Nanocomposites based on Fe3O4 and BaTiO3 in oxidation of benzyl alcohol and 1-phenylethanol using different energy inputs

Green chemistry focuses on developing environmentally friendly processes that minimize waste and reduce the use of hazardous substances. [1] In this regard, this abstract explores the oxidation of alcohols, specifically benzyl alcohol and 1-phenylethanol, using unconventional methods such as microwave and ultrasound irradiation and nanocomposites based on Fe3O4 and BaTiO3 as heterogeneous catalysts. The oxidation of primary and secondary alcohols is a significant transformation in organic synthesis. Benzaldehyde and acetophenone products of the oxidation of benzyl alcohol and 1-phenylethanol, respectively are versatile compounds with wide industrial applications more concretely used in dyes, perfumes, and pharmaceuticals. [2] Barium titanate (BaTiO3) and magnetite (Fe3O4) are promising materials to use on different energy inputs due to their properties, once the ceramic one (BaTiO3) presents ferroelectric, piezoelectric, and dielectric behaviours,[3] meanwhile the iron oxide exhibit ferromagnetism, meaning it becomes magnetized in the presence of a magnetic field and retains its magnetization when the field is removed.[4] Microwave irradiation provides rapid heating due to the interaction of electromagnetic waves with the reaction mixture, leading to accelerated reactions.[5] Ultrasound irradiation generates cavitation bubbles that enhance mass transfer and promote reaction kinetics.[6] Both methods offer efficient ways to carry out alcohol oxidations with improved selectivity and reduced energy consumption. 

Audience Takeaway Notes: 

• Green chemistry emphasizes environmentally friendly processes that minimize waste and hazardous substances.
• Utilizing unconventional methods like microwave and ultrasound irradiation, along with nanocomposites as catalysts, enhances the oxidation of alcohols such as benzyl alcohol and 1-phenylethanol.
• The resulting products, benzaldehyde and acetophenone, are versatile compounds with wide industrial applications in dyes, perfumes, and pharmaceuticals. 
• Barium titanate (BaTiO3) and magnetite (Fe3O4) exhibit unique properties making them promising materials for various energy inputs, contributing to efficient and sustainable chemical processes.