technology for Industry, Ludwika Waryńskiego 3A, 00-645 Warszawa, Poland
- Soft Matter Nanostructures Group, Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Grzegorz Mordarski
- CBRTP SA Research and Development Center of Technology for Industry, Ludwika Waryńskiego 3A, 00-645 Warszawa, Poland
| | - Edit Csapó
- MTA-SZTE "Lendület" Momentum Noble Metal Nanostructures Research Group, University of Szeged, Rerrich B. Sqr. 1, H-6720 Szeged, Hungary
| | - Robert P Socha
- CBRTP SA Research and Development Center of Technology for Industry, Ludwika Waryńskiego 3A, 00-645 Warszawa, Poland
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Klyndyuk AI, Kharytonau DS, Mosiałek M, Chizhova EA, Komenda A, Socha RP, Zimowska M. Double substituted NdBa(Fe,Co,Cu)2O5+δ layered perovskites as cathode materials for intermediate-temperature solid oxide fuel cells – correlation between structure and electrochemical properties. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Pawlik A, Jarosz M, Socha RP, Sulka GD. The Impacts of Crystalline Structure and Different Surface Functional Groups on Drug Release and the Osseointegration Process of Nanostructured TiO 2. Molecules 2021; 26:1723. [PMID: 33808785 PMCID: PMC8003584 DOI: 10.3390/molecules26061723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/10/2021] [Accepted: 03/15/2021] [Indexed: 11/17/2022] Open
Abstract
In implantable materials, surface topography and chemistry are the most important in the effective osseointegration and interaction with drug molecules. Therefore, structural and surface modifications of nanostructured titanium dioxide (TiO2) layers are reported in the present work. In particular, the modification of annealed TiO2 samples with -OH groups and silane derivatives, confirmed by X-ray photoelectron spectroscopy, is shown. Moreover, the ibuprofen release process was studied regarding the desorption-desorption-diffusion (DDD) kinetic model. The results proved that the most significant impact on the release profile is annealing, and further surface modifications did not change its kinetics. Additionally, the cell adhesion and proliferation were examined based on the MTS test and immunofluorescent staining. The obtained data showed that the proposed changes in the surface chemistry enhance the samples' hydrophilicity. Moreover, improvements in the adhesion and proliferation of the MG-63 cells were observed.
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Affiliation(s)
- Anna Pawlik
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30387 Krakow, Poland; (A.P.); (G.D.S.)
| | - Magdalena Jarosz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30387 Krakow, Poland; (A.P.); (G.D.S.)
| | - Robert P. Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Science, Niezapominajek 8, 30239 Krakow, Poland;
| | - Grzegorz D. Sulka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30387 Krakow, Poland; (A.P.); (G.D.S.)
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4
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Wojnicki M, Luty-Błocho M, Kwolek P, Gajewska M, Socha RP, Pędzich Z, Csapó E, Hessel V. The influence of dielectric permittivity of water on the shape of PtNPs synthesized in high-pressure high-temperature microwave reactor. Sci Rep 2021; 11:4851. [PMID: 33649494 PMCID: PMC7921409 DOI: 10.1038/s41598-021-84388-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 02/01/2021] [Indexed: 11/08/2022] Open
Abstract
In this paper, a novel method for the synthesis of Pt nanoparticles (PtNPs) using a microwave autoclave reactor is proposed. For benchmarking, the obtained results are compared with the traditional, batch method. A novel process window is proposed, which is the application of high-temperature and high-pressure. The main finding is that this only brings advantage, when the ionic strength of the system is enough low. It is explained, that at high pressure and high temperature, water behaves like only a slightly polar solvent, approaching a subcritical state. This reduces the electrostatic stabilization of the particles. Moreover, a change in the Pt particle shape is observed under high pressure and temperature conditions, suggesting that additional physical-chemical processes are involved.
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Affiliation(s)
- Marek Wojnicki
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059, Kraków, Poland.
| | - Magdalena Luty-Błocho
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza Ave. 30, 30-059, Kraków, Poland
| | - Przemysław Kwolek
- Department of Materials Science, Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Aleja Powstańców Warszawy 12, 35-959, Rzeszow, Poland
| | - Marta Gajewska
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Kraków, Poland
| | - Robert P Socha
- Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239, Kraków, Poland
| | - Zbigniew Pędzich
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Kraków, Poland
| | - Edit Csapó
- MTA-SZTE Biomimetic Systems Research Group, University of Szeged, Dóm tér 8, 6720, Szeged, Hungary
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich B. tér 1, 6720, Szeged, Hungary
| | - Volker Hessel
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, Australia
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Chilimoniuk P, Socha RP, Czujko T. Nanoporous Anodic Aluminum-Iron Oxide with a Tunable Band Gap Formed on the FeAl 3 Intermetallic Phase. Materials (Basel) 2020; 13:ma13163471. [PMID: 32781714 PMCID: PMC7475830 DOI: 10.3390/ma13163471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/24/2020] [Accepted: 08/03/2020] [Indexed: 11/16/2022]
Abstract
Nanostructured anodic oxide layers on an FeAl3 intermetallic alloy was prepared by two-step anodization in 20 wt.% H2SO4 at 0 °C. The obtained anodic oxide coating was subjected to phase and chemical composition analysis using XPS and XRD techniques. An analysis of the band gap of individual coatings was also performed. The applied parameters of the anodization process were determined, enabling the formation of a nanostructured coating on the FeAl3 intermetallic alloy. Tests were carried out on samples produced at a voltage between 10 V and 22.5 V in 2.5 V steps. The produced coatings were subjected to an annealing process at 900 °C for 2 h in an argon protective atmosphere. Moreover, the influence of the substrate chemical composition on the chemical and phase composition of the anodic oxide are discussed. Band gaps of 2.37 eV at 22.5 V and 2.64 eV at 10 V were obtained directly after the anodizing process. After applying the heat treatment, band gap values of 2.10 eV at 22.5 Vand 2.48 eV for the coating produced at 10 V were obtained.
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Affiliation(s)
- Paulina Chilimoniuk
- Institute of Materials Science and Engineering, Faculty of Advanced Technology and Chemistry, Military University of Technology, Kaliskiego 2 Street, 00-908 Warszawa, Poland
- Correspondence: (P.C.); (T.C.); Tel.: +48-261-839-445 (P.C. & T.C.)
| | - Robert P. Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland;
| | - Tomasz Czujko
- Institute of Materials Science and Engineering, Faculty of Advanced Technology and Chemistry, Military University of Technology, Kaliskiego 2 Street, 00-908 Warszawa, Poland
- Correspondence: (P.C.); (T.C.); Tel.: +48-261-839-445 (P.C. & T.C.)
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6
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Napruszewska BD, Michalik-Zym A, Dula R, Duraczyńska D, Rojek W, Socha RP, Lityńska-Dobrzyńska L, Bahranowski K, Serwicka EM. VOCs combustion catalysts based on composites of exfoliated organo-Laponite and multimetallic (Mn, Al, Zr, Ce) hydrotalcites prepared by inverse microemulsion. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.03.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Michalska J, Sowa M, Piotrowska M, Widziołek M, Tylko G, Dercz G, Socha RP, Osyczka AM, Simka W. Incorporation of Ca ions into anodic oxide coatings on the Ti-13Nb-13Zr alloy by plasma electrolytic oxidation. Mater Sci Eng C Mater Biol Appl 2019; 104:109957. [PMID: 31500028 DOI: 10.1016/j.msec.2019.109957] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/05/2019] [Accepted: 07/05/2019] [Indexed: 01/04/2023]
Abstract
