In this study, a facile and environmental friendly method was used to synthesise silver nanoparticles coated magnetic nanoparticles (AgNPs@Fe3O4). Silver nanoparticles were deposited on the surface of unmodified magnetic nanoparticles using silver mirror reaction. It avoids surface modification of either the magnetic nanoparticles or silver nanoparticles. The nanocomposites were characterized using scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and surface-enhanced Raman spectroscopy (SERS). Following performance optimization based on the reduction of 4-nitrophenol (4-NP) as the model reaction, the as prepared catalyst proved effective in degrading other pollutant dyes such as methylene blue (MB) and Rhodamine 6G (R6G). Moreover, this nanocomposite exhibited SERS effect for real-time monitoring of reduction of 4-nitrothiophenol (4-NTP) using SERS. A recyclability study which could easily be carried out given the magnetic properties of the nanocatalysts revealed the catalytic activity of the particles was maintained without a significant decrease up to eight cycles.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics