Green synthesis of Fe3O4@SiO2-Ag magnetic nanocatalyst by using flower extract and its application as recoverable catalyst for reduction of dye pollutants in water

This paper reports the green and in-situ preparation of the Fe3O4@SiO2-Ag a magnetic nanocatalyst synthesized using flower extract without addition of any stabilizers or surfactants. The as-synthesized nanoparticles have been characterized by transmission electron microscopy (TEM) and Fourier transform infrared spectra (FT-IR). The catalytic performance of the resulting nanocatalyst was examined for the reduction of 4-nitrophenol (4-NP), methylene blue (MB) and methyl orange (MO) in an environmental friendly medium at room temperature. The catalyst was recovered using an external magnet and reused several times with negligible loss of catalytic activity.

Keywords:

Fe3O4@SiO2-Ag , methylene blue , methyl orange , 4-nitrophenol