TY - JOUR AU - Szamosvölgyi, Ákos AU - Pitó, Ádám AU - Efremova, Anastasiia AU - Baán, Kornélia AU - Kutus, Bence AU - Suresh, Mutyala AU - Sápi, András AU - Szenti, Imre AU - Kiss, János AU - Kolonits, Tamás AU - Fogarassy, Zsolt AU - Pécz, Béla AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Optimized Pt–Co Alloy Nanoparticles for Reverse Water–Gas Shift Activation of CO 2 JF - ACS APPLIED NANO MATERIALS J2 - ACS APPL NANO MATER VL - 7 PY - 2024 SP - 9968 EP - 9977 PG - 10 SN - 2574-0970 DO - 10.1021/acsanm.4c00111 UR - https://m2.mtmt.hu/api/publication/34832862 ID - 34832862 LA - English DB - MTMT ER - TY - JOUR AU - Solymos, Karolina AU - Babcsányi, Izabella AU - Ariya, Badam AU - Gyulavári, Tamás AU - Ágoston, Áron AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Pap, Zsolt TI - Environmental significance of the interaction between titanium dioxides and soil solutions JF - ENVIRONMENTAL SCIENCES EUROPE J2 - ENVIRON SCI EUR VL - 36 PY - 2024 IS - 1 SN - 2190-4707 DO - 10.1186/s12302-024-00903-y UR - https://m2.mtmt.hu/api/publication/34826699 ID - 34826699 AB - Nanotechnology, especially in the field of photocatalysis, has witnessed rapid advancements, with titanium dioxide being one of the most widely used photocatalysts. As the use of products containing photoactive nanomaterials increases, concerns have arisen regarding their potential release into the environment over time. This release can impact soil, groundwater, and surrounding ecosystems, resulting in nanoparticles being dispersed in water and eventually depleted from the system. This study aimed to investigate how different soil solutions affect the structural, textural properties, and photocatalytic activity of titanium dioxide-based, commercial reference Evonik Aeroxide P25. The Regosol soil solution, characterized by acidic pH, low ionic content, and high organic matter content, induced nanoparticle aggregation and bandgap changes. In addition, the acidic pH hindered the adsorption process, potentially affecting the photocatalytic processes. In contrast, the Chernozem soil solution, with slightly alkaline pH, high ionic content, and low organic matter content, did not significantly alter the morphology or structure of the material. However, various organic compounds were absorbed on the surface, reducing the availability of active sites. The study highlights the importance of understanding the influence of soil solutions on nanomaterials, as it impacts their properties and environmental risks. Results show that the material is still activated, i.e., it can exert its photoactive effect on the environment. This sheds light on the challenges posed by nanoparticles in soil, particularly in terms of their toxicity and consequences for the surrounding ecosystems. The study underlines the need for further research in this area to assess potential risks and optimise the use of nanomaterials in environmental remediation. LA - English DB - MTMT ER - TY - JOUR AU - Bús, Csaba AU - Kocsis, Marianna AU - Ágoston, Áron AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Sipos, Pál TI - Application of Alcohols to Inhibit the Formation of Ca(II) Dodecyl Sulfate Precipitate in Aqueous Solutions JF - MATERIALS J2 - MATERIALS VL - 17 PY - 2024 IS - 8 SN - 1996-1944 DO - 10.3390/ma17081806 UR - https://m2.mtmt.hu/api/publication/34826232 ID - 34826232 AB - The presence of alkaline earth cations, in particular, Ca2+ and Mg2+ ions in brine, causes undesired effects in solutions containing anionic surfactants because of precipitate formation. In the present study, an anionic surfactant, sodium dodecyl sulfate (SDS), was investigated, focusing on the determination of various properties (surface tension, critical micelle concentration, micelle