TY - JOUR AU - Kőrösi, László Tamás AU - Bognár, Balázs AU - Horváth, Marianna AU - Schneider, György AU - Kovács, János AU - Scarpellini, Alice AU - Castelli, Andrea AU - Colombo, Massimo AU - Prato, Mirko TI - Hydrothermal evolution of PF-co-doped TiO2 nanoparticles and their antibacterial activity against carbapenem-resistant Klebsiella pneumoniae JF - APPLIED CATALYSIS B-ENVIRONMENTAL J2 - APPL CATAL B-ENVIRON VL - 231 PY - 2018 SP - 115 EP - 122 PG - 8 SN - 0926-3373 DO - 10.1016/j.apcatb.2018.03.012 UR - https://m2.mtmt.hu/api/publication/3343546 ID - 3343546 N1 - Research Institute for Viticultureand Oenology, University of Pécs, Pázmány Péter u. 4, Pécs, H-7634, Hungary Institute of Organic and MedicinalChemistry, University of Pécs, Szigeti st. 12, Pécs, H-7624, Hungary Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Szigeti st. 12, Pécs, H-7624, Hungary Environmental Analytical and Geoanalytical Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság u. 20, Pécs, H-7624, Hungary Electron Microscopy Facility, Istituto Italiano di Tecnologia, via Morego 30, Genova, 16163, Italy Department of Nanochemistry, Istituto Italiano di Tecnologia, via Morego 30, Genova, 16163, Italy Materials Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, Genova, 16163, Italy Cited By :27 Export Date: 18 September 2023 CODEN: ACBEE Correspondence Address: Kőrösi, L.; Research Institute for Viticultureand Oenology, Pázmány Péter u. 4, Hungary; email: korosi.laszlo@pte.hu LA - English DB - MTMT ER - TY - JOUR AU - Veréb, Gábor AU - Manczinger, László AU - Oszkó, Albert Zoltán AU - Sienkiewicz, A AU - Forró, L AU - Mogyorósi, Károly AU - Dombi, András AU - Hernádi, Klára TI - Highly efficient bacteria inactivation and phenol degradation by visible light irradiated iodine doped TiO2 JF - APPLIED CATALYSIS B-ENVIRONMENTAL J2 - APPL CATAL B-ENVIRON VL - 129 PY - 2013 SP - 194 EP - 201 PG - 8 SN - 0926-3373 DO - 10.1016/j.apcatb.2012.08.037 UR - https://m2.mtmt.hu/api/publication/2171476 ID - 2171476 AB - In this study visible light active iodine doped titanium dioxide samples prepared by sol-gel method were investigated. Photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray fluorescence spectroscopy (XFS), diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and by Brunauer-Emmett-Teller (BET) surface area technique.Different iodine/titanium ratios (nI/nTi=0.0-2.6) were applied during the synthesis and the optimum value was determined by phenol degradation under UV and VIS irradiations. The photocatalytic efficiency towards phenol degradation and the inactivation of Escherichia coli (E. coli) contaminated water under visible light illumination (conventional 24W energy-saving compact fluorescence lamps) of the most active iodine-doped TiO2 (nI/nTi=0.5; 79.5m2/g; 98wt% anatase) was compared with well known reference photocatalysts, that are Aeroxide P25 and Aldrich anatase (>85nm primary crystallite size). Results showed that our iodine doped TiO2 was far more efficient at inactivating the E. coli and decomposing the phenol than Aeroxide P25. Electron spin resonance (ESR) measurements confirmed the formation of highly reactive OH radicals by the iodine doped titania under VIS irradiation. In contrast, singlet oxygen and superoxide radical ions were not detected. The performed experiments also proved that dissolved iodine was produced in very low concentrations (about 0.01-0.025mg/L) from the irradiated titanium dioxide. The dissolved iodine could have some contribution to the phenol oxidation and the disinfection effects. This study demonstrated this property of iodine-doped titanias for the first time. © 2012 Elsevier B.V. LA - English DB - MTMT ER - TY - JOUR AU - Wu, MC AU - Toth, G AU - Sápi, András AU - Leino, AR AU - Kónya, Zoltán AU - Kukovecz, Ákos AU - Su, WF AU - Kordás, Krisztián TI - Synthesis and Photocatalytic Performance of Titanium Dioxide Nanofibers and the