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Solar Photocatalytic Degradation of Sulfamethoxazole by TiO$_{2}$ Modified with Noble Metals

Borowska, Ewa; Gomes, João F.; Martins, Rui C.; Quinta-Ferreira, Rosa M.; Horn, Harald; Gmurek, Marta

Abstract:
Application of solar photocatalysis for water treatment is intensively studied. In this work, we investigated TiO2 modified with platinum (Pt/TiO2) and palladium (Pd/TiO2) using sulfamethoxazole (SMX) as the model contaminant. We considered the following parameters: (i) level of TiO2 modification with Pt/Pd, (ii) initial concentration of photocatalysts, (iii) geographic location where processes were conducted, and (iv) natural water matrix. The catalysts characterized by SEM, EDX, DRS, and XRD techniques showed successful deposition of Pd and Pt atoms on TiO2 surface that enabled light absorption in the visible (Vis) range, and therefore caused efficient SMX removal in all tested conditions. A comparison of the rate constants of SMX degradation in various conditions revealed that modification with Pd gave better results than modification with Pt, which was explained by the better optical properties of Pd/TiO2. The removal of SMX was higher with Pd/TiO2 than with Pt/TiO2, independent of the modification level. In the experiments with the same modification level, similar rate constants were achieved when four times the lower concentra ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000095722
Veröffentlicht am 11.06.2019
Originalveröffentlichung
DOI: 10.3390/catal9060500
Coverbild
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4344
KITopen-ID: 1000095722
Erschienen in Catalysts
Band 9
Heft 6
Seiten Article: 500
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 30.05.2019
Schlagworte photocatalytic oxidation; sulfamethoxazole; titanium dioxide modified with noble metals; transformation products; natural sunlight
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