Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water
For the very first time, the effect of frequency on the piezocatalytic degradation of dyes has been systematically evaluated. To achieve this, a combination of systems and experimental setups operating at different ultrasonic frequencies ranging from 20 kHz up to 1 MHz were used. In addition, the ef...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821123000340 |
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| author | Franziska Bößl Valentin C. Menzel Efthalia Chatzisymeon Tim P. Comyn Peter Cowin Andrew J. Cobley Ignacio Tudela |
| author_facet | Franziska Bößl Valentin C. Menzel Efthalia Chatzisymeon Tim P. Comyn Peter Cowin Andrew J. Cobley Ignacio Tudela |
| author_sort | Franziska Bößl |
| collection | DOAJ |
| description | For the very first time, the effect of frequency on the piezocatalytic degradation of dyes has been systematically evaluated. To achieve this, a combination of systems and experimental setups operating at different ultrasonic frequencies ranging from 20 kHz up to 1 MHz were used. In addition, the effect of ultrasonic power was investigated at a low ultrasonic frequency of 20 kHz and higher ultrasonic frequency of 576 kHz to shed more light into the controversial discussion surrounding the ‘true’ mechanisms behind piezocatalysis. The results revealed that mechanical effects derived from acoustic cavitation, predominant at lower ultrasonic frequencies (<100 kHz), indeed enhanced the piezocatalytic degradation of the dye, Rhodamine B, to some extent (from 53% to 64% RhB degradation after 2 h). However, it was again demonstrated that sonochemical production of radicals remains a significant contributor for the overall degradation of the dye. Moreover, at higher ultrasonic frequencies (>100 kHz), the chemical effects derived from acoustic cavitation were so remarkable, that it raised the question of whether a piezocatalyst is really necessary when the optimisation of frequency and power may be enough for sonochemistry to fully degrade organic pollutants at a fast rate (pseudo first-order degradation reaction rate constant up to 0.037 min−1). |
| first_indexed | 2024-04-09T14:12:15Z |
| format | Article |
| id | doaj.art-afcb9dc6acc3470cb601649af2fd4f03 |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-09T14:12:15Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-afcb9dc6acc3470cb601649af2fd4f032023-05-06T04:39:15ZengElsevierChemical Engineering Journal Advances2666-82112023-05-0114100477Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in waterFranziska Bößl0Valentin C. Menzel1Efthalia Chatzisymeon2Tim P. Comyn3Peter Cowin4Andrew J. Cobley5Ignacio Tudela6School of Engineering, Institute for Materials and Processes, Edinburgh Electrochemical Engineering Group (e3 Group), The University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh, EH9 3FB, United Kingdom; Corresponding author.School of Engineering, Institute for Materials and Processes, Edinburgh Electrochemical Engineering Group (e3 Group), The University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh, EH9 3FB, United KingdomSchool of Engineering, Institute for Infrastructure and Environment, The University of Edinburgh, William Rankine Building, Thomas Bayes Road, Edinburgh, EH9 3JL, United KingdomIonix Advanced Technologies Ltd., 3M Buckley Innovation Centre, Firth Street, Huddersfield, HD1 3BD, United KingdomIonix Advanced Technologies Ltd., 3M Buckley Innovation Centre, Firth Street, Huddersfield, HD1 3BD, United KingdomFunctional Materials and Chemistry Research Group, Research Centre for Manufacturing and Materials, Institute of Clean Growth and Future Mobility, Coventry University, Beresford Avenue, Coventry, CV6 5LZ, United KingdomSchool of Engineering, Institute for Materials and Processes, Edinburgh Electrochemical Engineering Group (e3 Group), The University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh, EH9 3FB, United Kingdom; Corresponding author.For the very first time, the effect of frequency on the piezocatalytic degradation of dyes has been systematically evaluated. To achieve this, a combination of systems and experimental setups operating at different ultrasonic frequencies ranging from 20 kHz up to 1 MHz were used. In addition, the effect of ultrasonic power was investigated at a low ultrasonic frequency of 20 kHz and higher ultrasonic frequency of 576 kHz to shed more light into the controversial discussion surrounding the ‘true’ mechanisms behind piezocatalysis. The results revealed that mechanical effects derived from acoustic cavitation, predominant at lower ultrasonic frequencies (<100 kHz), indeed enhanced the piezocatalytic degradation of the dye, Rhodamine B, to some extent (from 53% to 64% RhB degradation after 2 h). However, it was again demonstrated that sonochemical production of radicals remains a significant contributor for the overall degradation of the dye. Moreover, at higher ultrasonic frequencies (>100 kHz), the chemical effects derived from acoustic cavitation were so remarkable, that it raised the question of whether a piezocatalyst is really necessary when the optimisation of frequency and power may be enough for sonochemistry to fully degrade organic pollutants at a fast rate (pseudo first-order degradation reaction rate constant up to 0.037 min−1).http://www.sciencedirect.com/science/article/pii/S2666821123000340PiezocatalysisSonochemistryDye degradationCavitationUltrasonic frequencyUltrasonic power |
| spellingShingle | Franziska Bößl Valentin C. Menzel Efthalia Chatzisymeon Tim P. Comyn Peter Cowin Andrew J. Cobley Ignacio Tudela Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water Chemical Engineering Journal Advances Piezocatalysis Sonochemistry Dye degradation Cavitation Ultrasonic frequency Ultrasonic power |
| title | Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| title_full | Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| title_fullStr | Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| title_full_unstemmed | Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| title_short | Effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| title_sort | effect of frequency and power on the piezocatalytic and sonochemical degradation of dyes in water |
| topic | Piezocatalysis Sonochemistry Dye degradation Cavitation Ultrasonic frequency Ultrasonic power |
| url | http://www.sciencedirect.com/science/article/pii/S2666821123000340 |
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