Fe3Pt-Ag nanoparticles: A novel generic approach towards detection and reduction for Rhodamine B

Abstract

Multifunctional nanocomposites with well-defined structures and optimized electromagnetic properties are highly desirable in surface-enhanced Raman scattering (SERS) and catalytic reduction reactions. We report a novel multifunctional Fe3Pt–Ag nanoparticle with efficient SERS performance and excellent catalytic activity. Fe3Pt–Ag shows an obviously enhanced SERS effect, which is evaluated by enhanced Raman signal of Rhodamine B (RhB). Efficient SERS performance of Fe3Pt–Ag is attributed to the optical property of local surface plasmon resonance of Ag nanoparticles (NPs). Importantly, spontaneous catalytic reduction reactions of RhB illustrate that Fe3Pt–Ag possesses good catalytic performance. In combination with the theories of pseudo-first-order kinetics, catalytic reduction reactions are analysed in detail, and experimental data are in line with theoretical results. Fe3Pt–Ag can be easily recycled at least six times via an external magnetic field, elaborating that our developed Fe3Pt–Ag can be applied to protect environment as a novel composite material.