@article{MTMT:34823133,
	title = {Enhanced Photocatalytic and Filtration Performance of TiO2-Ag Composite-Coated Membrane Used for the Separation of Oil Emulsions},
	url = {https://m2.mtmt.hu/api/publication/34823133},
	author = {Fazekas, Ákos Ferenc and Gyulavári, Tamás and Ágoston, Áron and Janovák, László and Heszlerné Kopniczky, Judit and László, Zsuzsanna and Veréb, Gábor},
	doi = {10.3390/separations11040112},
	journal-iso = {SEPARATIONS},
	journal = {SEPARATIONS},
	volume = {11},
	unique-id = {34823133},
	issn = {2297-8739},
	abstract = {Polyvinylidene fluoride (PVDF) membranes were coated with TiO2 and TiO2-Ag to enhance their efficiency for oil-in-water emulsion separation. The photocatalytic activities of the two modified membranes and their filtration performances were compared in detail. The significantly enhanced photocatalytic activity of the TiO2-Ag composite was proved using a methyl orange (MO) solution (c = 10−5 M) and a crude oil emulsion (c = 50 mg·L−1). The TiO2-Ag-coated membrane reduced the MO concentration by 87%, whereas the TiO2-modified membrane reached only a 46% decomposition. The photocatalytic reduction in the chemical oxygen demand of the emulsion was also ~50% higher using the TiO2-Ag-coated membrane compared to that of the TiO2-coated membrane. The photoluminescence measurements demonstrated a reduced electron/hole recombination, achieved by the Ag nanoparticle addition (TiO2-Ag), which also explained the enhanced photocatalytic activity. A significant improvement in the oil separation performance with the TiO2-Ag-coated membrane was also demonstrated: a substantial increase in the flux and flux recovery ratio (up to 92.4%) was achieved, together with a notable reduction in the flux decay ratio and the irreversible filtration resistance. Furthermore, the purification efficiency was also enhanced (achieving 98.5% and 99.9% COD and turbidity reductions, respectively). Contact angle, zeta potential, scanning electron microscopy (SEM), and atomic force microscopy (AFM) measurements were carried out to explain the results. SEM and AFM images revealed that on the TiO2-Ag-coated membrane, a less aggregated, more continuous, homogeneous, and smoother nanolayer was formed due to the ~50% more negative zeta potential of the TiO2-Ag nanocomposite compared to that of the TiO2. In summary, via Ag addition, a sufficiently hydrophilic, beneficially negatively charged, and homogeneous TiO2-Ag-coated PVDF membrane surface was achieved, which resulted in the presented advantageous filtration properties beyond the photocatalytic activity enhancement.},
	year = {2024},
	eissn = {2297-8739},
	pages = {112},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Janovák, László/0000-0002-2066-319X; Veréb, Gábor/0000-0001-9642-1851}
}

@article{MTMT:34513997,
	title = {Photocatalytic and surface properties of titanium dioxide nanoparticles in soil solutions},
	url = {https://m2.mtmt.hu/api/publication/34513997},
	author = {Solymos, Karolina and Babcsányi, Izabella and Ariya, Badam and Gyulavári, Tamás and Ágoston, Áron and Szamosvölgyi, Ákos and Kukovecz, Ákos and Kónya, Zoltán and Farsang, Andrea and Pap, Zsolt},
	doi = {10.1039/D3EN00622K},
	journal-iso = {ENVIRON SCI-NANO},
	journal = {ENVIRONMENTAL SCIENCE-NANO},
	volume = {11},
	unique-id = {34513997},
	issn = {2051-8153},
	abstract = {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...},
	year = {2024},
	eissn = {2051-8161},
	pages = {1204-1216},
	orcid-numbers = {Babcsányi, Izabella/0000-0003-0581-6343; Gyulavári, Tamás/0000-0001-6103-6689; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596; Farsang, Andrea/0000-0002-7873-5256; Pap, Zsolt/0000-0002-8049-0809}
}

