caa a22 4500 445389044 CHVBK 20180317143040.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11144-010-0271-2 doi (NATIONALLICENCE)springer-10.1007/s11144-010-0271-2 Comparison of the liquid and gas phase photocatalytic activity of flame-synthesized TiO2 catalysts: the role of surface quality [Elektronische Daten] [Nándor Balázs, Attila Gácsi, Attila Pallagi, Károly Mogyorósi, Tünde Alapi, Pál Sipos, András Dombi] A set of flame-hydrolytic TiO2 samples was synthesized. Via systematically increasing the precursor (TiCl4) feeding rate to the flame, nanocrystalline TiO2 specimens with practically identical bulk structural properties (that is: particle size, anatase-to-rutile ratio, specific surface area) were obtained. However, it has been observed that with increasing precursor feed rate, the fraction of the polyhedral particles increased in the products at the expense of the spherical ones. In our previous work, we argued, that faceted particles are superior to spherical ones in phenol decomposition. In this work, the photocatalytic activities of these samples were determined in the gas phase using methanol and acetaldehyde as model compounds and they were compared with those obtained for an aqueous solution containing phenol. The photocatalytic activities were found to vary in parallel in the case of phenol and methanol: they increased with the precursor feed rate (and also with the frequency of the faceted nanocrystals) for both. However, for acetaldehyde, the photocatalytic activity did not change systematically within this series of experiments, and roughly remained constant. Our results indicate that the surface quality of TiO2 is of primary importance in the selectivity of photocatalytic reactions. Akadémiai Kiadó, Budapest, Hungary, 2011 TiO2 nationallicence Heterogeneous photocatalysis nationallicence Gas phase-liquid phase photocatalytic activity nationallicence Surface quality nationallicence Balázs Nándor Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut Gácsi Attila Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut Pallagi Attila Department of Inorganic and Analytical Chemistry, University of Szeged, P.O. Box 440, 6701, Szeged, Hungary aut Mogyorósi Károly Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut Alapi Tünde Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut Sipos Pál Department of Inorganic and Analytical Chemistry, University of Szeged, P.O. Box 440, 6701, Szeged, Hungary aut Dombi András Institute of Material Science and Engineering, University of Szeged, P.O. Box 428, 6701, Szeged, Hungary aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/2(2011-04-01), 283-294 1878-5190 102:2<283 2011 102 11144 https://doi.org/10.1007/s11144-010-0271-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-010-0271-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Balázs Nándor Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut NATIONALLICENCE 700 1- Gácsi Attila Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut NATIONALLICENCE 700 1- Pallagi Attila Department of Inorganic and Analytical Chemistry, University of Szeged, P.O. Box 440, 6701, Szeged, Hungary aut NATIONALLICENCE 700 1- Mogyorósi Károly Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut NATIONALLICENCE 700 1- Alapi Tünde Research Group of Environmental Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary aut NATIONALLICENCE 700 1- Sipos Pál Department of Inorganic and Analytical Chemistry, University of Szeged, P.O. Box 440, 6701, Szeged, Hungary aut NATIONALLICENCE 700 1- Dombi András Institute of Material Science and Engineering, University of Szeged, P.O. Box 428, 6701, Szeged, Hungary aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/2(2011-04-01), 283-294 1878-5190 102:2<283 2011 102 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer