Capsule-Like Fe3O4 Nanoparticles and Triangle Fe3O4 Nanoplates: Facile Synthesis, Magnetic Properties and Catalytic Performance

In this work, Fe3O4 with nanosized triangle plates and capsule-like nanoparticles were prepared by solvothermal approach (Fe3O4-S) and hydrothermal approach (Fe3O4-H), respectively and their catalytic performance as a heterogeneous Fenton-like catalyst are investigated. Excellent ferromagnetic properties are obtained in both Fe3O4-S nanoplates and Fe3O4-H nanoparticles. The Fe3O4-S nanoplates exhibited better catalytic performance than Fe3O4-H nanoparticles in the degradation of Rhodamine B (RhB) with hydrogen peroxide. The relatively high catalytic activity of Fe3O4-S can be ascribed to its high specific surface area and high degree of crystallinity. Fe3O4-S nanoplates also exhibit good catalytic stability and reusability and do not generate significant loss of catalytic activity after four cycles of degradation.