size, turbidity) in the presence of alcohols and, in particular, the inhibition of the precipitation of SDS with calcium ions. The calcium ions were added to the surfactant in increasing concentrations (3.0–10.0 g/L), and short-carbon-chain alcohols (methanol, ethanol, n-propanol and n-butanol) were used to shift the onset of precipitate formation. The critical micelle concentration (CMC) of SDS in the presence of alcohols was also determined. It was established that among these alcohols, methanol and ethanol did not exert significant effects on the solubility of the Ca(DS)2 precipitate, while n-propanol and n-butanol were found to be much more efficient inhibitors. In addition, all the alcohols in the applied concentration range (up to 20 V/V%) were found to decrease the critical micelle concentration of SDS. LA - English DB - MTMT ER - TY - JOUR AU - Mészáros, Rebeka Ildikó AU - Szabó, Vivien AU - Kutus, Bence AU - Baán, Kornélia AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Sipos, Pál Miklós AU - Szabados, Márton TI - Continuous-flow hydrogenation of cinnamaldehyde over catalysts derived from modified CoAl4 layered double hydroxides incorporating Mn, Ni, Cu and Zn ions JF - APPLIED CATALYSIS A-GENERAL J2 - APPL CATAL A-GEN VL - 679 PY - 2024 PG - 14 SN - 0926-860X DO - 10.1016/j.apcata.2024.119738 UR - https://m2.mtmt.hu/api/publication/34801853 ID - 34801853 N1 - Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös utca 6, Szeged, H-6720, Hungary Materials and Solution Structure Research Group, Interdisciplinary Excellence Centre, Institute of Chemistry, University of Szeged, Aradi vértanúk tere 1, Szeged, H-6720, Hungary Department of Molecular and Analytical Chemistry, University of Szeged, Dóm tér 7-8, Szeged, H-6720, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged, H-6720, Hungary MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Rerrich B. tér 1, Szeged, H-6720, Hungary Export Date: 8 May 2024 CODEN: ACAGE Correspondence Address: Szabados, M.; Materials and Solution Structure Research Group, Aradi vértanúk tere 1, Hungary; email: szabados.marton@chem.u-szeged.hu Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, GINOP-2.3.4-15-2020-00006 Funding details: BO/00246/21/7 Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-23-5-SZTE-714, ÚNKP-22-5-SZTE-589 Funding text 1: The authors are very thankful for the financial support from the National Research, Development and Innovation Office (GINOP-2.3.4-15-2020-00006). M\\u00E1rton Szabados gratefully acknowledges the support of Bolyai Janos Research Fellowship (BO/00246/21/7) of the Hungarian Academy of Science and the \\u00DANKP-23-5-SZTE-714 New National Excellence Program of the Ministry for the Innovation and Technology from the Source of the National Research, Development and Innovation Office. Funding text 2: The authors are very thankful for the financial support from the National Research, Development and Innovation Office (GINOP-2.3.4-15-2020-00006). M\\u00E1rton Szabados gratefully acknowledges the support of Bolyai Janos Research Fellowship (BO/00246/21/7) of the Hungarian Academy of Science and the \\u00DANKP-22-5-SZTE-589 New National Excellence Program of the Ministry for the Innovation and Technology from the Source of the National Research, Development and Innovation Office. LA - English DB - MTMT ER - TY - JOUR AU - El Aouni, Aicha AU - El Ouardi, Mohamed AU - Arab, Madjid AU - Saadi, Mohamed AU - Haspel, Henrik AU - Kónya, Zoltán AU - Ben Ali, Abdelkader AU - Jada, Amane AU - BaQais, Amal AU - Ait Ahsaine, Hassan TI - Design of Bismuth Tungstate Bi2WO6 Photocatalyst for Enhanced and Environmentally Friendly Organic Pollutant Degradation JF - MATERIALS J2 - MATERIALS VL - 17 PY - 2024 IS - 5 SP - 1029 SN - 1996-1944 DO - 10.3390/ma17051029 UR - https://m2.mtmt.hu/api/publication/34688462 ID - 34688462 AB - In this study, a chemical precipitation approach was adopted to produce a photocatalyst based on bismuth tungstate Bi2WO6 for enhanced and environmentally friendly organic pollutant degradation. Various tools such as X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), optical spectroscopy and X-ray photoelectron spectroscopy, were employed to assess the structural and morphological properties. Hence, the XRD profiles showed a well crystallized Bi2WO6 orthorhombic phase. The photocatalytic performance of the resulting photocatalyst was assessed by the decomposition of Rhodamine B (RhB) and methyl orange (MO) with a decomposition efficiency of 97 and 92%, along with the highest chemical oxygen demand of 82 and 79% during 120 min of illumination, respectively. The principal novelty of the present work is to focus on the changes in the crystalline structure, the morphology, and the optical and the photoelectrochemical characteristics of the Bi2WO6, by tuning the annealing temperature of the designed photocatalyst. Such physicochemical property changes in the as-prepared photocatalyst will affect in turn its photocatalytic activity toward the organic pollutant decomposition. The photocatalytic mechanism was elaborated based on electrochemical impedance spectroscopy, photocurrent analysis, photoluminescence spectroscopy, and radical trapping measurements. The overall data indicate that the superoxide O2•− and holes h+ are the principal species responsible for the pollutant photodegradation. LA - English DB - MTMT ER - TY - JOUR AU - Rónavári, Andrea AU - Ochirkhuyag, Altantuya AU - Igaz, Nóra AU - Szerencsés, Bettina AU - Ballai, Gergő AU - Huliák, Ildikó AU - Bocz, Csenge AU - Kovács, Ákos AU - Pfeiffer, Ilona AU - Csontné Kiricsi, Mónika AU - Kónya, Zoltán TI - Preparation, characterization and in vitro evaluation of the antimicrobial and antitumor activity of MnOx nanoparticles JF - COLLOIDS AND SURFACES A : PHYSICOCHEMICAL AND ENGINEERING ASPECTS J2 - COLLOID SURFACE A VL - 688 PY - 2024 SN - 0927-7757 DO - 10.1016/j.colsurfa.2024.133528 UR - https://m2.mtmt.hu/api/publication/34687262 ID - 34687262 LA - English DB - MTMT ER - TY - JOUR AU - Najari, Sara AU - Saeidi, Samrand AU - Sápi, András AU - Szamosvölgyi, Ákos AU - Papp, Ádám AU - Efremova, Anastasiia AU - Bali, Henrik AU - Kónya, Zoltán TI - Synergistic enhancement of CO2 hydrogenation to C5+ hydrocarbons using mixed Fe5C2 and Na-Fe3O4 catalysts: Effects of oxide/carbide ratio, proximity, and reduction JF - CHEMICAL ENGINEERING JOURNAL J2 - CHEM ENG J VL - 485 PY - 2024 PG - 16 SN - 1385-8947 DO - 10.1016/j.cej.2024.149787 UR - https://m2.mtmt.hu/api/publication/34646124 ID - 34646124 LA - English DB - MTMT ER - TY - JOUR AU - Fabrikov, Dmitri AU - Varga, Ágnes Timea AU - García, María Carmen Vargas AU - Bélteky, Péter AU - Kozma, Gábor AU - Kónya, Zoltán AU - López Martínez, Josefa L. AU - Barroso, Fernando AU - Sánchez-Muros, María José TI - Antimicrobial and antioxidant activity of encapsulated tea polyphenols in chitosan/alginate-coated zein nanoparticles: a possible supplement against fish pathogens in aquaculture JF - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH J2 - ENVIRON SCI POLLUT R VL - 31 PY - 2024 SP - 13673 EP - 13687 PG - 15 SN - 0944-1344 DO - 10.1007/s11356-024-32058-x UR - https://m2.mtmt.hu/api/publication/34535462 ID - 34535462 AB - Regulation of antibiotic use in aquaculture calls for the emergence of more sustainable alternative treatments. Tea polyphenols (GTE), particularly epigallocatechin gallate (EGCG), have various biological activities. However, tea polyphenols are susceptible to degradation. In this work, EGCG and GTE were encapsulated in zein nanoparticles (ZNP) stabilized with alginate (ALG) and chitosan (CS) to reduce the degradation effect. ALG-coated ZNP and ALG/CS-coated ZNP encapsulating EGCG or GTE were obtained with a hydrodynamic size of less than 300 nm, an absolute ζ -potential value >30 mV, and an encapsulation efficiency greater than 75%. The antioxidant capacity of the encapsulated substances, although lower than that of the free ones, maintained high levels. On the other hand, the evaluation of antimicrobial activity showed greater efficiency in terms of growth inhibition for ALG/CS-ZNP formulations, with average overall values of around 60%, reaching an inhibition of more than 90% for Photobacterium damselae . These results support encapsulation as a good strategy for tea polyphenols, as it allows maintaining significant levels of antioxidant activity and increasing the potential for antimicrobial activity, in addition to increasing protection against sources of degradation. LA - English DB - MTMT ER - TY - JOUR AU - Solymos, Karolina AU - Babcsányi, Izabella AU - Ariya, Badam AU - Gyulavári, Tamás AU - Ágoston, Áron AU - Szamosvölgyi, Ákos AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Farsang, Andrea AU - Pap, Zsolt TI - Photocatalytic and surface properties of titanium dioxide nanoparticles in soil solutions JF - ENVIRONMENTAL SCIENCE-NANO J2 - ENVIRON SCI-NANO VL - 11 PY - 2024 IS - 3 SP - 1204 EP - 1216 PG - 13 SN - 2051-8153 DO - 10.1039/D3EN00622K UR - https://m2.mtmt.hu/api/publication/34513997 ID - 34513997 AB - Nanotechnology has emerged as a rapidly growing scientific field with diverse applications. Titanium dioxide nanoparticles are among the most commonly used nanoparticles due to their unique properties. However, their release... LA - English DB - MTMT ER - TY - JOUR AU - Szenti, Imre AU - Efremova, Anastasiia AU - Kiss, János AU - Sápi, András AU - Óvári, László AU - Halasi, Gyula AU - Haselmann, Ulrich AU - Zhang, Zhaoli AU - Morales-Vidal, Jordi AU - Baán, Kornélia AU - Kukovecz, Ákos AU - López, Núria AU - Kónya, Zoltán TI - Pt/MnO Interface Induced Defects for High Reverse Water Gas Shift Activity JF - ANGEWANDTE CHEMIE-INTERNATIONAL EDITION J2 - ANGEW CHEM INT EDIT VL - 63 PY - 2024 IS - 8 PG - 7 SN - 1433-7851 DO - 10.1002/anie.202317343 UR - https://m2.mtmt.hu/api/publication/34471429 ID - 34471429 AB - The implementation of supported metal catalysts heavily relies on the synergistic interactions between metal nanoparticles and the material they are dispersed on. It is clear that interfacial perimeter sites have outstanding skills for turning catalytic reactions over, however, high activity and selectivity of the designed interface‐induced metal distortion can also obtain catalysts for the most crucial industrial processes as evidenced in this paper. Herein, the beneficial synergy established between designed Pt nanoparticles and MnO in the course of the reverse water gas shift (RWGS) reaction resulted in a Pt/MnO catalyst having ~10 times higher activity compared to the reference Pt/SBA‐15 catalyst with >99% CO selectivity. Under activation, a crystal assembly through the metallic Pt (110) and MnO evolved, where the plane distance differences caused a mismatched row structure in softer Pt nanoparticles, which was identified by microscopic and surface‐sensitive spectroscopic characterizations combined with density functional theory simulations. The generated edge dislocations caused the Pt lattice expansion which led to the weakening of the Pt‐CO bond. Even though MnO also exhibited an adverse effect on Pt by lowering the number of exposed metal sites, rapid desorption of the linearly adsorbed CO species governed the performance of the Pt/MnO in the RWGS. LA - English DB - MTMT ER -