@misc{MTMT:34409056,
	title = {Titanium dioxide hollow spheres for water treatment utilizing enhanced light trapping capability},
	url = {https://m2.mtmt.hu/api/publication/34409056},
	author = {Gyulavári, Tamás and Kata, Kovács and Zoltán, Kovács and Veréb, Gábor and Hernádi, Klára and Pap, Zsolt},
	unique-id = {34409056},
	year = {2023},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Veréb, Gábor/0000-0001-9642-1851; Hernádi, Klára/0000-0001-9419-689X; Pap, Zsolt/0000-0002-8049-0809}
}

@CONFERENCE{MTMT:34409051,
	title = {Gyorskalcinálással előállított kalcium-titanátok fotokatalitikus aktivitásának és stabilitásának vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/34409051},
	author = {Gyulavári, Tamás and Shah Abedi, Mahsa and Kukovecz, Ákos and Kónya, Zoltán and Pap, Zsolt},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34409051},
	year = {2023},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596; Pap, Zsolt/0000-0002-8049-0809}
}

@CONFERENCE{MTMT:34407490,
	title = {Development of TiO2 and TiO2/CNT nanocomposite blended and grafted PVDF membranes used for membrane separation of oil emulsions},
	url = {https://m2.mtmt.hu/api/publication/34407490},
	author = {Miklós, Tímea and Gyulavári, Tamás and Hodúr, Cecilia and Hernádi, Klára and László, Zsuzsanna and Veréb, Gábor},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34407490},
	year = {2023},
	pages = {1-1},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Hodúr, Cecilia/0000-0002-2028-6304; Hernádi, Klára/0000-0001-9419-689X; Veréb, Gábor/0000-0001-9642-1851}
}

@CONFERENCE{MTMT:34407456,
	title = {Effects of oil composition and CNT functionalizaton on the membrane filtration of oily wastewaters with TiO2/(f)CNT composite-coated PVDF membranes},
	url = {https://m2.mtmt.hu/api/publication/34407456},
	author = {Fazekas, Ákos Ferenc and Gyulavári, Tamás and Pap, Zsolt and Bodor, Attila and Laczi, Krisztián and Perei, Katalin and Nyergesné Illés, Erzsébet and László, Zsuzsanna and Veréb, Gábor},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34407456},
	year = {2023},
	pages = {1-1},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Laczi, Krisztián/0000-0002-9399-7406; Perei, Katalin/0000-0001-8989-2284; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Veréb, Gábor/0000-0001-9642-1851}
}

@article{MTMT:34395096,
	title = {Noble metal nanoparticles and nanodiamond modified strontium titanate photocatalysts for room temperature CO production from direct hydrogenation of CO2},
	url = {https://m2.mtmt.hu/api/publication/34395096},
	author = {Yadav, Mohit and Gyulavári, Tamás and Kiss, János and Ábrahámné, Kornélia B. and Efremova, Anastasiia and Szamosvölgyi, Ákos and Pap, Zsolt and Sápi, András and Kukovecz, Ákos and Kónya, Zoltán},
	doi = {10.1016/j.jcou.2023.102621},
	journal-iso = {J CO2 UTIL},
	journal = {JOURNAL OF CO2 UTILIZATION},
	volume = {78},
	unique-id = {34395096},
	issn = {2212-9820},
	year = {2023},
	eissn = {2212-9839},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Sápi, András/0000-0001-6557-0731; Kukovecz, Ákos/0000-0003-0716-9557; Kónya, Zoltán/0000-0002-9406-8596}
}

@{MTMT:34328535,
	title = {Ammonium removal from aqueous solution in presence of organic compounds, using biochar from banana leaves. Competitive isotherms models},
	url = {https://m2.mtmt.hu/api/publication/34328535},
	author = {Pantoja Alvarez, Fernanda Liceth and Beszédes, Sándor and Gyulavári, Tamás and Nyergesné Illés, Erzsébet and Kozma, Gábor and Sápi, András and László, Zsuzsanna},
	booktitle = {Proceedings of the 29th International Symposium on Analytical and Environmental Problems},
	unique-id = {34328535},
	year = {2023},
	pages = {46-46},
	orcid-numbers = {Beszédes, Sándor/0000-0003-2301-765X; Gyulavári, Tamás/0000-0001-6103-6689; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Kozma, Gábor/0000-0003-2033-0720; Sápi, András/0000-0001-6557-0731}
}

