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Fernandez Rivas D, Cintas P, Glassey J, Boffito DC. Ultrasound and sonochemistry enhance education outcomes: From fundamentals and applied research to entrepreneurial potential. ULTRASONICS SONOCHEMISTRY 2024; 103:106795. [PMID: 38359576 PMCID: PMC10879001 DOI: 10.1016/j.ultsonch.2024.106795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 01/23/2024] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
With this manuscript we aim to initiate a discussion specific to educational actions around ultrasonics sonochemistry. The importance of these actions does not just derive from a mere pedagogical significance, but they can be an exceptional tool for illustrating various concepts in other disciplines, such as process intensification and microfluidics. Sonochemistry is currently a far-reaching discipline extending across different scales of applicability, from the fundamental physics of tiny bubbles and molecules, up to process plants. This review is part of a special issue in Ultrasonics Sonochemistry, where several scholars have shared their experiences and highlighted opportunities regarding ultrasound as an education tool. The main outcome of our work is that teaching and mentorship in sonochemistry are highly needed, with a balanced technical and scientific knowledge to foster skills and implement safe protocols. Applied research typically features the use of ultrasound as ancillary, to merely enhance a given process and often leading to poorly conceived experiments and misunderstanding of the actual effects. Thus, our scientific community must build a consistent culture and monitor reproducible practices to rigorously generate new knowledge on sonochemistry. These practices can be implemented in teaching sonochemistry in classrooms and research laboratories. We highlight ways to collectively provide a potentially better training for scientists, invigorating academic and industry-oriented careers. A salient benefit for education efforts is that sonochemistry-based projects can serve multidisciplinary training, potentially gathering students from different disciplines, such as physics, chemistry and bioengineering. Herein, we discuss challenges, opportunities, and future avenues to assist in designing courses and research programs based on sonochemistry. Additionally, we suggest simple experiments suitable for teaching basic physicochemical principles at the undergraduatelevel. We also provide arguments and recommendations oriented towards graduate and postdoctoral students, in academia or industry to be more entrepreneurial. We have identified that sonochemistry is consistently seen as a 'green' or sustainable tool, which particular appeal to process intensification approaches, including microfluidics and materials science. We conclude that a globally aligned pedagogical initiative and constantly updated educational tools will help to sustain a virtuous cycle in STEM and industrial applications of sonochemistry.
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Affiliation(s)
- David Fernandez Rivas
- Mesoscale Chemical Systems Group, MESA+ Institute and Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
| | - Pedro Cintas
- Departamento de Química Orgánica e Inorgánica, and IACYS-Green Chemistry & Sustainable Development Unit, Facultad de Ciencias-UEx, 06006 Badajoz, Spain
| | - Jarka Glassey
- School of Engineering, Merz Court, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Daria C Boffito
- Department of Chemical Engineering, Engineering Process Intensification and Catalysis (EPIC), Polytechnique Montréal, C.P. 6079, Succ. "CV", Montréal H3C 3A7, Québec, Canada; Canada Research Chair in Engineering Process Intensification and Catalysis (EPIC), Polytechnique Montréal, C.P. 6079, Succ. "CV", Montréal H3C 3A7, Québec, Canada
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Pappaterra M, Xu P, van der Meer W, Faria JA, Fernandez Rivas D. Cavitation intensifying bags improve ultrasonic advanced oxidation with Pd/Al 2O 3 catalyst. ULTRASONICS SONOCHEMISTRY 2021; 70:105324. [PMID: 32947211 PMCID: PMC7786540 DOI: 10.1016/j.ultsonch.2020.105324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
Advanced oxidation processes can potentially eliminate organic contaminants from industrial waste streams as well as persistent pharmaceutical components in drinking water. We explore for the first time the utilization of Cavitation Intensifying Bags (CIB) in combination with Pd/Al2O3 catalyst as possible advanced oxidation technology for wastewater streams, oxidizing terephthalic acid (TA) to 2-hydroxyterephthalic acid (HTA). The detailed characterization of this novel reaction system reveals that, during sonication, the presence of surface pits of the CIB improves the reproducibility and thus the control of the sonication process, when compared to oxidation in non-pitted bags. Detailed reaction kinetics shows that in the CIB reactor the reaction order to TA is zero, which is attributed to the large excess of TA in the system. The rate of HTA formation increased ten-fold from ~0.01 μM*min-1 during sonication in the CIB, to ~0.10 μM*min-1 for CIB in the presence of the Pd/Al2O3 catalyst. This enhancement was ascribed to a combination of improved mass transport, the creation of thermal gradients, and Pd/Al2O3 catalyst near the cavitating bubbles. Further analysis of the kinetics of HTA formation on Pd/Al2O3 indicated that initially the reaction underwent through an induction period of 20 min, where the HTA concentration was ~0.3 μM. After this, the reaction rate increased reaching HTA concentrations ~6 μM after 40 min. This behavior resembled that observed during oxidation of hydrocarbons on metal catalysts, where the slow rate formation of hydroperoxides on the metal surface is followed by rapid product formation upon reaching a critical concentration. Finally, a global analysis using the Intensification Factor (IF) reveals that CIB in combination with the Pd/Al2O3 catalyst is a desirable option for the oxidation of TA when considering increased oxidation rates and costs.