The present work concerns the surface modification of The Ti-13Nb-13Zr alloy by electropolishing and plasma electrolytic oxidation (PEO) process in Ca-containing electrolytes: calcium formate and calcium lactate solutions (0.1-1.0 mol dm-3) under voltages of 200 and 400 V. As a result of the PEO process, a porous oxide layer containing incorporated calcium compounds was formed on the Ti-13Nb-13Zr alloy surface. The morphology and chemical composition of the modified Ti-13Nb-13Zr alloy were investigated using scanning electron microscopy (SEM + EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). An increase in the applied voltage caused an increase in the number of pores and an increase in the amount of calcium incorporated in the oxide layer. Analysis showed that all samples were covered by titanium oxide, which was present in the form of anatase and/or rutile. In course of the experiments, it was showed that the proposed procedure has a positive effect on the overall bioactivity of the Ti-13Nb-13Zr alloy. Bioactivity investigations using simulated body fluid (SBF) confirmed the formation of apatite on the anodized surfaces. The cell adhesion results obtained by the use of human bone marrow mesenchymal stem cells (hBMSC) demonstrated that the PEO coatings on the Ti-13Nb-13Zr alloy remarkably enhanced the cytocompatibility of the substrate, indicating a potential application in orthopedic surgeries. The incorporation of Ca into the oxide layer proceeded to a higher extent when the PEO treatment was performed in the calcium lactate bath. The oxide layers formed in the calcium lactate solution exhibited also superior biological behavior towards hBMSC. This can be ascribed to the presence of carboxylic groups onto coatings' surface (as identified by XPS), which facilitated the anchoring of cells and tissues.
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Affiliation(s)
- Joanna Michalska
- Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland.
| | - Maciej Sowa
- Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland
| | - Magdalena Piotrowska
- Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland
| | - Magdalena Widziołek
- Faculty of Biology and Earth Sciences, Jagiellonian University, Gronostajowa Street 9, 30-060 Kraków, Poland
| | - Grzegorz Tylko
- Faculty of Biology and Earth Sciences, Jagiellonian University, Gronostajowa Street 9, 30-060 Kraków, Poland
| | - Grzegorz Dercz
- Institute of Materials Science, University of Silesia, 75 Pułku Piechoty Street 1a, 41-500 Chorzów, Poland
| | - Robert P Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Niezapominajek 8 Street, 30-239 Krakow, Poland
| | - Anna M Osyczka
- Faculty of Biology and Earth Sciences, Jagiellonian University, Gronostajowa Street 9, 30-060 Kraków, Poland
| | - W Simka
- Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland; Osteoplant Research and Development, Metalowców 25, 39-200 Dębica, Poland
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Tuchowska M, Muir B, Kowalik M, Socha RP, Bajda T. Sorption of Molybdates and Tungstates on Functionalized Montmorillonites: Structural and Textural Features. Materials (Basel) 2019; 12:ma12142253. [PMID: 31337006 PMCID: PMC6678948 DOI: 10.3390/ma12142253] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/05/2019] [Accepted: 07/10/2019] [Indexed: 12/02/2022]
Abstract
Montmorillonite—the most popular mineral of the smectite group—has been recognized as a low-cost, easily available mineral sorbent of heavy metals and other organic and inorganic compounds that pollute water. The aim of this work was to determine the sorption mechanism and to identify the reaction products formed on the surface of montmorillonite and organo-montmorillonite after sorption of molybdates (Mo(VI)) and tungstates (W(VI)). Montmorillonites are often modified to generate a negative charge on the surface. The main objective of the study was to investigate and compare the features of Na-montmorillonite (Na-M), montmorillonite modified with dodecyl trimethyl ammonium bromide (DDTMA-M), and montmorillonite modified with didodecyl dimethyl ammonium bromide (DDDDMA-M) before and after sorption experiments. The material obtained after sorption was studied by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The XRD pattern showed the presence of a new crystallic phase in the sample that was observed under an SEM as an accumulation of crystals. The FTIR spectra showed bands related to Mo–O and W–O vibration (840 and 940 cm−1, respectively). The obtained results suggest that molybdenum(VI) and tungsten(VI) ions sorb onto the organo-montmorillonite in the form of alkylammonium molybdates and tungstates.
