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 - 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 - Prekob, Ádám AU - Szegedi, Máté Péter AU - Muránszky, Gábor AU - Kristály, Ferenc AU - Nagy, Miklós AU - Halasi, Gyula AU - Szamosvölgyi, Ákos AU - Fiser, Béla AU - Viskolcz, Béla AU - Vanyorek, László TI - Development of Magnetizable, Nickel–Ferrite-Decorated Carbon Nanocomposites as Hydrogenation Catalyst for Aniline Synthesis JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 24 PG - 16 SN - 1661-6596 DO - 10.3390/ijms242417547 UR - https://m2.mtmt.hu/api/publication/34441840 ID - 34441840 N1 - Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Institute of Mineralogy and Geology, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla Square 1., Szeged, 6720, Hungary ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner Utca 3., Szeged, H-6728, Hungary Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, Beregszász, 90200, Ukraine Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Lodz, 90-236, Poland Export Date: 31 January 2024 Correspondence Address: Vanyorek, L.; Institute of Chemistry, Miskolc-Egyetemváros, Hungary; email: laszlo.vanyorek@uni-miskolc.hu AB - Catalysts with magnetic properties can be easily recovered from the reaction medium without loss by using a magnetic field, which highly improves their applicability. To design such systems, we have successfully combined the magnetic properties of nickel ferrite nanoparticles with the positive properties of carbon-based catalyst supports. Amine-functionalized NiFe2O4 nanoparticles were deposited on the surfaces of nitrogen-doped bamboo-like carbon nanotubes (N-BCNT) and carbon nanolayers (CNL) by using a coprecipitation process. The magnetizable catalyst supports were decorated by Pd nanoparticles, and their catalytic activity was tested through the hydrogenation of nitrobenzene (NB). By using the prepared catalysts, high nitrobenzene conversion (100% for 120 min at 333 K) and a high aniline yield (99%) were achieved. The Pd/NiFe2O4-CNL catalyst was remarkable in terms of stability during the reuse tests due to the strong interaction formed between the catalytically active metal and its support (the activity was retained during four cycles of 120 min at 333 K). Furthermore, despite the long-lasting mechanical stress, no significant palladium loss (only 0.08 wt%) was detected. LA - English DB - MTMT ER - TY - JOUR AU - Yadav, Mohit AU - Gyulavári, Tamás AU - Kiss, János AU - Ábrahámné, Kornélia B. AU - Efremova, Anastasiia AU - Szamosvölgyi, Ákos AU - Pap, Zsolt AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Noble metal nanoparticles and nanodiamond modified strontium titanate photocatalysts for room temperature CO production from direct hydrogenation of CO2 JF - JOURNAL OF CO2 UTILIZATION J2 - J CO2 UTIL VL - 78 PY - 2023 PG - 9 SN - 2212-9820 DO - 10.1016/j.jcou.2023.102621 UR - https://m2.mtmt.hu/api/publication/34395096 ID - 34395096 LA - English DB - MTMT ER - TY - JOUR AU - Varga, Gábor AU - Szenti, Imre AU - Kiss, János AU - Baán, Kornélia AU - Halasi, Gyula AU - Óvári, László AU - Szamosvölgyi, Ákos AU - Mucsi, Róbert AU - Dodony, Erzsébet AU - Fogarassy, Zsolt AU - Pécz, Béla AU - Olivi, Luca AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Decisive role of Cu/Co interfaces in copper cobaltite derivatives for high performance CO2 methanation catalyst JF - JOURNAL OF CO2 UTILIZATION J2 - J CO2 UTIL VL - 75 PY - 2023 PG - 13 SN - 2212-9820 DO - 10.1016/j.jcou.2023.102582 UR - https://m2.mtmt.hu/api/publication/34120023 ID - 34120023 AB - Thermo-catalytic bio-SNG (CH4) production is one of the useful tools for converting waste to gaseous fuels through CO2 conversion. To abundant properly, however, efficient, robust and cost-effective catalysts would be required. Bimetallic systems based on transition metals seem to be promising candidates for this task. The CoCu bimetallic system with in-situ generated interfaces was synthesized and used as a catalyst for CO2 methanation. The in-depth analysis of the structure-activity-selectivity relationships involving XRD, (NAP-)XPS, EXAFS and TEM-EDX revealed that the co-existence of Co0, CoO, and Cu0 in the proper distribution on the surface can ensure the selective production of methane. To fine-tune the surface composition of the bimetallic systems, a systematic alteration of the Cu:Co ratio in the precursor spinel structures must be performed. Cu0.4Co2.6O4 derivative, stabilizing subsurface Cu(I)–O specimen, showed the best performance with high activity (12,800 nmol g–1 s–1) and a remarkable selectivity of 65–85% for methane in a wide temperature range (250–425 °C). In studying the mechanistic aspects of methanation, it has been shown that the hydrogenation of active carbon at the surface or below the surface is the key step for the production of methane. So far, this cobalt-catalyzed sub-step has been proposed in catalytic Fischer-Tropsch syntheses. LA - English DB - MTMT ER - TY - JOUR AU - Szabados, Márton AU - Szabados, Tamara AU - Mucsi, Róbert AU - Baán, Kornélia AU - Kiss, János AU - Szamosvölgyi, Ákos AU - Sápi, András AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Sipos, Pál Miklós TI - Directed thermocatalytic CO2 reduction over NiAl4 layered double hydroxide precursors − activity and selectivity control using different interlayer anions JF - JOURNAL OF CO2 UTILIZATION J2 - J CO2 UTIL VL - 75 PY - 2023 PG - 13 SN - 2212-9820 DO - 10.1016/j.jcou.2023.102567 UR - https://m2.mtmt.hu/api/publication/34105840 ID - 34105840 LA - English DB - MTMT ER - TY - JOUR AU - Kedves, Endre-Zsolt AU - Fodor, Claudiu AU - Fazekas, Ákos Ferenc AU - Székely, István AU - Szamosvölgyi, Ákos AU - Sápi, András AU - Kónya, Zoltán AU - Cristian Pop, Lucian AU - Baia, Lucian AU - Pap, Zsolt TI - α-MoO3 with inhibitive properties in Fenton reactions and insights on its general impact on OH radical based advanced oxidation processes JF - APPLIED SURFACE SCIENCE J2 - APPL SURF SCI VL - 624 PY - 2023 PG - 11 SN - 0169-4332 DO - 10.1016/j.apsusc.2023.156914 UR - https://m2.mtmt.hu/api/publication/33693480 ID - 33693480 N1 - Faculty of Physics, Babeş-Bolyai University, M. Kogălniceanu 1, Cluj-Napoca, RO-400084, Romania Centre of Nanostructured Materials and Bio-Nano Interfaces, Institute for Interdisciplinary, Research on Bio-Nano-Sciences, Treboniu Laurian 42, Cluj-Napoca, RO-400271, Romania Department of Applied and Environmental Chemistry, University of Szeged, Rerrich tér 1, HU-6720, Szeged, Hungary Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Street 11, Cluj-Napoca, RO-400028, Romania Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary Laboratory for Advanced Materials and Applied Technologies, Institute for Research, Development and Innovation in Applied Natural Sciences, Fântânele 30, Cluj-Napoca, RO-400294, Romania Export Date: 20 April 2023 CODEN: ASUSE Correspondence Address: Baia, L.; Laboratory for Advanced Materials and Applied Technologies, Romania; email: lucian.baia@ubbcluj.ro Funding details: 2019-2.1.13-TÉT_IN-2020-00015 Funding details: Magyar Tudományos Akadémia, MTA, UNKP-21-5- SZTE- 575, UNKP-21-5-SZTE-586 Funding details: Emberi Eroforrások Minisztériuma, EMMI, 20391-3/2018/FEKUSTRAT, EFOP-3.6.1-16-2016-00014, K_21 138714, SNN_135918 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, TKP2021-NVA-19 Funding details: Innovációs és Technológiai Minisztérium Funding text 1: Endre-Zsolt Kedves is very grateful for NTP-NFTÖ scholarship (NTP-NFTÖ-21-B-0284). ZsP and AS gratefully acknowledges the support of the Bolyai Janos Research Fellowship of the Hungarian Academy of Science and the “UNKP-21-5-SZTE-586” and “UNKP-21-5- SZTE- 575” New National Excellence Program as well as the funding provided by the Indo-Hungarian TÉT project (2019-2.1.13-TÉT_IN-2020-00015) of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. The Ministry of Human Capacities through the EFOP-3.6.1-16-2016-00014 project and the 20391-3/2018/FEKUSTRAT are acknowledged. ZK is grateful for K_21 138714 and SNN_135918 project for the Hungarian National Research, Development and Innovation Office. Project no. TKP2021-NVA-19 has been implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. Funding text 2: Endre-Zsolt Kedves is very grateful for NTP-NFTÖ scholarship (NTP-NFTÖ-21-B-0284). ZsP and AS gratefully acknowledges the support of the Bolyai Janos Research Fellowship of the Hungarian Academy of Science and the “UNKP-21-5-SZTE-586” and “UNKP-21-5- SZTE- 575” New National Excellence Program as well as the funding provided by the Indo-Hungarian TÉT project (2019-2.1.13-TÉT_IN-2020-00015) of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. The Ministry of Human Capacities through the EFOP-3.6.1-16-2016-00014 project and the 20391-3/2018/FEKUSTRAT are acknowledged. ZK is grateful for K_21 138714 and SNN_135918 project for the Hungarian National Research, Development and Innovation Office. Project no. TKP2021-NVA-19 has been implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. AB - MoO3 is an intensively researched metal oxide, and it is considered a promising visible light driven photocatalyst and an excellent adsorbent of cationic dyes. In the present work orthorhombic α-MoO3 was obtained via calcination of ammonium heptamolybdate where structural modifications were induced by changing the applied calcination temperature (400–750 °C). Further subtle structural (crystallographic plane ratio) and morphological modifications were achieved via hydrothermal recrystallization. Differences between samples were clearly evidenced by various characterization techniques, especially in the case of the crystalline facet ratio and the morphology. The differently structured α-MoO3 samples were investigated as an inhibitor for Fenton reactions where the organic compounds decomposition relies on the generation of [rad]OH radicals. It was found that α-MoO3 strongly inhibits the rate of methyl orange (MO) decolorization. This might imply that MoO3 could be a [rad]OH radical scavenger since Fenton reactions’ effectivity relies on the presence of [rad]OH and [rad]O2 – radicals. We demonstrated that the inhibition efficiency of α-MoO3 correlates strongly with the acidification rate of the aqueous solution in the presence of α-MoO3. However, this pH decline was consistent with crystalline facet ratio within a sample series, while the recrystallized samples disprove this structural connection showing a more complex relationship between the structural characteristics of α-MoO3 and its inhibitive properties of Fenton reactions. The present work pointed out that MoO3 can inhibit reactions which are based on intensive OH radical generation processes such as photocatalysis. © 2023 LA - English DB - MTMT ER - TY - JOUR AU - Benkó, Timea AU - Shen, S. AU - Németh, Miklós László AU - Su, J. AU - Szamosvölgyi, Ákos AU - Kovács, Zoltán AU - Sáfrán, György AU - Al-Zuraiji, S.M. AU - Horváth, Zsolt Endre AU - Sápi, András AU - Kónya, Zoltán AU - Pap, József Sándor TI - BiVO4 charge transfer control by a water-insoluble iron complex for solar water oxidation JF - APPLIED CATALYSIS A-GENERAL J2 - APPL CATAL A-GEN VL - 652 PY - 2023 PG - 15 SN - 0926-860X DO - 10.1016/j.apcata.2023.119035 UR - https://m2.mtmt.hu/api/publication/33628408 ID - 33628408 LA - English DB - MTMT ER - TY - JOUR AU - Shah Abedi, Mahsa AU - Szamosvölgyi, Ákos AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Gyulavári, Tamás AU - Pap, Zsolt TI - Influence of Rapid Heat Treatment on the Photocatalytic Activity and Stability of Strontium Titanates against a Broad Range of Pollutants JF - CATALYSTS J2 - CATALYSTS VL - 13 PY - 2023 IS - 2 PG - 13 SN - 2073-4344 DO - 10.3390/catal13020219 UR - https://m2.mtmt.hu/api/publication/33573030 ID - 33573030 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Yadav, Mohit AU - Szenti, Imre AU - Ábel, Marietta AU - Szamosvölgyi, Ákos AU - Baán, Kornélia AU - Kiss, János AU - Pap, Zsolt AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Concentrated Platinum‐Gallium Nanoalloy for Hydrogen Production from the Catalytic Steam Reforming of Ethanol JF - CHEMCATCHEM J2 - CHEMCATCHEM VL - 15 PY - 2023 IS - 1 PG - 11 SN - 1867-3880 DO - 10.1002/cctc.202200717 UR - https://m2.mtmt.hu/api/publication/33264227 ID - 33264227 LA - English DB - MTMT ER -