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Affiliation(s)
- Maria Pappaterra
- Mesoscale Chemical Systems Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, and University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands; Delft University of Technology, Delft, The Netherlands
| | - Pengyu Xu
- Catalytic Processes and Materials Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Walter van der Meer
- Oasen Water Company, PO BOX 122, 2800 AC Gouda, The Netherlands; Membranes Science and Technology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jimmy A Faria
- Catalytic Processes and Materials Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
| | - David Fernandez Rivas
- Mesoscale Chemical Systems Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, and University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
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Ferreira DF, Barin JS, Binello A, Veselov VV, Cravotto G. Highly efficient pumpkin-seed extraction with the simultaneous recovery of lipophilic and hydrophilic compounds. FOOD AND BIOPRODUCTS PROCESSING 2019. [DOI: 10.1016/j.fbp.2019.07.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Navarro-Brull FJ, Teixeira AR, Giri G, Gómez R. Enabling low power acoustics for capillary sonoreactors. ULTRASONICS SONOCHEMISTRY 2019; 56:105-113. [PMID: 31101244 DOI: 10.1016/j.ultsonch.2019.03.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
Capillary reactors demonstrate outstanding potential for on-demand flow chemistry applications. However, non-uniform distribution of multiphase flows, poor solid handling, and the risk of clogging limit their usability for continuous manufacturing. While ultrasonic irradiation has been traditionally applied to address some of these limitations, their acoustic efficiency, uniformity and scalability to larger reactor systems are often disregarded. In this work, high-speed microscopic imaging reveals how cavitation-free ultrasound can unclog and prevent the blockage of capillary reactors. Modeling techniques are then adapted from traditional acoustic designs and applied to simulate and prototype sonoreactors with wider and more uniform sonication areas. Blade-, block- and cylindrical shape sonotrodes are optimized to accommodate longer capillary lengths in sonoreactors resonating at 28 kHz. Finally, a novel helicoidal capillary sonoreactor is proposed to potentially deal with a high concentration of solid particles in miniaturized flow chemistry. The acoustic designs and first principle rationalization presented here offer a transformative step forward in the scale-up of efficient capillary sonoreactors.
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Affiliation(s)
- Francisco J Navarro-Brull
- Institut Universitari d'Electroquímica i Departament de Química Física, Universitat d'Alacant, Apartat 99, E-03080 Alicante, Spain
| | - Andrew R Teixeira
- Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States
| | - Gaurav Giri
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, United States
| | - Roberto Gómez
- Institut Universitari d'Electroquímica i Departament de Química Física, Universitat d'Alacant, Apartat 99, E-03080 Alicante, Spain.
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Afreen S, Muthoosamy K, Manickam S. Sono-nano chemistry: A new era of synthesising polyhydroxylated carbon nanomaterials with hydroxyl groups and their industrial aspects. ULTRASONICS SONOCHEMISTRY 2019; 51:451-461. [PMID: 30224290 DOI: 10.1016/j.ultsonch.2018.07.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/09/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
The main objective of this review is to derive the salient features of previously developed ultrasound-assisted methods for hydroxylating graphene and Buckminsterfullerene (C60). The pros and cons associated to ultrasound-assisted synthesis of hydroxy-carbon nanomaterials in designing the strategical methods for the industrial bulk production are also discussed. A guideline on the statistical methods has also been considered to further provide the scopes towards the application of the previously reported methods. Irrespective of many useful methods that have been developed in order to functionalize C60 and graphene by diverse oxygenated functional groups e.g. epoxide, hydroxyl, carboxyl as well as metal/metal oxide via a combination of organic chemistry and sonochemistry, there is no report dealing exclusively on the application of ultrasonic cavitation particularly to synthesising polyhydroxylated carbon nanomaterials. On this context, this review emphasizes in investigating the critical aspects of sono-nanochemistry and the statistical approaches to optimize the variables in the sonochemical process towards a large-scale synthesis of polyhydroxylated graphene and C60.
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Affiliation(s)
- Sadia Afreen
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia
| | - Kasturi Muthoosamy
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia
| | - Sivakumar Manickam
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia.
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Plattes M, Köhler C, Gallé T. Disequilibrium calorimetry for determination of ultrasonic power in sonochemistry. MethodsX 2017; 4:274-278. [PMID: 28932695 PMCID: PMC5596357 DOI: 10.1016/j.mex.2017.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 08/24/2017] [Indexed: 11/29/2022] Open
Abstract
The two most characteristic properties of an ultrasonic wave are the frequency and the power. It is therefore important to determine the power in a given reactor. This can be done by calorimetry, i.e. by measuring the temperature rise in the vessel during sonication starting at thermal equilibrium with the surroundings (classic calorimetry) [1–3]. However, the classic ultrasonic calorimetry has drawbacks. In particular it is difficult to evaluate the temperature rise at thermal equilibrium, because the relevant initial time and temperature intervals are small and measurement errors in the temperature readings are large. Also the initial temperature response of the probe is complex [4]. The authors propose to start the calorimetric measurement at thermal disequilibrium, i.e. with a lower temperature in the reaction vessel. During sonication the temperature in the reaction vessel rises faster than in the surrounding and passes thermal equilibrium. The acoustic power transferred to the vessel at thermal equilibrium can then be calculated. The method consists of: Setting up the reaction vessel at lower temperature than the surroundings (ultrasonic bath or air). Measuring temperature rise in the reaction vessel and the surroundings during sonication. Determine the temperature rise at intercept by interpolation and calculate the ultrasonic power in the reaction vessel.
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