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Affiliation(s)
- Magdalena Tuchowska
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.
| | - Barbara Muir
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Mariola Kowalik
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Robert P Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Tomasz Bajda
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
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Mika K, Socha RP, Nyga P, Wiercigroch E, Małek K, Jarosz M, Uchacz T, Sulka GD, Zaraska L. Electrochemical synthesis and characterization of dark nanoporous zinc oxide films. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pawlik A, Socha RP, Hubalek Kalbacova M, Sulka GD. Surface modification of nanoporous anodic titanium dioxide layers for drug delivery systems and enhanced SAOS-2 cell response. Colloids Surf B Biointerfaces 2018; 171:58-66. [PMID: 30007219 DOI: 10.1016/j.colsurfb.2018.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/13/2018] [Accepted: 07/05/2018] [Indexed: 01/13/2023]
Abstract
Nowadays, titanium and its alloys are the most commonly used implantable materials. The surface topography and chemistry of titanium-based implants are responsible for osseointegration. One of the methods to improve biocompatibility of Ti implants is a modification with sodium hydroxide (NaOH) or 3-aminopropyltriethoxysilane (APTES). In the present study, anodic titanium dioxide (ATO) layers were electrochemically fabricated, and then immersed in a NaOH solution or in NaOH and APTES solutions. The functionalized samples were characterized by using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). All samples were examined as drug delivery systems and scaffolds for cell culturing. Based on the parameters of the fitted desorption-desorption-diffusion (DDD) model parameters, it was concluded that the modification with NaOH increased the amount of released ibuprofen and inhibited the release process. Osteoblast-like cell line (SAOS-2) was used to investigate the cell response on the non-modified and modified ATO samples. The MTS test and immunofluorescent staining were carried out to examine cell adhesion and proliferation. The data showed that the modification of nanoporous TiO2 layers with small molecules such as APTES enhanced metabolic activity of adhered cells compared with the non-modified and NaOH-modified TiO2 layers. In addition, the cells had a polygonal-like morphology with distinct projecting actin filaments and were well dispersed over the whole analyzed surface.
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Affiliation(s)
- Anna Pawlik
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry Jagiellonian University in Krakow, Gronostajowa 2, 30387 Krakow, Poland
| | - Robert P Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30239 Krakow, Poland
| | - Marie Hubalek Kalbacova
- Institute of Pathological Physiology, 1st Faculty of Medicine, Charles University, U nemocnice 5, 128 53 Prague, Czech Republic.
| | - Grzegorz D Sulka
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry Jagiellonian University in Krakow, Gronostajowa 2, 30387 Krakow, Poland.
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Zaraska L, Gawlak K, Gurgul M, Chlebda DK, Socha RP, Sulka GD. Controlled synthesis of nanoporous tin oxide layers with various pore diameters and their photoelectrochemical properties. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.113] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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12
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Michalska J, Sowa M, Socha RP, Simka W, Cwalina B. The influence of Desulfovibrio desulfuricans bacteria on a Ni-Ti alloy: electrochemical behavior and surface analysis. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Wojnicki M, Socha RP, Luty-Błocho M, Fitzner K. Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon. Reac Kinet Mech Cat 2017. [DOI: 10.1007/s11144-017-1151-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Lalik E, Mordarski G, Socha RP, Drelinkiewicz A. Chaotic variations of electrical conductance in powdered Pd correlating with oscillatory sorption of D 2. Phys Chem Chem Phys 2017; 19:7040-7053. [PMID: 28224158 DOI: 10.1039/c6cp08274b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A microcalorimetric method has been combined with a potentiostatic method to measure simultaneously the rate of heat evolution and the electrical current in a powdered sample of palladium during thermokinetic oscillations accompanying the sorption of deuterium in the metal. Deterministic chaos has been confirmed in the temporal variations in current (of ca. 1-4 mA) on the onset of both the sorption and the desorption of deuterium from Pd. It has been