@{MTMT:34191007,
	title = {Binary Adsorption by Bio-Adsorbents},
	url = {https://m2.mtmt.hu/api/publication/34191007},
	author = {Sukmana, Hadid and Ballai, Gergő and Gyulavári, Tamás and Nyergesné Illés, Erzsébet and Kozma, Gábor and Kónya, Zoltán and Hodúr, Cecilia},
	booktitle = {BOOK OF ABSTRACTS VIII INTERNATIONAL CONFERENCE SUSTAINABLE POSTHARVEST AND FOOD TECHNOLOGIES AND XXXV SCIENTIFIC - PROFESSIONAL CONFERENCE PROCESSING AND ENERGY IN AGRICULTURE},
	unique-id = {34191007},
	year = {2023},
	pages = {130},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Kozma, Gábor/0000-0003-2033-0720; Kónya, Zoltán/0000-0002-9406-8596; Hodúr, Cecilia/0000-0002-2028-6304}
}

@article{MTMT:34166716,
	title = {Effects of Different TiO2/CNT Coatings of PVDF Membranes on the Filtration of Oil-Contaminated Wastewaters},
	url = {https://m2.mtmt.hu/api/publication/34166716},
	author = {Fazekas, Ákos Ferenc and Gyulavári, Tamás and Pap, Zsolt and Bodor, Attila and Laczi, Krisztián and Perei, Katalin and Nyergesné Illés, Erzsébet and László, Zsuzsanna and Veréb, Gábor},
	doi = {10.3390/membranes13100812},
	journal-iso = {MEMBRANES-BASEL},
	journal = {MEMBRANES (BASEL)},
	volume = {13},
	unique-id = {34166716},
	abstract = {Six different TiO2/CNT nanocomposite-coated polyvinylidene-fluoride (PVDF) microfilter membranes (including –OH or/and –COOH functionalized CNTs) were evaluated in terms of their performance in filtering oil-in-water emulsions. In the early stages of filtration, until reaching a volume reduction ratio (VRR) of ~1.5, the membranes coated with functionalized CNT-containing composites provided significantly higher fluxes than the non-functionalized ones, proving the beneficial effect of the surface modifications of the CNTs. Additionally, until the end of the filtration experiments (VRR = 5), notable flux enhancements were achieved with both TiO2 (~50%) and TiO2/CNT-coated membranes (up to ~300%), compared to the uncoated membrane. The irreversible filtration resistances of the membranes indicated that both the hydrophilicity and surface charge (zeta potential) played a crucial role in membrane fouling. However, a sharp and significant flux decrease (~90% flux reduction ratio) was observed for all membranes until reaching a VRR of 1.1–1.8, which could be attributed to the chemical composition of the oil. Gas chromatography measurements revealed a lack of hydrocarbon derivatives with polar molecular fractions (which can act as natural emulsifiers), resulting in significant coalescent ability (and less stable emulsion). Therefore, this led to a more compact cake layer formation on the surface of the membranes (compared to a previous study). It was also demonstrated that all membranes had excellent purification efficiency (97–99.8%) regarding the turbidity, but the effectiveness of the chemical oxygen demand reduction was slightly lower, ranging from 93.7% to 98%.},
	year = {2023},
	eissn = {2077-0375},
	orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Pap, Zsolt/0000-0002-8049-0809; Laczi, Krisztián/0000-0002-9399-7406; Perei, Katalin/0000-0001-8989-2284; Nyergesné Illés, Erzsébet/0000-0002-2901-9616; Veréb, Gábor/0000-0001-9642-1851}
}