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Immobilization of photocatalytically active TiO2 nanopowder by high shear granulation

  • Nano-TiO2 powder is known to show high photocatalytic reactivity in the degradation of several organic pollutants. In thiswork, the powderwas fixed on the surface of SiO2 granuleswith the size of several micrometers using a high shear granulation process. Nanozirconia sol was applied as an inorganic binder. When the samples were tempered at 300 °C, they showed high stability in an aqueous solution for several hours. An energy dispersive x-ray spectroscopy (EDX) analysis confirmed that the cores and shells of the granules consisted solely of SiO2 and TiO2 respectively, and that ZrO2 was found throughout the whole granules. Methylene blue (MB) was employed as amodel systemto evaluate the photocatalytic activity of the TiO2 nanopowder and coated granules. Itwas shown that the TiO2-coated granules lead to the degradation ofMB under UV irradiation,whereas no effect was observed in the dark. After the Degradation experiments the granules could be recovered and they remained active forNano-TiO2 powder is known to show high photocatalytic reactivity in the degradation of several organic pollutants. In thiswork, the powderwas fixed on the surface of SiO2 granuleswith the size of several micrometers using a high shear granulation process. Nanozirconia sol was applied as an inorganic binder. When the samples were tempered at 300 °C, they showed high stability in an aqueous solution for several hours. An energy dispersive x-ray spectroscopy (EDX) analysis confirmed that the cores and shells of the granules consisted solely of SiO2 and TiO2 respectively, and that ZrO2 was found throughout the whole granules. Methylene blue (MB) was employed as amodel systemto evaluate the photocatalytic activity of the TiO2 nanopowder and coated granules. Itwas shown that the TiO2-coated granules lead to the degradation ofMB under UV irradiation,whereas no effect was observed in the dark. After the Degradation experiments the granules could be recovered and they remained active for further applications.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Caroline Goedecke, Regine Sojref, Thi Yen Nguyen, Christian Piechotta
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Powder Technology
Jahr der Erstveröffentlichung:2017
Organisationseinheit der BAM:1 Analytische Chemie; Referenzmaterialien
1 Analytische Chemie; Referenzmaterialien / 1.3 Strukturanalytik
1 Analytische Chemie; Referenzmaterialien / 1.8 Umweltanalytik
5 Werkstofftechnik
5 Werkstofftechnik / 5.3 Mechanik der Polymerwerkstoffe
5 Werkstofftechnik / 5.6 Glas
Jahrgang/Band:318
Erste Seite:465
Letzte Seite:470
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:Advanced oxidation; Heterogeneous photocatalysis; Methylene blue; Nanozirconia; Water treatment
Themenfelder/Aktivitätsfelder der BAM:Umwelt
DOI:https://doi.org/10.1016/j.powtec.2017.06.025
URL:http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=WOS:000407183500047
ISSN:0032-5910
ISSN:1873-328X
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:25.08.2017
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:25.08.2017