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Water pollution is major issue in global due rapid industrialization. The release of textile dyes from the industries to the environment has become a significant health issue to humans, trees and animals. The work describes the green synthesis of Mexican mint leaves plant derived silver nanoparticles (MM-AgNPs). The synthesized MM-AgNPs was well characterized by several techniques. MM-AgNPs used as photocatalytic degradation of toxic dyes and catalytic transformation of 4-nitrophenol into 4-aminophenol. Interestingly, Toluidine blue, Congo red, Pyronine Y dye, after mixing with NaBH4 and MM-AgNPs were completely decolorized. The degradation efficiency was calculated for each dye and kinetic parameters. Also, MM-AgNPs act good catalyst for the decolorized of dyes from industrial wastewater and degradation mechanism was proposed. Further synthesized MM-AgNPs applied as a catalyst for the reduction of 4-nitrophenol to 4-aminophenol within 8 min. Finally, this work is more suitable for the good photocatalytic degradation and reduction in the filled of interdisciplinary material science and environmental science.