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Rónavári A, Balázs M, Szilágyi Á, Molnár C, Kotormán M, Ilisz I, Kiricsi M, Kónya Z. Multi-round recycling of green waste for the production of iron nanoparticles: synthesis, characterization, and prospects in remediation. Nanoscale Res Lett 2023; 18:8. [PMID: 36757485 PMCID: PMC9911567 DOI: 10.1186/s11671-023-03784-x] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023]
Abstract
Due to the widespread applications of metal nanoparticles (NPs), green synthesis strategies have recently advanced, e.g., methods that utilize extracts made from different plant wastes. A particularly innovative approach to reducing large amounts of available household/agricultural green wastes is their application in nanoparticle generation. Regarding this, the aim of our work was to examine the possibility of upgrading green nanoparticle syntheses from an innovative economic and environmental point of view, namely by investigating the multiple recyclabilities of green tea (GT), coffee arabica (CA), and Virginia creeper (Parthenocissus quinquefolia) (VC) waste residues for iron nanoparticle (FeNPs) synthesis. The plant extracts obtained by each extraction round were analyzed individually to determine the amount of main components anticipated to be involved in NPs synthesis. The synthesized FeNPs were characterized by X-ray powder diffraction and transmission electron microscopy. The activity of the generated FeNPs in degrading chlorinated volatile organic compounds (VOC) and thus their future applicability for remediation purposes were also assessed. We have found that VC and especially GT residues could be reutilized in multiple extraction rounds; however, only the first extract of CA was suitable for FeNPs' generation. All of the obtained FeNPs could degrade VOC with efficiencies GT1-Fe 91.0%, GT2-Fe 83.2%, GT3-Fe 68.5%; CA1-Fe 76.2%; VC1-Fe 88.2%, VC2-Fe 79.7%, respectively, where the number (as in GT3) marked the extraction round. These results indicate that the adequately selected green waste material can be reutilized in multiple rounds for nanoparticle synthesis, thus offering a clean, sustainable, straightforward alternative to chemical methods.
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Affiliation(s)
- Andrea Rónavári
- grid.9008.10000 0001 1016 9625Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
| | - Margit Balázs
- Division for Biotechnology, Bay Zoltan Nonprofit Ltd. for Applied Research, Szeged, Hungary
| | - Árpád Szilágyi
- grid.9008.10000 0001 1016 9625Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52, Szeged, 6726 Hungary
| | - Csaba Molnár
- grid.516087.dKoch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA USA
| | - Márta Kotormán
- grid.9008.10000 0001 1016 9625Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52, Szeged, 6726 Hungary
| | - István Ilisz
- grid.9008.10000 0001 1016 9625Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Mónika Kiricsi
- Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary.
| | - Zoltán Kónya
- grid.9008.10000 0001 1016 9625Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary ,ELKH-SZTE Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary
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Nagy FI, Adamecz DI, Baji Á, Kiricsi Á, Huliák I, Rónavári A, Kónya Z, Frank É, Gopisetty MK, Kiricsi M. Semi-Synthetic Dihydrotestosterone Derivatives Modulate Inherent Multidrug Resistance and Sensitize Colon Cancer Cells to Chemotherapy. Pharmaceutics 2023; 15. [PMID: 36839907 DOI: 10.3390/pharmaceutics15020584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/21/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
Multidrug resistance (MDR) is a serious hurdle to successful cancer therapy. Here, we examined the efficiency of novel semi-synthetic dihydrotestosterone derivatives, more specifically androstano-arylpyrimidines in inhibiting the efflux activity of ATP-binding cassette (ABC) transporters and sensitizing inherently MDR colon cancer cells to various chemotherapy drugs. Using the Rhodamine123 accumulation assay, we evaluated the efflux activity of cancer cells following treatments with androstano-arylpyrimidines. We found that acetylated compounds were capable of attenuating the membrane efflux of inherently MDR cells; however, deacetylated counterparts were ineffective. To delineate the possible molecular mechanisms underlying these unique activities of androstano-arylpyrimidines, the degree of apoptosis induction was assessed by AnnexinV-based assays, both upon the individual as well as by steroid and chemotherapy agent combination treatments. Five dihydrotestosterone derivatives applied in combination with Doxorubicin or Epirubicin triggered massive apoptosis in MDR cells, and these combinations were more efficient than chemotherapy drugs together with Verapamil. Furthermore, our results revealed that androstano-arylpyrimidines induced significant endoplasmic reticulum stress (ER stress) but did not notably modulate ABC transporter expression. Therefore, ER stress triggered by acetylated androstano-arylpyrimidines is probably involved in the mechanism of efflux pump inhibition and drug sensitization which can be targeted in future drug developments to defeat inherently multidrug-resistant cancer.
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Marković A, Savić S, Kukuruzar A, Konya Z, Manojlović D, Ognjanović M, Stanković DM. Differently Prepared PbO2/Graphitic Carbon Nitride Composites for Efficient Electrochemical Removal of Reactive Black 5 Dye. Catalysts 2023; 13:328. [DOI: 10.3390/catal13020328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In this paper, electrochemical degradation of Reactive Black 5 (RB5) textile azo dye was examined in regard to different synthesis procedures for making PbO2–graphitic carbon nitride (g-C3N4) electrode. The reaction of with ClO− in the presence of different surfactants, i.e., cetyltrimethylammonium bromide (CTAB) and tetrabutylammonium phosphate (TBAP), under conventional conditions, resulted in the formation of PbO2 with varying morphology. The obtained materials were combined with g-C3N4 for the preparation of the final composite materials, which were then characterized morphologically and electrochemically. After optimizing the degradation method, it was shown that an anode comprising a steel electrode coated with the composite of PbO2 synthesized using CTAB as template and g-C3N4, and using 0.15 M Na2SO4 as the supporting electrolyte, gave the best performance for RB5 dye removal from a 35 mg/L solution. The treatment duration was 60 min, applying a current of 0.17 A (electrode surface 4 cm2, current density of 42.5 mA/cm2), while the initial pH of the testing solution was 2. The reusability and longevity of the electrode surface (which showed no significant change in activity throughout the study) may suggest that this approach is a promising candidate for wastewater treatment and pollutant removal.
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Abedi M, Szamosvölgyi Á, Sápi A, Kukovecz Á, Kónya Z, Gyulavári T, Pap Z. Influence of Rapid Heat Treatment on the Photocatalytic Activity and Stability of Strontium Titanates against a Broad Range of Pollutants. Catalysts 2023; 13:219. [DOI: 10.3390/catal13020219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Strontium titanate (STO) photocatalysts were prepared via a slightly modified Pechini sol–gel method. A unique rapid calcination technique with a short exposure time was used to obtain crystalline products. The samples were characterized by X-ray diffractometry, scanning electron microscopy, diffuse reflectance spectroscopy, infrared spectroscopy, nitrogen adsorption–desorption measurements, and X-ray photoelectron spectroscopy. Their photocatalytic activity was evaluated by the photocatalytic oxidation of phenol, oxalic acid, and chlorophenol under UV light irradiation using commercial STO as a reference. These pollutants, together with glucose and propanol, were used to investigate the stability of the samples against various functional groups. All our samples exhibited higher photocatalytic activity than the commercial STO reference. With increasing calcination temperature, the crystallinity and primary crystallite sizes increased while the band gaps and specific surface areas decreased. The photocatalytic activity of the most efficient sample was explained by the presence of SrCO3 on its surface. The STO catalysts were highly stable as they largely retained their crystalline composition after exposure to chemicals with different functional groups. Finally, we compared the costs associated with the unique calcination technique with a more conventional one and found that our method is ~35% more cost-effective.
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Ádám AA, Ziegenheim S, Janovák L, Szabados M, Bús C, Kukovecz Á, Kónya Z, Dékány I, Sipos P, Kutus B. Binding of Ca 2+ Ions to Alkylbenzene Sulfonates: Micelle Formation, Second Critical Concentration and Precipitation. Materials (Basel) 2023; 16:ma16020494. [PMID: 36676235 PMCID: PMC9864979 DOI: 10.3390/ma16020494] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/20/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023]
Abstract
Anionic surfactants, such as sodium linear alkylbenzene sulfonates (NaLAS), are utilized in various fields, including industry, household, and agriculture. The efficiency of their use in aqueous environments is significantly affected by the presence of cations, Ca2+ and Mg2+ in particular, as they can decrease the concentration of the surfactant due to precipitation. To understand cation-sulfonate interactions better, we study both NaLAS colloidal solutions in the presence of CaCl2 and precipitates forming at higher salt concentrations. Upon addition of CaCl2, we find the surface tension and critical micelle concentration of NaLAS to decrease significantly, in line with earlier findings for alkylbenzylsulfonates in the presence of divalent cations. Strikingly, an increase in the surface tension is discernible above 0.6 g L-1 NaLAS, accompanied by the decrease of apparent micelle sizes, which in turn gives rise to transparent systems. Thus, there appears to be a second critical concentration indicating another micellar equilibrium. Furthermore, the maximum salt tolerance of the surfactant is 0.1 g L-1 Ca2+, above which rapid precipitation occurs yielding sparingly soluble CaLAS2∙2H2O.
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Affiliation(s)
- Adél Anna Ádám
- Department of Organic Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | | | - László Janovák
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
| | - Márton Szabados
- Department of Organic Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Csaba Bús
- Department of Organic Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Ákos Kukovecz
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Imre Dékány
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
| | - Pál Sipos
- Department of Inorganic and Analytical Chemistry, University of Szeged, H-6720 Szeged, Hungary
- Correspondence: (P.S.); (B.K.)
| | - Bence Kutus
- Department of Inorganic and Analytical Chemistry, University of Szeged, H-6720 Szeged, Hungary
- Correspondence: (P.S.); (B.K.)
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Benkó T, Shen S, Németh M, Su J, Szamosvölgyi Á, Kovács Z, Sáfrán G, Al-Zuraiji SM, Horváth EZ, Sápi A, Kónya Z, Pap JS. BiVO4 charge transfer control by a water-insoluble iron complex for solar water oxidation. Applied Catalysis A: General 2023. [DOI: 10.1016/j.apcata.2023.119035] [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: 01/15/2023]
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Szabó Y, Kiss MA, Kónya Z, Kukovecz Á, Pálinkó I, Sipos P, Frank É, Szabados M. Microwave-induced base-catalyzed synthesis of methyl levulinate, a further improvement in dimethyl carbonate-mediated valorization of levulinic acid. Applied Catalysis A: General 2023. [DOI: 10.1016/j.apcata.2022.119020] [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: 01/11/2023]
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Yadav M, Szenti I, Ábel M, Szamosvölgyi Á, Ábrahámné KB, Kiss J, Zsolt P, Sápi A, Kukovecz Á, Kónya Z. Concentrated Platinum‐Gallium Nanoalloy for Hydrogen Production from the Catalytic Steam Reforming of Ethanol. ChemCatChem 2022. [DOI: 10.1002/cctc.202200717] [Citation(s) in RCA: 1] [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: 11/20/2022]
Affiliation(s)
- Mohit Yadav
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Imre Szenti
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Marietta Ábel
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Ákos Szamosvölgyi
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Kornélia B Ábrahámné
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - János Kiss
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Pap Zsolt
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - András Sápi
- Szegedi Tudomanyegyetem Applied and Environmental Chemistry Rerrich tér 1 6720 Szeged HUNGARY
| | - Ákos Kukovecz
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
| | - Zoltán Kónya
- University of Szeged: Szegedi Tudomanyegyetem Department of Applied and Environmental Chemistry HUNGARY
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Szerlauth A, Kónya ZD, Papp G, Kónya Z, Kukovecz Á, Szabados M, Varga G, Szilágyi I. Molecular orientation rules the efficiency of immobilized antioxidants. J Colloid Interface Sci 2022; 632:260-270. [DOI: 10.1016/j.jcis.2022.11.056] [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] [Received: 08/28/2022] [Revised: 11/01/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
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Malik AS, Bali H, Czirok F, Szamosvölgyi Á, Halasi G, Efremova A, Šmíd B, Sápi A, Kukovecz Á, Kónya Z. Turning CO2 to CH4 and CO over CeO2 and MCF-17 supported Pt, Ru and Rh nanoclusters – Influence of nanostructure morphology, supporting materials and operating conditions. Fuel 2022. [DOI: 10.1016/j.fuel.2022.124994] [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: 11/04/2022]
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Al-Aqtasha O, Farkas F, Sápi A, Szenti I, Boldizsár T, B.Ábrahámné K, Kukovecz Á, Kónya Z. Differently shaped Al2O3-based Pd catalysts loaded catalytic converter for novel non-road mobile machinery exhaust systems. Reac Kinet Mech Cat 2022. [DOI: 10.1007/s11144-022-02291-x] [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: 10/14/2022]
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Kovács I, Ötvös F, Farkas AP, Kiss J, Kónya Z. A round dance of acetaldehyde molecular ensembles on Rh(111) surface; formation and decomposition of various paraldehyde conformers. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133311] [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: 11/28/2022]
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Hursán D, Ábel M, Baán K, Fako E, Samu GF, Nguyën HC, López N, Atanassov P, Kónya Z, Sápi A, Janáky C. CO 2 Conversion on N-Doped Carbon Catalysts via Thermo- and Electrocatalysis: Role of C–NO x Moieties. ACS Catal 2022; 12:10127-10140. [PMID: 36033366 PMCID: PMC9397536 DOI: 10.1021/acscatal.2c01589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 07/21/2022] [Indexed: 11/29/2022]
Abstract
![]()
N-doped carbon (N–C) materials are increasingly
popular
in different electrochemical and catalytic applications. Due to the
structural and stoichiometric diversity of these materials, however,
the role of different functional moieties is still controversial.
We have synthesized a set of N–C catalysts, with identical
morphologies (∼27 nm pore size). By systematically changing
the precursors, we have varied the amount and chemical nature of N-functions
on the catalyst surface. The CO2 reduction (CO2R) properties of these catalysts were tested in both electrochemical
(EC) and thermal catalytic (TC) experiments (i.e., CO2 +
H2 reaction). CO was the major CO2R product
in all cases, while CH4 appeared as a minor product. Importantly,
the CO2R activity changed with the chemical composition,
and the activity trend was similar in the EC and TC scenarios. The
activity was correlated with the amount of different N-functions,
and a correlation was found for the −NOx species. Interestingly, the amount of this species decreased
radically during EC CO2R, which was coupled with the performance
decrease. The observations were rationalized by the adsorption/desorption
properties of the samples, while theoretical insights indicated a
similarity between the EC and TC paths.
