Studies related to cyclodextrin (CD) polymers have grown in recent years to produce multifunctional materials with minimal environmental impacts. This is associated with the low toxicity of CD polymers as well as their ability to remove pollutants and to stabilize nanoparticles. The objectives of the present work were to evaluate the catalytic activity of a nanocomposite of 𝛃-CD polymer and silver  nanoparticles (AgNP) [2] in the reduction of 4-nitrophenol to 4-aminophenol and to verify the photocatalytic capacity in the removal of organic pollutants, using blue methylene (MB) as a model. The polymer was obtained by esterification of 𝛃-CD with glutamic acid and was used to obtain AgNP in a single step, as a reducing and stabilizing agent. For the catalysis tests, the catalytic activity of the nanocomposite in the reduction of 4-nitrophenol in the presence of excess sodium borohydride in water was observed under heterogeneous conditions and the UV-vis absorbance spectra were obtained. From the 4-nitrophenol reduction assays, it was possible to verify the catalytic activity of silver nanoparticles in 16 min, with a significant reduction in
absorption at 400 nm indicating the conversion of p-nitrophenol to p-aminophenol. The spectrophotometric tests of the photocatalytic activity using the nanocomposites of an aqueous solution of MB indicated a photodegradation of the dye, as there was a decay of the absorption band at 664 nm. This fact is associated with a reduction in the concentration of the dye chromophore group. The nanocomposites have shown promising results to act in the environmental catalysis.