Mycosynthesis of gold nanoparticles by the Portabello mushroom extract, Agaricaceae, and their efficacy for decolorization of Azo dye

Abstract This research is the first attempt on using fruitbodies of Portabello mushroom (Agaricus bisporus) as a newly mycoreducer agent used in the myco-synthesis of gold nanoparticles (AuNPs). The biosynthesized AuNPs were described for their chemical and physical characteristics by UV-Vis spectra, the change in color, AFM, FESEM, XRD, Zeta Potential, DLS, and FT-IR analyses. The AuNP was investigated for its activity to decolorize MB (Methylene Blue) dye. However, the magenta color of gold nanoparticles indicated that the colloidal AuNPs contained a mixture of oval, spherical, drum-like, hexagonal, and triangular shapes reaches 53 nm in the diameter. Clearly, XRD exhibited that the formed Au nanoparticles in this study were crystalline. In contrast, data of Zeta Potential and DLS exhibited that myco-synthesized gold NPs showed remarkable aggregation and stability characteristics in the colloidal AuNPs solution. FTIR revealed the attachment of the amino acid, polysaccharide, and phenol as a mycoreducer agent capped gold NPs. The degradation activity showed that decolorizing Methylene Blue increased with the increasing the time of incubation in the finding of gold NPs. The mycosynthesized AuNPs using extracts of Agaricus bisporus can act as nanocatalysts in the reduction of Methylene Blue which showed the best decolorization at 97.98%.