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Affiliation(s)
- Dorottya Hursán
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
| | - Marietta Ábel
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
| | - Kornélia Baán
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
| | - Edvin Fako
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Gergely F. Samu
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
| | - Huu Chuong Nguyën
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Núria López
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Plamen Atanassov
- Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, California 92697, United States
- National Fuel Cell Research Center, University of California Irvine, Irvine, California 92697, United States
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
| | - András Sápi
- Department of Applied and Environmental Chemistry, University of Szeged, H-6720 Szeged, Hungary
| | - Csaba Janáky
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Excellence Centre, University of Szeged, H-6720 Szeged, Hungary
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Odhiambo VO, Le Ba T, Kónya Z, Cserháti C, Erdélyi Z, C Naomi M, Miklós Szilágyi I. Preparation of TiO2–MoO3 composite nanofibers by water-based electrospinning process and their application in photocatalysis. Materials Science in Semiconductor Processing 2022. [DOI: 10.1016/j.mssp.2022.106699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kozma G, Rónavári A, Kónya Z, Kukovecz Á. Mechanochemically induced solid-state CO2 capture during the synthesis of SnO2 nanoparticles. Journal of Physics and Chemistry of Solids 2022. [DOI: 10.1016/j.jpcs.2022.110775] [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: 11/30/2022]
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Szabó V, Mészáros R, Kónya Z, Kukovecz Á, Pálinkó I, Sipos P, Szabados M. Preparation and characterization of MnIn-layered double hydroxides (LDHs), extension of the synthesis to fabricate MnM(III)-LDHs (M = Al, Sc, Cr, Fe, Ga), and the comparison of their photocatalytic and catalytic activities in the oxidation of hydroquinone. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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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Szamosvölgyi Á, Rajkumar T, Sápi A, Szenti I, Ábel M, Gómez-Pérez JF, Baán K, Fogarassy Z, Dodony E, Pécz B, Garg S, Kiss J, Kukovecz Á, Kónya Z. Interfacial Ni active sites strike solid solutional counterpart in CO2 hydrogenation. Environmental Technology & Innovation 2022. [DOI: 10.1016/j.eti.2022.102747] [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: 10/18/2022]
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Karádi K, Kukovecz Á, Kónya Z, Sipos P, Pálinkó I, Varga G. Niacin and niacin-pillared layered double hydroxides—Novel organocatalysts based on pyridine. J Mol Struct 2022; 1261:132868. [DOI: 10.1016/j.molstruc.2022.132868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Musza K, Mészáros R, Baán K, Kónya Z, Kukovecz Á, Pálinkó I, Sipos P, Szabados M. Mechanochemical preparation of NiCuSn nanoparticles and composites in presence of cetyltrimethylammonium bromide (CTAB) and the catalytic application of the products in homocoupling and hydration of terminal alkynes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132948] [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: 11/28/2022]
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Igaz N, Bélteky P, Kovács D, Papp C, Rónavári A, Szabó D, Gácser A, Kónya Z, Kiricsi M. Functionalized Mesoporous Silica Nanoparticles for Drug-Delivery to Multidrug-Resistant Cancer Cells. Int J Nanomedicine 2022; 17:3079-3096. [PMID: 35859731 PMCID: PMC9293248 DOI: 10.2147/ijn.s363952] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 07/06/2022] [Indexed: 12/12/2022] Open
Abstract
Background Multidrug resistance is a common reason behind the failure of chemotherapy. Even if the therapy is effective, serious adverse effects might develop due to the low specificity and selectivity of antineoplastic agents. Mesoporous silica nanoparticles (MSNs) are promising materials for tumor-targeting and drug-delivery due to their small size, relatively inert nature, and extremely large specific surfaces that can be functionalized by therapeutic and targeting entities. We aimed to create a fluorescently labeled MSN-based drug-delivery system and investigate their internalization and drug-releasing capability in drug-sensitive MCF-7 and P-glycoprotein-overexpressing multidrug-resistant MCF-7 KCR cancer cells. Methods and Results To track the uptake and subcellular distribution of MSNs, particles with covalently coupled red fluorescent Rhodamine B (RhoB) were produced (RhoB@MSNs). Both MCF-7 and MCF-7 KCR cells accumulated a significant amount of RhoB@MSNs. The intracellular RhoB@MSN concentrations did not differ between sensitive and multidrug-resistant cells and were kept at the same level even after cessation of RhoB@MSN exposure. Although most RhoB@MSNs resided in the cytoplasm, significantly more RhoB@MSNs co-localized with lysosomes in multidrug-resistant cells compared to sensitive counterparts. To examine the drug-delivery capability of these particles, RhoB@Rho123@MSNs were established, where RhoB-functionalized nanoparticles carried green fluorescent Rhodamine 123 (Rho123) - a P-glycoprotein substrate - as cargo within mesopores. Significantly higher Rho123 fluorescence intensity was detected in RhoB@Rho123@MSN-treated multidrug-resistant cells than in free Rho123-exposed counterparts. The exceptional drug-delivery potential of MSNs was further verified using Mitomycin C (MMC)-loaded RhoB@MSNs (RhoB@MMC@MSNs). Exposures to RhoB@MMC@MSNs significantly decreased the viability not only of drug-sensitive but of multidrug-resistant cells and the elimination of MDR cells was significantly more robust than upon free MMC treatments. Conclusion The efficient delivery of Rho123 and MMC to multidrug-resistant cells via MSNs, the amplified and presumably prolonged intracellular drug concentration, and the consequently enhanced cytotoxic effects envision the enormous potential of MSNs to defeat multidrug-resistant cancer.
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Affiliation(s)
- Nóra Igaz
- Department of Biochemistry and Molecular Biology, University of Szeged, Szeged, Hungary
| | - Péter Bélteky
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
| | - Dávid Kovács
- Department of Biochemistry and Molecular Biology, University of Szeged, Szeged, Hungary.,Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Inserm, CNRS, Valbonne, France
| | - Csaba Papp
- HCEMM-USZ Fungal Pathogens Research Group, Department of Microbiology, University of Szeged, Szeged, Hungary
| | - Andrea Rónavári
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
| | - Diána Szabó
- Department of Oto-Rhino-Laryngology and Head & Neck Surgery, Szeged, Hungary
| | - Attila Gácser
- HCEMM-USZ Fungal Pathogens Research Group, Department of Microbiology, University of Szeged, Szeged, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary.,Eötvös Loránd Research Network, Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary
| | - Mónika Kiricsi
- Department of Biochemistry and Molecular Biology, University of Szeged, Szeged, Hungary
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Bartus Pravda C, Hegedűs T, Oliveira EF, Berkesi D, Szamosvölgyi Á, Kónya Z, Vajtai R, Kukovecz Á. Hexagonal Boron Nitride Nanosheets Protect Exfoliated Black Phosphorus Layers from Ambient Oxidation. Adv Materials Inter 2022. [DOI: 10.1002/admi.202200857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Cora Bartus Pravda
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
| | - Tímea Hegedűs
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
| | | | - Dániel Berkesi
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
| | - Ákos Szamosvölgyi
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
| | - Zoltán Kónya
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
- MTA‐SZTE Reaction Kinetics and Surface Chemistry Research Group University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
| | - Róbert Vajtai
- Department of Materials Science and NanoEngineering Rice University 6100 Main Street Houston Texas 77005 USA
| | - Ákos Kukovecz
- Interdisciplinary Excellence Centre Department of Applied and Environmental Chemistry University of Szeged Rerrich Béla tér 1 Szeged H‐6720 Hungary
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22
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Bartus CP, Hegedűs T, Kozma G, Szenti I, Vajtai R, Kónya Z, Kukovecz Á. Exfoliation of black phosphorus in isopropanol-water cosolvents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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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23
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Chawla H, Garg S, Rohilla J, Szamosvölgyi Á, Efremova A, Szenti I, Ingole PP, Sápi A, Kónya Z, Chandra A. Visible LED-light driven photocatalytic degradation of organochlorine pesticides (2,4-D & 2,4-DP) by Curcuma longa mediated bismuth vanadate. Journal of Cleaner Production 2022. [DOI: 10.1016/j.jclepro.2022.132923] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Bohus M, Ba TL, Hernadi K, Gróf G, Kónya Z, Erdélyi Z, Parditka B, Igricz T, Szilágyi IM. Thermal Conductivity Enhancement of Atomic Layer Deposition Surface-Modified Carbon Nanosphere and Carbon Nanopowder Nanofluids. Nanomaterials 2022; 12:nano12132226. [PMID: 35808062 PMCID: PMC9267995 DOI: 10.3390/nano12132226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/18/2022] [Accepted: 06/21/2022] [Indexed: 12/03/2022]
Abstract
In this paper, we present a study on thermal conductivity and viscosity of nanofluids containing novel atomic layer deposition surface-modified carbon nanosphere (ALD-CNS) and carbon nanopowder (ALD-CNP) core-shell nanocomposites. The nanocomposites were produced by atomic layer deposition of amorphous TiO2. The nanostructures were characterised by scanning (SEM) and transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetry/differential thermal analysis (TG/DTA) and X-ray powder diffraction (XRD). High-concentration, stable nanofluids were prepared with 1.5, 1.0 and 0.5 vol% nanoparticle content. The thermal conductivity and viscosity of the nanofluids were measured, and their stability was evaluated with Zeta potential measurements. The ALD-CNS enhanced the thermal conductivity of the 1:5 ethanol:water mixture by 4.6% with a 1.5 vol% concentration, and the viscosity increased by 37.5%. The ALD-CNS increased the thermal conductivity of ethylene–glycol by 10.8, whereas the viscosity increased by 15.9%. The use of a surfactant was unnecessary due to the ALD-deposited TiO2 layer.
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Affiliation(s)
- Marcell Bohus
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem Rakpart 3, 1111 Budapest, Hungary;
- Correspondence: (M.B.); (I.M.S.)
| | - Thong Le Ba
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem Rakpart 3, 1111 Budapest, Hungary;
| | - Klara Hernadi
- Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary;
| | - Gyula Gróf
- Centre for Energy Research, Konkoly-Thege Miklós út 29-33, 1121 Budapest, Hungary;
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, 6720 Szeged, Hungary;
| | - Zoltán Erdélyi
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary; (Z.E.); (B.P.)
| | - Bence Parditka
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary; (Z.E.); (B.P.)
| | - Tamás Igricz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary;
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem Rakpart 3, 1111 Budapest, Hungary;
- Correspondence: (M.B.); (I.M.S.)
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Kozma G, Lipták K, Deák C, Rónavári A, Kukovecz Á, Kónya Z. Conversion Study on the Formation of Mechanochemically Synthesized BaTiO3. Chemistry 2022; 4:592-602. [DOI: 10.3390/chemistry4020042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Mechanochemistry is a method that can cover the energy demand of reaction pathways between solid materials. This requires enough energy to maintain the reactions between the starting materials. This is called “high-energy milling”. In our case, a planetary ball mill provided the required energy. Using the Burgio-equation, the required energy is determinable; the energy released during a single impact of a milling ball (Eb), as well as during the whole milling process (Ecum). The aim of this work was the one-step production of BaTiO3 from BaO and TiO2 starting materials. Whereas during mechanochemical reactions it is possible to produce nanoparticles of up to 10 nm, the essence of this study is to develop the preparation of BaTiO3 with a perovskite structure even without subsequent heat treatment, since sintering at high temperatures is associated with a rapid increase in the size of the particles. By describing the synthesis parameters and their energy values (Eb and Ecum), it is possible to transpose experimental conditions, so that in the case of other types of planetary ball mills or grinding vessel made of other materials, the results can be used. In this study, the mechanical treatment was carried out with a Fritsch Pulverisette-6 planetary ball mill and the transformation of the starting materials was investigated by X-ray diffractometric, Raman and Energy-dispersive X-ray spectroscopic, and transmission electron microscopic measurements.
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Prekob Á, Szamosvölgyi Á, Muránszky G, Lakatos J, Kónya Z, Fiser B, Viskolcz B, Vanyorek L. Palladium Decorated N-Doped Carbon Foam as a Highly Active and Selective Catalyst for Nitrobenzene Hydrogenation. Int J Mol Sci 2022; 23:6423. [PMID: 35742865 DOI: 10.3390/ijms23126423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 01/07/2023] Open
Abstract
Carbon foam was synthesized by the carbonization of 4-nitroaniline. The reaction is an alternative of the well-known “carbon snake” (or sugar snake) demonstration experiment, which leads to the formation of nitrogen-doped carbon foils due to its nitrogen content. The synthesized carbon foils were grinded to achieve an efficient catalyst support. Palladium nanoparticles were deposited onto the surface of the support, which showed continuous distribution. The prepared Pd nanoparticle decorated carbon foils showed high catalytic activity in nitrobenzene hydrogenation. By applying the designed catalyst, total nitrobenzene conversion, a 99.1 n/n% aniline yield, and an exceptionally high selectivity (99.8 n/n%) were reached. Furthermore, the catalyst remained active during the reuse tests (four cycles) even without regeneration.
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Bhagya T, Elias L, Kiss J, Kónya Z, Manoj S, Shibli S. Interfacial charge separation of nickel phosphide anchored on anatase-hematite heterojunction for stimulating visible light driven hydrogen generation. International Journal of Hydrogen Energy 2022. [DOI: 10.1016/j.ijhydene.2022.05.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chawla H, Garg S, Upadhyay S, Rohilla J, Szamosvölgyi Á, Sapi A, Popinand Ingole P, Sagadevan S, Kónya Z, Chandra A. Efficient charge separation and improved photocatalytic activity in Type-II & Type-III heterojunction based multiple interfaces in BiOCl 0.5Br 0.5-Q: DFT and Experimental Insight. Chemosphere 2022; 297:134122. [PMID: 35257701 DOI: 10.1016/j.chemosphere.2022.134122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 02/18/2022] [Accepted: 02/24/2022] [Indexed: 11/21/2022]
Abstract
The nanostructured, inner-coupled Bismuth oxyhalides (BiOX0.5X'0.5; X, X' = Cl, Br, I; X≠X') heterostructures were prepared using Quercetin (Q) as a sensitizer. The present study revealed the tuning of the band properties of as-prepared catalysts. The catalysts were characterized using various characterization techniques for evaluating the superior photocatalytic efficiency and a better understanding of elemental interactions at interfaces formed in the heterojunction. The material (BiOCl0.5Br0.5-Q) reflected higher degradation of MO (about 99.85%) and BPA (98.34%) under visible light irradiation than BiOCl0.5I0.5-Q and BiOBr0.5I0.5-Q. A total of 90.45 percent of total organic carbon in BPA was removed after visible light irradiation on BiOCl0.5Br0.5-Q. The many-fold increase in activity is attributed to the formation of multiple interfaces between halides, conjugated π-electrons and multiple -OH groups of quercetin (Q). The boost in degradation efficiency can be attributed to the higher surface area, 2-D nanostructure, inhibited electron-hole recombination, and appropriate band-gap of the heterostructure. Photo-response of BiOCl0.5Br0.5-Q is higher compared to BiOCl0.5I0.5-Q and BiOBr0.5I0.5-Q, indicating better light absorption properties and charge separation efficiency in BiOCl0.5Br0.5-Q due to band edge position. First-principles Density Functional Theory (DFT) based calculations have also provided an insightful understanding of the interface formation, physical mechanism, and superior photocatalytic performance of BiOCl0.5Br0.5-Q heterostructure over other samples.
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Gyulavári T, Dusnoki D, Márta V, Yadav M, Abedi M, Sápi A, Kukovecz Á, Kónya Z, Pap Z. Dependence of Photocatalytic Activity on the Morphology of Strontium Titanates. Catalysts 2022; 12:523. [DOI: 10.3390/catal12050523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Strontium titanates were prepared with different morphologies by varying the ratio of solvents used during the synthesis. The effects of morphology and solvent (ethylene glycol to water) ratio were investigated both on the structure and photocatalytic activity of the samples. Structural properties were determined by X-ray diffraction, scanning electron microscopy, diffuse reflectance spectroscopy, and nitrogen adsorption measurements. The photocatalytic activity of the samples was evaluated by the photocatalytic oxidation of phenol and by the photocatalytic reduction of carbon dioxide. The ratio of solvents notably influenced the morphology, strontium carbonate content, primary crystallite size, and specific surface area of the samples. Samples prepared at low ethylene glycol to water ratios were spherical, while the ones prepared at high ethylene glycol to water ratios could be characterized predominantly by lamellar morphology. The former samples were found to have the highest efficiency for phenol degradation, while the sample with the most well-defined lamellar morphology proved to be the best for CO2 reduction.
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Szitás Á, Farkas AP, Faur V, Nikolett B, Kiss J, Kónya Z. Investigation of the adsorption properties of cyclic C6 molecules on h-BN/Rh(111) surface, efforts to cover the boron nitride nanomesh by graphene. Surfaces and Interfaces 2022. [DOI: 10.1016/j.surfin.2022.102034] [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: 10/18/2022]
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Ziegenheim S, Sztegura A, Szabados M, Kónya Z, Kukovecz Á, Pálinkó I, Sipos P. EDTA analogues – unconventional inhibitors of gypsum precipitation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132491] [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: 10/19/2022]
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32
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Papp IZ, Alegría A, Kónya Z, Kukovecz Á. Investigation into the effect of ZnO nanorod coating on the thermal-mechanical and dielectric properties of ITO coated PET. Materials Research Bulletin 2022; 149:111701. [DOI: 10.1016/j.materresbull.2021.111701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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33
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Szabó A, Szekeres GP, Gyulavári T, Tóth ZR, Pápa Z, Szamosvölgyi Á, Sápi A, Kónya Z, Hernadi K. Systematic investigation of experimental parameters on nitrogen incorporation into carbon nanotube forests. Materials Research Bulletin 2022; 148:111676. [DOI: 10.1016/j.materresbull.2021.111676] [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: 11/23/2022]
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34
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Vajdle O, Mutić S, Lazić S, Kónya Z, Guzsvány V, Anojčić J. Rapid direct cathodic voltammetric determination of insecticide flonicamid by renewable silver-amalgam film electrode. International Journal of Environmental Analytical Chemistry 2022. [DOI: 10.1080/03067319.2022.2054706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Olga Vajdle
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Sanja Mutić
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Sanja Lazić
- Department of Phytomedicine and Environmental Protection, Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary
| | - Valéria Guzsvány
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Jasmina Anojčić
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
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35
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Meera MS, Sasidharan SK, Hossain A, Kiss J, Kónya Z, Elias L, Shibli SMA. Effect of Excess B in Ni 2P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting. ACS Appl Energy Mater 2022. [DOI: 10.1021/acsaem.1c04086] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Muraleedharan Sheela Meera
- Department of Chemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
| | - Sreekala Keerthi Sasidharan
- Department of Nanotechnology, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
| | - Aslam Hossain
- Centre for Renewable Energy and Materials, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
| | - János Kiss
- ELKH-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. 1., H-6720 Szeged, Hungary
| | - Zoltán Kónya
- ELKH-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. 1., H-6720 Szeged, Hungary
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. 1., H-6720 Szeged, Hungary
| | - Liju Elias
- Department of Chemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
| | - Sheik Muhammadhu Aboobakar Shibli
- Department of Chemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
- Centre for Renewable Energy and Materials, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581, India
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Muráth S, Varga T, Kukovecz Á, Kónya Z, Sipos P, Pálinkó I, Varga G. Morphological aspects determine the catalytic activity of porous hydrocalumites: the role of the sacrificial templates. Materials Today Chemistry 2022. [DOI: 10.1016/j.mtchem.2021.100682] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Dobó DG, Németh Z, Sipos B, Cseh M, Pallagi E, Berkesi D, Kozma G, Kónya Z, Csóka I. Pharmaceutical Development and Design of Thermosensitive Liposomes Based on the QbD Approach. Molecules 2022; 27:1536. [PMID: 35268637 PMCID: PMC8911568 DOI: 10.3390/molecules27051536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 02/01/2023] Open
Abstract
This study aimed to produce thermosensitive liposomes (TSL) by applying the quality by design (QbD) concept. In this paper, our research group collected and studied the parameters that significantly impact the quality of the liposomal product. Thermosensitive liposomes are vesicles used as drug delivery systems that release the active pharmaceutical ingredient in a targeted way at ~40–42 °C, i.e., in local hyperthermia. This study aimed to manufacture thermosensitive liposomes with a diameter of approximately 100 nm. The first TSLs were made from DPPC (1,2-dipalmitoyl-sn-glycerol-3-phosphocholine) and DSPC (1,2-dioctadecanoyl-sn-glycero-3-phosphocholine) phospholipids. Studies showed that the application of different types and ratios of lipids influences the thermal properties of liposomes. In this research, we made thermosensitive liposomes using a PEGylated lipid besides the previously mentioned phospholipids with the thin-film hydration method.
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Boldizsár T, Mucsi R, Szamosvölgyi Á, Szenti I, Halasi G, Sápi A, Kukovecz Á, Kónya Z. Optimalization of ceramic-based noble metal-free catalysts for CO oxidation reactions. Reac Kinet Mech Cat 2022; 135:575-87. [DOI: 10.1007/s11144-022-02166-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Efremova A, Szenti I, Kiss J, Szamosvölgyi Á, Sápi A, Baán K, Olivi L, Varga G, Fogarassy Z, Pécz B, Kukovecz Á, Kónya Z. Nature of the Pt-Cobalt-Oxide surface interaction and its role in the CO2 Methanation. Applied Surface Science 2022; 571:151326. [DOI: 10.1016/j.apsusc.2021.151326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Akel H, Csóka I, Ambrus R, Bocsik A, Gróf I, Mészáros M, Szecskó A, Kozma G, Veszelka S, Deli MA, Kónya Z, Katona G. In Vitro Comparative Study of Solid Lipid and PLGA Nanoparticles Designed to Facilitate Nose-to-Brain Delivery of Insulin. Int J Mol Sci 2021; 22:13258. [PMID: 34948054 DOI: 10.3390/ijms222413258] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 01/25/2023] Open
Abstract
The brain insulin metabolism alteration has been addressed as a pathophysiological factor underlying Alzheimer's disease (AD). Insulin can be beneficial in AD, but its macro-polypeptide nature negatively influences the chances of reaching the brain. The intranasal (IN) administration of therapeutics in AD suggests improved brain-targeting. Solid lipid nanoparticles (SLNs) and poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) are promising carriers to deliver the IN-administered insulin to the brain due to the enhancement of the drug permeability, which can even be improved by chitosan-coating. In the present study, uncoated and chitosan-coated insulin-loaded SLNs and PLGA NPs were formulated and characterized. The obtained NPs showed desirable physicochemical properties supporting IN applicability. The in vitro investigations revealed increased mucoadhesion, nasal diffusion, and drug release rate of both insulin-loaded nanocarriers over native insulin with the superiority of chitosan-coated SLNs. Cell-line studies on human nasal epithelial and brain endothelial cells proved the safety IN applicability of nanoparticles. Insulin-loaded nanoparticles showed improved insulin permeability through the nasal mucosa, which was promoted by chitosan-coating. However, native insulin exceeded the blood-brain barrier (BBB) permeation compared with nanoparticulate formulations. Encapsulating insulin into chitosan-coated NPs can be beneficial for ensuring structural stability, enhancing nasal absorption, followed by sustained drug release.
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Kristó K, Manteghi R, Ibrahim YHEY, Ungor D, Csapó E, Berkesi D, Kónya Z, Csóka I. Optimization of layering technique and secondary structure analysis during the formulation of nanoparticles containing lysozyme by quality by design approach. PLoS One 2021; 16:e0260603. [PMID: 34882727 PMCID: PMC8659335 DOI: 10.1371/journal.pone.0260603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 11/13/2021] [Indexed: 12/03/2022] Open
Abstract
In our study, core-shell nanoparticles containing lysozyme were formulated with precipitation and layering self-assembly. Factorial design (DoE) was applied by setting the process parameters during the preparation with Quality by Design (QbD) approach. The factors were the concentration of lysozyme and sodium alginate, and pH. Our aim was to understand the effect of process parameters through the determination of mathematical equations, based on which the optimization parameters can be predicted under different process parameters. The optimization parameters were encapsulation efficiency, particle size, enzyme activity and the amount of α-helix structure. The nanoparticles were analysed with transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and circular dichroism (CD) spectroscopy. Based on our results, we found that pH was the most important factor and pH 10 was recommended during the formulation. Enzyme activity and α-helix content correlated with each other very well, and particle size and encapsulation efficiency also showed very good correlation with each other. The results of the α-helix content of FTIR and CD measurements were very similar for the precipitated lysozyme due to the solid state of lysozyme. The mixing time had the best influence on the encapsulation efficiency and the particle size, which leads to the conclusion that a mixing time of 1 h is recommended. The novelty in our study is the presentation of a mathematical model with which the secondary structure of the protein and other optimization parameters can be controlled in the future during development of nanoparticle based on the process parameters.
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Affiliation(s)
- Katalin Kristó
- Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Szeged, Hungary
| | - Reihaneh Manteghi
- Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Szeged, Hungary
| | - Yousif H-E. Y. Ibrahim
- Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Szeged, Hungary
| | - Ditta Ungor
- Department of Physical Chemistry and Materials Science, MTA-SZTE Lendület “Momentum” Noble Metal Nanostructures Research Group, Interdisciplinary Excellence Center, University of Szeged, Szeged, Hungary
| | - Edit Csapó
- Department of Physical Chemistry and Materials Science, MTA-SZTE Lendület “Momentum” Noble Metal Nanostructures Research Group, Interdisciplinary Excellence Center, University of Szeged, Szeged, Hungary
- Department of Medical Chemistry, MTA-SZTE Biomimetic Systems Research Group, University of Szeged, Szeged, Hungary
| | - Dániel Berkesi
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Szeged, Hungary
| | - Ildikó Csóka
- Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Szeged, Hungary
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42
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Hajdu V, Muránszky G, Hashimoto M, Kristály F, Szőri M, Fiser B, Kónya Z, Viskolcz B, Vanyorek L. Combustion method combined with sonochemical step for synthesis of maghemite-supported catalysts for the hydrogenation of 2,4-dinitrotoluene. CATAL COMMUN 2021; 159:106342. [DOI: 10.1016/j.catcom.2021.106342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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43
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Gómez-Pérez J, Pravda Bartus C, Szamosvölgyi Á, Sapi A, Kónya Z, Kukovecz Á. Electronic work function modulation of phosphorene by thermal oxidation. 2D Mater 2021. [DOI: 10.1088/2053-1583/ac2f21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Abstract
In this study, we evaluate the variation of the work function of phosphorene during thermal oxidation at different temperatures. The ultraviolet photoelectron spectroscopy results show an N-shaped behaviour that is explained by the oxidation process and the dangling-to-interstitial conversion at elevated temperatures. The exfoliation degree and x-ray photoelectron spectroscopy confirm the formation of native oxides in the top-most layer that passivates the material. Ex-situ XPS reveals the full oxidation of monolayers at temperatures higher than 140 °C, but few-layer phosphorene withstands the thermal oxidation even up to 200 °C with slight modifications of the A
2
g/A
1
g and A
2
g/B
2g vibrational mode ratios and a weak fluorescence in the Raman spectra of the heat-treated samples.
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44
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Bozó É, Ervasti H, Halonen N, Shokouh SHH, Tolvanen J, Pitkänen O, Järvinen T, Pálvölgyi PS, Szamosvölgyi Á, Sápi A, Konya Z, Zaccone M, Montalbano L, De Brauwer L, Nair R, Martínez-Nogués V, San Vicente Laurent L, Dietrich T, Fernández de Castro L, Kordas K. Bioplastics and Carbon-Based Sustainable Materials, Components, and Devices: Toward Green Electronics. ACS Appl Mater Interfaces 2021; 13:49301-49312. [PMID: 34609829 PMCID: PMC8532127 DOI: 10.1021/acsami.1c13787] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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] [Indexed: 11/29/2022]
Abstract
The continuously growing number of short-life electronics equipment inherently results in a massive amount of problematic waste, which poses risks of environmental pollution, endangers human health, and causes socioeconomic problems. Hence, to mitigate these negative impacts, it is our common interest to substitute conventional materials (polymers and metals) used in electronics devices with their environmentally benign renewable counterparts, wherever possible, while considering the aspects of functionality, manufacturability, and cost. To support such an effort, in this study, we explore the use of biodegradable bioplastics, such as polylactic acid (PLA), its blends with polyhydroxybutyrate (PHB) and composites with pyrolyzed lignin (PL), and multiwalled carbon nanotubes (MWCNTs), in conjunction with processes typical in the fabrication of electronics components, including plasma treatment, dip coating, inkjet and screen printing, as well as hot mixing, extrusion, and molding. We show that after a short argon plasma treatment of the surface of hot-blown PLA-PHB blend films, percolating networks of single-walled carbon nanotubes (SWCNTs) having sheet resistance well below 1 kΩ/□ can be deposited by dip coating to make electrode plates of capacitive touch sensors. We also demonstrate that the bioplastic films, as flexible dielectric substrates, are suitable for depositing conductive micropatterns of SWCNTs and Ag (1 kΩ/□ and 1 Ω/□, respectively) by means of inkjet and screen printing, with potential in printed circuit board applications. In addition, we exemplify compounded and molded composites of PLA with PL and MWCNTs as excellent candidates for electromagnetic interference shielding materials in the K-band radio frequencies (18.0-26.5 GHz) with shielding effectiveness of up to 40 and 46 dB, respectively.