found that the first derivative of the current in time, dI/dt, turns out to be correlated precisely with the periodicity of thermokinetic oscillations. The dI/dt curves consist of regularly timed outbursts of aperiodic, high frequency (HF) fluctuations, interlinked by calm periods. The calm periods correlate with the descending slopes of thermokinetic oscillations (i.e., with decrease in the rate of heat evolution) and their lengths depend on the frequency of thermokinetic oscillations. In turn, the outbursts of aperiodic HF fluctuations in the dI/dt derivatives correlate with the ascending slopes of thermokinetic oscillations (i.e., with increasing rate of heat production), but their length is practically constant, irrespective of the thermokinetic frequency. We propose a periodic mechanism of sorption including a collective action of adsorbed deuterium taking place on the Pd surface. The periodicity of this mechanism arises from the temporal separation of its two sub-processes. The sub-process (1) involves only the adsorption of molecular D2 on the Pd surface and proceeds with little heat evolution until a critical coverage of D2 is achieved. The sub-process (2) initiates the dissociation of the adsorbed D2 and the penetration of the dissociated atomic D species into the Pd lattice. It is the more energetic of the two, but it only begins after a threshold coverage of D2 on the Pd surface has been achieved. We suggest that these sub-processes occurring alternatingly may provide a kernel for the oscillatory behavior observed in Pd/H(D) systems.
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Affiliation(s)
- E Lalik
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL 30239 Krakow, Poland.
| | - G Mordarski
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL 30239 Krakow, Poland.
| | - R P Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL 30239 Krakow, Poland.
| | - A Drelinkiewicz
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL 30239 Krakow, Poland.
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Abstract
Kinetic studies on the recovery of platinum(iv) chloride complex ions from acidic solutions using commercially available activated carbon (AC) were carried out using spectrophotometric methods. The overall process obeyed first-order reaction model. The overall process is complex and consists of two steps: the first one is related to the reversible adsorption–desorption of PtIV complex and the second one is related to the reduction of PtIV complex on the AC surface. The first step of the overall process was limited by diffusion, whereas the second step ran under kinetic control. The activation energies of the individual reactions in both steps were determined and corresponded to 18.27, 7.85, and 31.2 kJ mol–1 for the adsorption, desorption, and reduction reactions, respectively. X-ray photoelectron spectroscopy results confirmed that the chemical reaction was related to the reduction of PtIV to PtII on the AC surface. The results show that the investigated AC can be applied for platinum recovery from highly diluted aqueous systems.
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Dec W, Mosiałek M, Socha RP, Jaworska-Kik M, Simka W, Michalska J. The effect of sulphate-reducing bacteria biofilm on passivity and development of pitting on 2205 duplex stainless steel. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Pacuła A, Uosaki K, Socha RP, Bielańska E, Pietrzyk P, Zimowska M. Nitrogen-doped carbon materials derived from acetonitrile and Mg-Co-Al layered double hydroxides as electrocatalysts for oxygen reduction reaction. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.150] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Manjakkal L, Cvejin K, Kulawik J, Zaraska K, Socha RP, Szwagierczak D. X-ray photoelectron spectroscopic and electrochemical impedance spectroscopic analysis of RuO2-Ta2O5 thick film pH sensors. Anal Chim Acta 2016; 931:47-56. [DOI: 10.1016/j.aca.2016.05.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 04/12/2016] [Accepted: 05/11/2016] [Indexed: 11/25/2022]
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Duraczyńska D, Michalik-Zym A, Napruszewska BD, Dula R, Socha RP, Lityńska-Dobrzyńska L, Gaweł A, Bahranowski K, Serwicka EM. Efficient and Versatile Ru/SBA-15 Catalysts for Liquid-Phase Hydrogenation of the C=C and C=O Bonds under Mild Conditions. ChemistrySelect 2016. [DOI: 10.1002/slct.201600491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dorota Duraczyńska
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
| | - Alicja Michalik-Zym
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
| | - Bogna D. Napruszewska
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
| | - Roman Dula
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
