TY - JOUR AU - Tóth, Zsejke-Réka AU - Hernádi, Klára AU - Baia, Lucian AU - Kovács, Gábor AU - Pap, Zsolt TI - Controlled formation of Ag-AgxO nanoparticles on the surface of commercial TiO2 based composites for enhanced photocatalytic degradation of oxalic acid and phenol JF - CATALYSIS TODAY J2 - CATAL TODAY VL - 424 PY - 2023 PG - 10 SN - 0920-5861 DO - 10.1016/j.cattod.2020.06.051 UR - https://m2.mtmt.hu/api/publication/31395790 ID - 31395790 AB - It is widely accepted that the photocatalytic efficiency of TiO2 can be enhanced by modifying its surface with noble metal nanoparticles, such as Ag. On the surface of TiO2, Ag nanoparticles are exposed to rapid oxidation, resulting AgxO. Therefore, in the present work, the photocatalytic activities of TiO2 composites Ag nanoparticles were investigated. They consisted of commercial titanium dioxide mixtures (Aldrich anatase and rutile) in well-defined ratios and Ag nanoparticles, which were deposited on the surface of titania, with or without using a reducing agent. The transformation of Ag nanoparticles into AgO was monitored considering the anatase/rutile ratio of the reference catalyst(s). The effect of transformation on the photocatalytic activity of commercial TiO2 was also studied via the degradation of phenol and oxalic acid under UV light irradiation. It was concluded that the Ag nanoparticles deposited on the surface of rutile could increase the efficiency of charge separation. In the case of anatase, similar results were obtained for the as-formed amorphous AgO nanoparticles. The tertiary and quaternary composites generally exhibited higher photocatalytic efficiencies towards oxalic acid degradation than the corresponding commercial TiO2 mixtures. Ag nanoparticles were found to be unstable during the experiments as they transformed into Ag2O, which could transform back to Ag during the photocatalytic processes, under appropriate conditions. On the other hand, the stability of AgO was not affected during the aging period. Therefore, it was deduced that AgO is more stable on the surface of anatase compared to Ag and Ag2O nanoparticles deposited on the surface of rutile. © 2020 LA - English DB - MTMT ER - TY - JOUR AU - Sisay, Elias Jigar AU - Veréb, Gábor AU - Pap, Zsolt AU - Gyulavári, Tamás AU - Ágoston, Áron AU - Heszlerné Kopniczky, Judit AU - Hodúr, Cecilia AU - Arthanareeswaran, Gangasalam AU - Sivasundari Arumugam, Gokula Krishnan AU - László, Zsuzsanna TI - Visible-light-driven photocatalytic PVDF-TiO2/CNT/BiVO4 hybrid nanocomposite ultrafiltration membrane for dairy wastewater treatment JF - CHEMOSPHERE J2 - CHEMOSPHERE VL - 307 PY - 2022 IS - 1 PG - 8 SN - 0045-6535 DO - 10.1016/j.chemosphere.2022.135589 UR - https://m2.mtmt.hu/api/publication/32949025 ID - 32949025 LA - English DB - MTMT ER - TY - JOUR AU - Szamosvölgyi, Ákos AU - Rajkumar, T. AU - Sápi, András AU - Szenti, Imre AU - Ábel, Marietta AU - Gomez Perez, Juan Fernando AU - Baán, Kornélia AU - Fogarassy, Zsolt AU - Dodony, Erzsébet AU - Pécz, Béla AU - Garg, Seema AU - Kiss, János AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Interfacial Ni active sites strike solid solutional counterpart in CO2 hydrogenation JF - ENVIRONMENTAL TECHNOLOGY & INNOVATION J2 - ENVIRON TECH INNOV VL - 27 PY - 2022 PG - 12 SN - 2352-1864 DO - 10.1016/j.eti.2022.102747 UR - https://m2.mtmt.hu/api/publication/32891371 ID - 32891371 LA - English DB - MTMT ER - TY - CHAP AU - Farsang, Andrea AU - Babcsányi, Izabella AU - Ladányi, Zsuzsanna AU - Perei, Katalin AU - Bodor, Attila AU - Csányi, Katalin AU - Barta, Károly ED - Chenchouni, Haroun ED - Chaminé, Helder I. ED - Khan, Md Firoz ED - Merkel, Broder J. ED - Zhang, Zhihua ED - Li, Peiyue ED - Kallel, Amjad ED - Khélifi, Nabil TI - Sewage Sludge Compost Disposal on a Chernozem Soil: Impacts on Bacterial Activity and Nutrient Contents T2 - New Prospects in Environmental Geosciences and Hydrogeosciences PB - Springer Netherlands CY - Cham SN - 9783030725433 T3 - Advances in Science, Technology & Innovation, ISSN 2522-8714 PY - 2022 SP - 121 EP - 124 PG - 4 DO - 10.1007/978-3-030-72543-3_27 UR - https://m2.mtmt.hu/api/publication/32715732 ID - 32715732 N1 - Department of Physical Geography and Geoinformatics, University of