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Piezo-enhanced photocatalytic diclofenac mineralization over ZnO.

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Title: Piezo-enhanced photocatalytic diclofenac mineralization over ZnO.
Authors: Meroni, Daniela1,2 (AUTHOR) daniela.meroni@unimi.it, Bianchi, Claudia L.1,2 (AUTHOR), Boffito, Daria C.3 (AUTHOR), Cerrato, Giuseppina4 (AUTHOR), Bruni, Anna1 (AUTHOR), Sartirana, Marta1 (AUTHOR), Falletta, Ermelinda1,2,5 (AUTHOR) ermelinda.falletta@unimi.it
Source: Ultrasonics Sonochemistry. Jul2021, Vol. 75, pN.PAG-N.PAG. 1p.
Subjects: Diclofenac, Mineralization, Zinc oxide, Complex matrices, Micropollutants, Water testing, Nanorods
Abstract: • US-assisted photocatalysis by ZnO leads to efficient mineralization of diclofenac. • Synergistic effects are observed only when ZnO nanorods are used. • Tests in simulated water matrix show enhanced performance with respect to TiO 2. • Reaction intermediates of photo- and sonophotocatalysis are identified. The degradation of diclofenac has been realized for the first time by a piezo-enhanced sonophotocatalytic approach based on ZnO. The sonophotocatalytic degradation showed a slight enhancement in the degradation of the parent compound, whereas strong synergistic effects were observed for the mineralization process when suitable ZnO morphologies are used, reaching 70% of complete degradation of 25 ppm diclofenac using 0.1 g/L ZnO in 360 min. Tests in a complex water matrix show enhanced diclofenac removal, outperforming a TiO 2 benchmark photocatalyst. These promising experimental results promote this process as a good alternative to traditional degradation approaches for remediation of real water matrices. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:• US-assisted photocatalysis by ZnO leads to efficient mineralization of diclofenac. • Synergistic effects are observed only when ZnO nanorods are used. • Tests in simulated water matrix show enhanced performance with respect to TiO 2. • Reaction intermediates of photo- and sonophotocatalysis are identified. The degradation of diclofenac has been realized for the first time by a piezo-enhanced sonophotocatalytic approach based on ZnO. The sonophotocatalytic degradation showed a slight enhancement in the degradation of the parent compound, whereas strong synergistic effects were observed for the mineralization process when suitable ZnO morphologies are used, reaching 70% of complete degradation of 25 ppm diclofenac using 0.1 g/L ZnO in 360 min. Tests in a complex water matrix show enhanced diclofenac removal, outperforming a TiO 2 benchmark photocatalyst. These promising experimental results promote this process as a good alternative to traditional degradation approaches for remediation of real water matrices. [ABSTRACT FROM AUTHOR]
ISSN:13504177
DOI:10.1016/j.ultsonch.2021.105615