| | - Robert P. Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
| | - Lidia Lityńska-Dobrzyńska
- Institute of Metallurgy and Materials Science of Polish Academy of Sciences; Reymonta 25 30-059 Krakow Poland
| | - Adam Gaweł
- Faculty of Geology, Geophysics and Environmental Protection; AGH-University of Science and Technology; al. Mickiewicza 30 30-059 Krakow Poland
| | - Krzysztof Bahranowski
- Faculty of Geology, Geophysics and Environmental Protection; AGH-University of Science and Technology; al. Mickiewicza 30 30-059 Krakow Poland
| | - Ewa M. Serwicka
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences; Niezapominajek 8 30-239 Krakow Poland
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20
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Wojnicki M, Rudnik E, Luty-Błocho M, Socha RP, Pędzich Z, Fitzner K, Mech K. Kinetic Studies of Gold Recovery from Diluted Chloride Aqueous Solutions Using Activated Carbon Organosorb 10 CO. Aust J Chem 2016. [DOI: 10.1071/ch15275] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The kinetic studies of gold(iii) chloride complex ions recovery from acidic solution using activated carbon (AC) were carried out using spectrophotometry. AC samples were characterized in terms of surface area, porosity, and zeta potential. The surface functional groups were also identified. It was found that adsorption of AuCl4– onto AC was followed by reduction of the ions to the metallic form. The process obeyed the first order reaction model, but the reaction was controlled by diffusion. Arrhenius and Eyring–Polanyi equations were used for determination of the activation parameters. Distribution of gold across the AC pellets was also determined and discussed according to the porous material theory.
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Wojnicki M, Luty-Błocho M, Socha RP, Mech K, Pędzich Z, Fitzner K, Rudnik E. Kinetic studies of sorption and reduction of gold(III) chloride complex ions on activated carbon Norit ROX 0.8. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.03.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Hnida KE, Bäβler S, Akinsinde L, Gooth J, Nielsch K, Socha RP, Łaszcz A, Czerwinski A, Sulka GD. Tuning the polarity of charge transport in InSb nanowires via heat treatment. Nanotechnology 2015; 26:285701. [PMID: 26112309 DOI: 10.1088/0957-4484/26/28/285701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
InSb nanowire (NW) arrays were prepared by pulsed electrodeposition combined with a porous template technique. The resulting polycrystalline material has a stoichiometric composition (In:Sb = 1:1) and a high length-to-diameter ratio. Based on a combination of Fourier transform infrared spectroscopy (FTIR) analysis and field-effect measurements, the band gap, the charge carrier polarity, the carrier concentration, the mobility and the effective mass for the InSb NWs was investigated. In this preliminary work, a transition from p-type to n-type charge transport was observed when the InSb NWs were subjected to annealing.
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Affiliation(s)
- Katarzyna E Hnida
- Jagiellonian University in Krakow, Department of Physical Chemistry and Electrochemistry, Ingardena 3, 30-060 Krakow, Poland. AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, A. Mickiewicza 30, 30-059 Krakow, Poland
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Kruk T, Szczepanowicz K, Stefańska J, Socha RP, Warszyński P. Synthesis and antimicrobial activity of monodisperse copper nanoparticles. Colloids Surf B Biointerfaces 2015; 128:17-22. [PMID: 25723345 DOI: 10.1016/j.colsurfb.2015.02.009] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 01/30/2015] [Accepted: 02/04/2015] [Indexed: 10/24/2022]
Abstract
Metallic monodisperse copper nanoparticles at a relatively high concentration (300 ppm CuNPs) have been synthesized by the reduction of copper salt with hydrazine in the aqueous SDS solution. The average particles size and the distribution size were characterized by Dynamic Light Scattering (DLS), Nanosight-Nanoparticle Tracking Analysis (NTA). The morphology and structure of nanoparticles were investigated using Scanning Electron Microscopy (SEM). The chemical composition of the copper nanoparticles was determined by X-ray Photoelectron Spectroscopy (XPS). Monodisperse copper nanoparticles with average diameter 50 nm were received. UV/vis absorption spectra confirmed the formation of the nanoparticles with the characteristic peak 550 nm. The antimicrobial studies showed that the copper nanoparticles had high activity against Gram-positive bacteria, standard and clinical strains, including methicillin-resistant Staphylococcus aureus, comparable to silver nanoparticles and some antibiotics. They also exhibited antifungal activity against Candida species.
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Affiliation(s)
- Tomasz Kruk
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland.
| | - Krzysztof Szczepanowicz
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
| | - Joanna Stefańska
- Medical University of Warsaw, Department of Pharmaceutical Microbiology, Warsaw, Poland
| | - Robert P Socha
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
| | - Piotr Warszyński
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
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Szyk-Warszyńska L, Kilan K, Socha RP. Characterization of casein and poly-l-arginine multilayer films. J Colloid Interface Sci 2014; 423:76-84. [DOI: 10.1016/j.jcis.2014.02.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 02/20/2014] [Accepted: 02/21/2014] [Indexed: 10/25/2022]
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Wodka D, Bielańska E, Socha RP, Elzbieciak-Wodka M, Gurgul J, Nowak P, Warszyński P, Kumakiri I. Photocatalytic activity of titanium dioxide modified by silver nanoparticles. ACS Appl Mater Interfaces 2010; 2:1945-1953. [PMID: 20568701 DOI: 10.1021/am1002684] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Photocatalytic activity of Ag/TiO(2) composites obtained by photoreduction treatment (PRT) was investigated. The composite materials, containing various ratio of silver nanoparticles (0.6-3.7 wt %) were obtained by depositing silver on the Evonic-Degussa P25 titania surface. Selected samples whose color varied between light rose and purple brown were examined by SEM, TEM, XPS, DRS, and BET techniques. Flat band potential was determined using Roy method. TEM analysis showed spherically shaped silver nanoparticles of the diameter 4-12 nm. The XPS measurements revealed that silver particles were obtained mainly in metallic form. DRS spectra and photovoltage measurements showed that silver nanoparticles modified the P25 spectral properties but they changed neither the band gap nor the location of flat band potential. The photocatalytic activity of Ag/P25 composite was compared to the photocatalytic activity of pure P25 in the photooxidation reaction of an important potable water contaminant humic acid (HA) and two model compounds, oxalic acid (OxA) and formic acid (FA). The photodecomposition reaction was investigated in a batch reactor containing aqueous suspension of a photocatalyst illuminated by either UV or artificial sunlight (halogen lamp). The tests proved that a small amount of silver nanoparticles deposited on the titania surface triggers the increase in photocatalytic activity; this increase depends, however, on the decomposed substance.
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Affiliation(s)
- Dawid Wodka
- Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Krakow, Poland
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Szyk-Warszyńska L, Gergely C, Jarek E, Cuisinier F, Socha RP, Warszyński P. Calcium uptake by casein embedded in polyelectrolyte multilayer. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.01.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Dzwigaj S, Janas J, Mizera J, Gurgul J, Socha RP, Che M. Incorporation of Copper in SiBEA Zeolite as Isolated Lattice Mononuclear Cu(II) Species and its Role in Selective Catalytic Reduction of NO by Ethanol. Catal Letters 2008. [DOI: 10.1007/s10562-008-9675-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Łabanowska M, Bidzińska E, Dyrek K, Fortuna T, Pietrzyk S, Rożnowski J, Socha RP. Cu2+ Ions as a Paramagnetic Probe in EPR Studies of Radicals Generated Thermally in Starch. STARCH-STARKE 2008. [DOI: 10.1002/star.200800648] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Socha RP, Nowak P, Laajalehto K, Väyrynen J. Particle-electrode surface interaction during nickel electrodeposition from suspensions containing SiC and SiO2 particles. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.01.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Socha RP. In-line annealing?a new approach to the extrusion of high quality rigid vinyl products. POLYM ENG SCI 1966. [DOI: 10.1002/pen.760060313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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