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Affiliation(s)
- Éva Bozó
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Henri Ervasti
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Niina Halonen
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Seyed Hossein Hosseini Shokouh
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Jarkko Tolvanen
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Olli Pitkänen
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Topias Järvinen
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Petra S Pálvölgyi
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
| | - Ákos Szamosvölgyi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary
| | - András Sápi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary
| | - Zoltan Konya
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1, Szeged 6720, Hungary
| | - Marta Zaccone
- Proplast-Consorzio per la Promozione della Cultura Plastica, Via Roberto di Ferro, 86, 15122 Alessandria (AL), Italy
| | - Luana Montalbano
- Proplast-Consorzio per la Promozione della Cultura Plastica, Via Roberto di Ferro, 86, 15122 Alessandria (AL), Italy
| | - Laurens De Brauwer
- Bio Base Europe Pilot Plant VZW, Rodenhuizekaai 1, 9042 Desteldonk (Gent), Belgium
| | - Rakesh Nair
- Bio Base Europe Pilot Plant VZW, Rodenhuizekaai 1, 9042 Desteldonk (Gent), Belgium
| | | | - Leire San Vicente Laurent
- TECNALIA, Basque Research and Technology Alliance (BRTA), Health Division, Parque Tecnológico de Álava, Leonardo Da Vinci, 11, E-01510 Miñano, Araba, Spain
| | - Thomas Dietrich
- TECNALIA, Basque Research and Technology Alliance (BRTA), Health Division, Parque Tecnológico de Álava, Leonardo Da Vinci, 11, E-01510 Miñano, Araba, Spain
| | - Laura Fernández de Castro
- TECNALIA, Basque Research and Technology Alliance (BRTA), Health Division, Parque Tecnológico de Álava, Leonardo Da Vinci, 11, E-01510 Miñano, Araba, Spain
| | - Krisztian Kordas
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, FI-90570 Oulu, Finland
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45
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Szabados M, Gácsi A, Gulyás Y, Kónya Z, Kukovecz Á, Csányi E, Pálinkó I, Sipos P. Conventional or mechanochemically-aided intercalation of diclofenac and naproxen anions into the interlamellar space of CaFe-layered double hydroxides and their application as dermal drug delivery systems. Applied Clay Science 2021; 212:106233. [DOI: 10.1016/j.clay.2021.106233] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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46
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Kocsis M, Ötvös SB, Samu GF, Fogarassy Z, Pécz B, Kukovecz Á, Kónya Z, Sipos P, Pálinkó I, Varga G. Copper-Loaded Layered Bismuth Subcarbonate-Efficient Multifunctional Heterogeneous Catalyst for Concerted C-S/C-N Heterocyclization. ACS Appl Mater Interfaces 2021; 13:42650-42661. [PMID: 34477369 PMCID: PMC8447192 DOI: 10.1021/acsami.1c09234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Indexed: 11/28/2022]
Abstract
![]()
An efficient self-supported
Cu(II)Bi(III) bimetallic catalyst with
a layered structure was designed and developed. By careful characterization
of the as-prepared material, the host structure was identified to
exhibit a Sillen-type bismutite framework, with copper(II) ions being
loaded as guests. The heterogeneous catalyst enabled C–N and
C–S arylations under mild reaction conditions and with high
chemoselectivities, thus furnishing valuable phenothiazines via heterocyclization with wide substrate tolerance. As
corroborated by detailed catalytic studies, the cooperative, bifunctional
catalyst, bearing Lewis acid sites along with copper(II) catalytic
sites, facilitated an intriguing concerted C–N/C–S heterocyclization
mechanism. The heterogeneous nature of the catalytic reactions was
verified experimentally. Importantly, the catalyst was successfully
recycled and reused multiple times, persevering its original structural
order as well as its initial activity.
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Affiliation(s)
- Marianna Kocsis
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, Szeged H-6720, Hungary.,Materials and Solution Structure Research Group, and Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, Szeged H-6720, Hungary
| | - Sándor B Ötvös
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, Graz A-8010, Austria
| | - Gergely F Samu
- Department of Physical Chemistry and Materials Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
| | - Zsolt Fogarassy
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Konkoly, Thege M. út 29-33., Budapest 1121, Hungary
| | - Béla Pécz
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Konkoly, Thege M. út 29-33., Budapest 1121, Hungary
| | - Ákos Kukovecz
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Rerrich Béla tér 1, Szeged H-6720, Hungary
| | - Pál Sipos
- Materials and Solution Structure Research Group, and Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, Szeged H-6720, Hungary.,Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged H-6720, Hungary
| | - István Pálinkó
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, Szeged H-6720, Hungary.,Materials and Solution Structure Research Group, and Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, Szeged H-6720, Hungary
| | - Gábor Varga
- Materials and Solution Structure Research Group, and Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, Szeged H-6720, Hungary.,Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary
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47
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Kedves O, Kocsubé S, Bata T, Andersson MA, Salo JM, Mikkola R, Salonen H, Szűcs A, Kedves A, Kónya Z, Vágvölgyi C, Magyar D, Kredics L. Chaetomium and Chaetomium-like Species from European Indoor Environments Include Dichotomopilus finlandicus sp. nov. Pathogens 2021; 10:1133. [PMID: 34578165 DOI: 10.3390/pathogens10091133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/25/2021] [Accepted: 09/01/2021] [Indexed: 11/17/2022] Open
Abstract
The genus Chaetomium is a frequently occurring fungal taxon world-wide. Chaetomium and Chaetomium-like species occur in indoor environments, where they can degrade cellulose-based building materials, thereby causing structural damage. Furthermore, several species of this genus may also cause adverse effects on human health. The aims of this research were to identify Chaetomium and Chaetomium-like strains isolated from indoor environments in Hungary and Finland, two geographically distant regions of Europe with drier and wetter continental climates, respectively, and to study their morphological and physiological properties, as well as their extracellular enzyme activities, thereby comparing the Chaetomium and Chaetomium-like species isolated from these two different regions of Europe and their properties. Chaetomium and Chaetomium-like strains were isolated from flats and offices in Hungary, as well as from schools, flats, and offices in Finland. Fragments of the translation elongation factor 1α (tef1α), the second largest subunit of RNA polymerase II (rpb2) and β-tubulin (tub2) genes, as well as the internal transcribed spacer (ITS) region of the ribosomal RNA gene cluster were sequenced, and phylogenetic analysis of the sequences performed. Morphological examinations were performed by stereomicroscopy and scanning electron microscopy. Thirty-one Chaetomium sp. strains (15 from Hungary and 16 from Finland) were examined during the study. The most abundant species was Ch. globosum in both countries. In Hungary, 13 strains were identified as Ch. globosum, 1 as Ch. cochliodes, and 1 as Ch. interruptum. In Finland, 10 strains were Ch. globosum, 2 strains were Ch. cochliodes, 2 were Ch. rectangulare, and 2 isolates (SZMC 26527, SZMC 26529) proved to be representatives of a yet undescribed phylogenetic species from the closely related genus Dichotomopilus, which we formally describe here as the new species Dichotomopilus finlandicus. Growth of the isolates was examined at different temperatures (4, 15, 20, 25, 30, 37, 35, 40, and 45 °C), while their extracellular enzyme production was determined spectrophotometrically.
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48
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Szabados M, Ádám AA, Kása Z, Baán K, Mucsi R, Sápi A, Kónya Z, Kukovecz Á, Sipos P. M(II)Al 4 Type Layered Double Hydroxides-Preparation Using Mechanochemical Route, Structural Characterization and Catalytic Application. Materials (Basel) 2021; 14:ma14174880. [PMID: 34500969 PMCID: PMC8432663 DOI: 10.3390/ma14174880] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 12/02/2022]
Abstract
The synthesis of the copper-poor and aluminum-rich layered double hydroxides (LDHs) of the CuAl4 type was optimized in detail in this work, by applying an intense mechanochemical treatment to activate the gibbsite starting reagent. The phase-pure forms of these LDHs were prepared for the first time; using copper nitrate and perchlorate salts during the syntheses turned out to be the key to avoiding the formation of copper hydroxide sideproducts. Based on the use of the optimized syntheses parameters, the preparation of layered triple and multiple hydroxides was also attempted using Ni(II), Co(II), Zn(II) and even Mg(II) ions. These studies let us identify the relative positions of the incorporating cations in the well-known selectivity series as Ni2+ >> Cu2+ >> Zn2+ > Co2+ >> Mg2+. The solids formed were characterized by using powder X-ray diffractometry, UV–Vis diffuse reflectance spectroscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The catalytic potential of the samples was investigated in carbon monoxide oxidation reactions at atmospheric pressure, supported by an in situ diffuse reflectance infrared spectroscopy probe. All solids proved to be active and the combination of the nickel and cobalt incorporation (which resulted in a NiCoAl8 layered triple hydroxide) brought outstanding benefits regarding low-temperature oxidation and increased carbon monoxide conversion values.
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Affiliation(s)
- Márton Szabados
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary;
- Material and Solution Structure Research Group, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, H-6720 Szeged, Hungary; (A.A.Á.); (Z.K.)
| | - Adél Anna Ádám
- Material and Solution Structure Research Group, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, H-6720 Szeged, Hungary; (A.A.Á.); (Z.K.)
| | - Zsolt Kása
- Material and Solution Structure Research Group, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, H-6720 Szeged, Hungary; (A.A.Á.); (Z.K.)
| | - Kornélia Baán
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, H-6720 Szeged, Hungary; (K.B.); (R.M.); (A.S.); (Z.K.); (Á.K.)
| | - Róbert Mucsi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, H-6720 Szeged, Hungary; (K.B.); (R.M.); (A.S.); (Z.K.); (Á.K.)
| | - András Sápi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, H-6720 Szeged, Hungary; (K.B.); (R.M.); (A.S.); (Z.K.); (Á.K.)
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, H-6720 Szeged, Hungary; (K.B.); (R.M.); (A.S.); (Z.K.); (Á.K.)
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Rerrich B tér 1, H-6720 Szeged, Hungary
| | - Ákos Kukovecz
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, H-6720 Szeged, Hungary; (K.B.); (R.M.); (A.S.); (Z.K.); (Á.K.)
| | - Pál Sipos
- Material and Solution Structure Research Group, Institute of Chemistry, University of Szeged, Aradi Vértanúk tere 1, H-6720 Szeged, Hungary; (A.A.Á.); (Z.K.)
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Correspondence:
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49
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Rónavári A, Bélteky P, Boka E, Zakupszky D, Igaz N, Szerencsés B, Pfeiffer I, Kónya Z, Kiricsi M. Polyvinyl-Pyrrolidone-Coated Silver Nanoparticles-The Colloidal, Chemical, and Biological Consequences of Steric Stabilization under Biorelevant Conditions. Int J Mol Sci 2021; 22:8673. [PMID: 34445378 PMCID: PMC8395525 DOI: 10.3390/ijms22168673] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 07/19/2021] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 11/17/2022] Open
Abstract
(1) Background: Several properties of silver nanoparticles (AgNPs), such as cytotoxic, anticancer, and antimicrobial activities, have been subjects of intense research; however, important aspects such as nanoparticle aggregation are generally neglected, although a decline in colloidal stability leads to a loss of the desired biological activities. Colloidal stability is affected by pH, ionic strength, or a plethora of biomolecules that interact with AgNPs under biorelevant conditions. (2) Methods: As only a few studies have focused on the relationship between aggregation behavior and the biological properties of AgNPs, here, we have systematically evaluated this issue by completing a thorough analysis of sterically (via polyvinyl-pyrrolidone (PVP)) stabilized AgNPs that were subjected to different circumstances. We assessed ultraviolet-visible light absorption, dynamic light scattering, zeta potential measurements, in vitro cell viability, and microdilution assays to screen both colloidal stability as well as bioactivity. (3) Results: The results revealed that although PVP provided outstanding biorelevant colloidal stability, the chemical stability of AgNPs could not be maintained completely with this capping material. (4) Conclusion: These unexpected findings led to the realization that stabilizing materials have more profound importance in association with biorelevant applications of nanomaterials than just being simple colloidal stabilizers.
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Affiliation(s)
- Andrea Rónavári
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary; (A.R.); (P.B.); (E.B.); (D.Z.)
| | - Péter Bélteky
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary; (A.R.); (P.B.); (E.B.); (D.Z.)
| | - Eszter Boka
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary; (A.R.); (P.B.); (E.B.); (D.Z.)
| | - Dalma Zakupszky
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary; (A.R.); (P.B.); (E.B.); (D.Z.)
| | - Nóra Igaz
- Department of Biochemistry and Molecular Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary; (N.I.); (M.K.)
| | - Bettina Szerencsés
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary; (B.S.); (I.P.)
| | - Ilona Pfeiffer
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary; (B.S.); (I.P.)
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary; (A.R.); (P.B.); (E.B.); (D.Z.)
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, H-6720 Szeged, Hungary
| | - Mónika Kiricsi
- Department of Biochemistry and Molecular Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary; (N.I.); (M.K.)
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50
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Sajadi SM, Enayat S, Vásárhelyi L, Alabastri A, Lou M, Sassi LM, Kutana A, Bhowmick S, Durante C, Kukovecz Á, Puthirath AB, Kónya Z, Vajtai R, Boul P, Tiwary CS, Rahman MM, Ajayan PM. Three-dimensional printing of complex graphite structures. Carbon 2021; 181:260-9. [DOI: 10.1016/j.carbon.2021.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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