Szeged, Egyetem utca 2-6, Szeged, 6722, Hungary Department of Biotechnology, University of Szeged, Közép fasor, Szeged, 6726, Hungary Institute of Environmental Science and Technology, University of Szeged, Tisza L. krt 132, Szeged, 6720, Hungary Export Date: 16 January 2023 Correspondence Address: Farsang, A.; Department of Physical Geography and Geoinformatics, Egyetem utca 2-6, Hungary; email: farsang@geo.u-szeged.hu LA - English DB - MTMT ER - TY - CHAP AU - Viktória, Márta AU - Mohit, Yadav AU - Kedves, Endre-Zsolt AU - Gyulavári, Tamás AU - Sápi, András AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Pap, Zsolt ED - Alapi, Tünde ED - Berkecz, Róbert ED - Ilisz, István TI - Strontium titanate photocatalysts: preparation, characterization and photocatalytic activity T2 - Proceedings of the 27th International Symposium on Analytical and Environmental Problems PB - University of Szeged CY - Szeged SN - 9789633068359 PY - 2021 SP - 269 EP - 272 PG - 4 UR - https://m2.mtmt.hu/api/publication/32560947 ID - 32560947 LA - English DB - MTMT ER - TY - CONF AU - Mircea-Vasile, Cristea AU - Gyulavári, Tamás AU - Székely, István-Attila AU - Pap, Zsolt TI - Modeling and Optimizing the Photocatalytic Efficiency of Hydrothermally Obtained CaTiO3 via Polynomial Regression and Artificial Neural Network Models T2 - Modeling and Optimizing the Photocatalytic Efficiency of Hydrothermally Obtained CaTiO3 via Polynomial Regression and Artificial Neural Network Models PY - 2021 SP - 34 EP - 35 PG - 2 UR - https://m2.mtmt.hu/api/publication/32560907 ID - 32560907 LA - English DB - MTMT ER - TY - CONF AU - Bíborka, Boga AU - Székely, István-Attila AU - Gyulavári, Tamás AU - Vasile-Mircea, Cristea AU - Pap, Zsolt TI - Synthesis design of CaTiO3 and the assessment of photoreactor design parameters T2 - Synthesis design of CaTiO3 and the assessment of photoreactor design parameters PY - 2021 SP - 211 EP - 212 PG - 2 UR - https://m2.mtmt.hu/api/publication/32560868 ID - 32560868 LA - English DB - MTMT ER - TY - BOOK AU - Bíborka, Boga AU - Székely, István-Attila AU - Gyulavári, Tamás AU - Vasile-Mircea, Cristea AU - Pap, Zsolt TI - Synthesis design of CaTiO3 and the assessment of photoreactor design parameters PY - 2021 UR - https://m2.mtmt.hu/api/publication/32560861 ID - 32560861 LA - English DB - MTMT ER - TY - JOUR AU - Gy. Szerencsés, Szabolcs AU - Beszédes, Sándor AU - László, Zsuzsanna AU - Veréb, Gábor AU - Szegedi, Balázs AU - Hovorkáné Horváth Mária, Zsuzsanna AU - Hodúr, Cecilia AU - Rákhely, Gábor AU - Kertész, Szabolcs TI - Effect of vibration on the efficiency of ultrafiltration JF - ANALECTA TECHNICA SZEGEDINENSIA J2 - REV FAC ENG ANALECTA TECH SZEGED VL - 15 PY - 2021 IS - 1 SP - 37 EP - 44 PG - 8 SN - 1788-6392 DO - 10.14232/analecta.2021.1.37-44 UR - https://m2.mtmt.hu/api/publication/32128966 ID - 32128966 AB - Nowadays, several environmental challenges are present to cope with. One with outstanding importance is the protection of our water supplies, therefore examination of wastewater treatment technology is a priority, especially in the European Union. In this work, the effect of membrane module vibration amplitude on the efficiency of ultrafiltration (UF) was investigated in a vibratory shear enhanced membrane filtration system. Based on the results of model dairy effluent UF and statistical analysis, the maximum vibration level available resulted in the most efficient filtration process, due to the most significant reduction of membrane fouling. From our results it was observed that the permeate fluxes more than doubled, specific energy demand was roughly halved, with almost identical retentions for organic matter, and total filtration resistance was reduced to less than half. Results also showed that setting the optimal operating parameters, an advantageous, efficiency focused, and sustainable wastewater treatment technology can be established. LA - English DB - MTMT ER - TY - THES AU - Lemmer, Balázs TI - Hatékonyságnövelő eljárások alkalmazása mezőgazdasági és élelmiszeripari hulladékok kezelésében és hasznosításában PB - Szegedi Tudományegyetem (SZTE) PY - 2021 DO - 10.14232/phd.10619 UR - https://m2.mtmt.hu/api/publication/32080372 ID - 32080372 LA - Hungarian DB - MTMT ER -