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Open AccessArticle

Ultrasound and Radiation-Induced Catalytic Oxidation of 1-Phenylethanol to Acetophenone with Iron-Containing Particulate Catalysts

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Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2
Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
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Área Departamental de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, 1959-007 Lisboa, Portugal
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BSIRG, IBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
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BioISI-Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1049-001 Lisboa, Portugal
*
Authors to whom correspondence should be addressed.
Molecules 2020, 25(3), 740; https://doi.org/10.3390/molecules25030740
Received: 16 January 2020 / Revised: 5 February 2020 / Accepted: 6 February 2020 / Published: 8 February 2020
(This article belongs to the Special Issue Mechanically Responsive Materials and Their Applications)
Iron-containing particulate catalysts of 0.1–1 µm size were prepared by wet and ball-milling procedures from common salts and characterized by FTIR, TGA, UV-Vis, PXRD, FEG-SEM, and XPS analyses. It was found that when the wet method was used, semi-spherical magnetic nanoparticles were formed, whereas the mechanochemical method resulted in the formation of nonmagnetic microscale needles and rectangles. Catalytic activity of the prepared materials in the oxidation of 1-phenylethanol to acetophenone was assessed under conventional heating, microwave (MW) irradiation, ultrasound (US), and oscillating magnetic field of high frequency (induction heating). In general, the catalysts obtained by wet methods exhibit lower activities, whereas the materials prepared by ball milling afford better acetophenone yields (up to 83%). A significant increase in yield (up to 4 times) was observed under the induction heating if compared to conventional heating. The study demonstrated that MW, US irradiations, and induction heating may have great potential as alternative ways to activate the catalytic system for alcohol oxidation. The possibility of the synthesized material to be magnetically recoverable has been also verified. View Full-Text
Keywords: iron catalysts; alcohol oxidation; ball-milling; mechanochemical synthesis; microwave irradiation; ultrasound; induction heating; magnetic recovery iron catalysts; alcohol oxidation; ball-milling; mechanochemical synthesis; microwave irradiation; ultrasound; induction heating; magnetic recovery
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MDPI and ACS Style

Soliman, M.M.A.; Kopylovich, M.N.; Alegria, E.C.B.A.; Ribeiro, A.P.C.; M. Ferraria, A.; M. Botelho do Rego, A.; Correia, L.M.M.; Saraiva, M.S.; Pombeiro, A.J.L. Ultrasound and Radiation-Induced Catalytic Oxidation of 1-Phenylethanol to Acetophenone with Iron-Containing Particulate Catalysts. Molecules 2020, 25, 740. https://doi.org/10.3390/molecules25030740

AMA Style

Soliman MMA, Kopylovich MN, Alegria ECBA, Ribeiro APC, M. Ferraria A, M. Botelho do Rego A, Correia LMM, Saraiva MS, Pombeiro AJL. Ultrasound and Radiation-Induced Catalytic Oxidation of 1-Phenylethanol to Acetophenone with Iron-Containing Particulate Catalysts. Molecules. 2020; 25(3):740. https://doi.org/10.3390/molecules25030740

Chicago/Turabian Style

Soliman, Mohamed M.A.; Kopylovich, Maximilian N.; Alegria, Elisabete C.B.A.; Ribeiro, Ana P.C.; M. Ferraria, Ana; M. Botelho do Rego, Ana; Correia, Luís M.M.; Saraiva, Marta S.; Pombeiro, Armando J.L. 2020. "Ultrasound and Radiation-Induced Catalytic Oxidation of 1-Phenylethanol to Acetophenone with Iron-Containing Particulate Catalysts" Molecules 25, no. 3: 740. https://doi.org/10.3390/molecules25030740

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