Applications of surface modified Fe ₃ O ₄ based nanoparticles for the oxidation of various alcohols: a review

This study highlights various methods to functionalize Fe3O4 nanoparticles, which effectively bridging between heterogeneous and homogeneous catalysis. Incorporating magnetic nanoparticles enables efficient magnetic separation offering a faster and safer alternative to filtration or centrifugation without any hazardous method. Magnetite, also referred to as ferrite (Fe3O4) serves as a flexible support for the preparation of magnetically separable nanoparticles. By functionalizing ferrite with catalytically active Schiff base metal complexes (such as Pd, Pt, Cu, Ni, Co, Ir, Fe etc.) immobilized on its surface it becomes an effective magnetically separable heterogeneous nanocatalyst suitable for a range of organic transformations. Functionalized magnetically retrievable catalysts which are mainly used as a catalyst for alcohol oxidation reactions by using various oxidizing agents such as H2O2, TBHP, Oxone, HIO4, H5IO6, O2, PhI(OAc)2, TBN, t-BuOOH, NaIO4 etc. are summarized in this review. The manuscript provides an overview of recent advancements in developing and functionalizing Fe3O4 nanoparticles for catalytic applications in alcohol oxidation. It examines the synthesis, surface modification, and optimization conditions that enhance catalytic performance, selectivity, and yield. By analyzing substrate scope and conversion rates, the review highlights the role of Fe3O4 nanoparticles in enabling more efficient, selective, and sustainable methods for organic transformations, supporting green chemistry goals.