Fabrication of Flexible Composite Films from Nanofibers JF - JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY J2 - J NANOSCI NANOTECHNO VL - 12 PY - 2012 IS - 2 SP - 1421 EP - 1424 PG - 4 SN - 1533-4880 DO - 10.1166/jnn.2012.4655 UR - https://m2.mtmt.hu/api/publication/1992105 ID - 1992105 N1 - International Conference on Electronic Materials (IUMRS-ICEM) AUG 22-27, 2010. Seoul, SOUTH KOREA. WC: Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials : Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter AB - Titanium dioxide nanofibers were synthesized and applied in flexible composite films that are easy to handle and recycle after use. The nanofibers were obtained in a multi-step procedure. First, sodium titanate nanofibers were prepared from TiO2 nanoparticles through the alkali hydrothermal method. In the next step, sodium hydrogen titanate nanofibers were made by washing the sodium titanate nanofibers in HCI solution. Finally, the sodium hydrogen titanate nanofibers were transformed to TiO2 anatase nanofibers by calcination in air. The photocatalytic activity of TiO2 anatase nanofibers were evaluated and compared to a TiO2 nanoparticle catalyst by decomposing methyl orange dye in aqueous solutions. The achieved reaction rate constant of TiO2 anatase nanofibers was comparable to that of Degussa P25. Paper-like flexible composite films were prepared by co-filtrating aqueous dispersions of TiO2 catalyst materials and cellulose. The composite films made from the nanofibers exhibit better mechanical integrity than those of the nanoparticle-cellulose composites. LA - English DB - MTMT ER - TY - JOUR AU - Wu, MC AU - Sápi, András AU - Avila, A AU - Szabó, Mária AU - Hiltunen, J AU - Huuhtanen, M AU - Toth, G AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Keiski, R AU - Su, WF AU - Jantunen, H AU - Kordás, Krisztián TI - Enhanced photocatalytic activity of TiO2 nanofibers and their flexible composite films: Decomposition of organic dyes and efficient H2 generation from ethanol-water mixtures JF - NANO RESEARCH J2 - NANO RES VL - 4 PY - 2011 IS - 4 SP - 360 EP - 369 PG - 10 SN - 1998-0124 DO - 10.1007/s12274-010-0090-9 UR - https://m2.mtmt.hu/api/publication/1510157 ID - 1510157 AB - TiO2 nanofibers decorated with Pt and Pd nanoparticles have been synthesized and studied in various photocatalytic processes. Excellent photocatalytic behavior in the decomposition of organic dyes in water, degradation of organic stains on the surface of flexible freestanding cellulose/catalyst composite films and in generation of hydrogen from ethanol using both suspended and immobilized catalysts are demonstrated. The performance of the nanofiber-based TiO2 materials is competitive with-and in some cases outperforms-their conventional nanoparticle-based counterparts. In all cases, Pd-decorated TiO2 nanoparticles and nanofibers proved to be more efficient than their Pt-based counterparts, which could be explained on the basis of the formation of nano-sized Schottky interfaces at the contacts between TiO2 and metal nanoparticles. The feasibility of forming cellulose/catalyst composites provides a novel way of utilizing photocatalyst materials in large-area coatings and freestanding films. LA - English DB - MTMT ER - TY - JOUR AU - Wu, MC AU - Hiltunen, J AU - Sápi, András AU - Avila, A AU - Larsson, W AU - Liao, HC AU - Huuhtanen, M AU - Toth, G AU - Shchukarev, A AU - Laufer, N AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Mikkola, JP AU - Keiski, R AU - Su, WF AU - Chen, YF AU - Jantunen, H AU - Ajayan, PM AU - Vajtai, R AU - Kordás, Krisztián TI - Nitrogen-Doped Anatase Nanofibers Decorated with Noble Metal Nanoparticles for Photocatalytic Production of Hydrogen JF - ACS NANO J2 - ACS NANO VL - 5 PY - 2011 IS - 6 SP - 5025 EP - 5030 PG - 6 SN - 1936-0851 DO - 10.1021/nn201111j UR - https://m2.mtmt.hu/api/publication/1626741 ID - 1626741 LA - English DB - MTMT ER -