Antioxidant silver nanoparticles (AgNPs) and platinum nanoparticles (PtNPs) were synthesized by using ginger and turmeric extracts with green method in this work. Thus these nanoparticles synthesized were characterized by UV-Vis spectroscopy, SEM-EDX and FTIR. The UV-Visible spectra of the AgNPs revealed a characteristic surface plasmon resonance peak at 420-425 nm and the UV-Visible spectra of the PtNPs revealed a characteristic surface plasmon resonance peak at 234-240 nm. The synthesized AgNPs and PtNPs acted as a catalyst to the degradation of dyes (rhodamine B, methyl orange, and methylene blue) with sodium borohydride (NaBH4). Green synthesized antioxidant silver nanoparticles effectively degraded the dyes nearly 4-10 min. and green synthesized antioxidant platinum nanoparticles effectively degraded the dyes nearly 15-24 min. of exposure time.