Nanoscale (1-100nm) zero-valent iron (nZVI) has been used to degrade organic contaminants (e.g. pesticides, dyes, etc.) and inorganic anions. However, it still possesses drawbacks such as instability and low reactivity duration due to oxidation. In order to solve these problems, a secondary metal (i.e. Ag, Cu, Zn and Pd) is usually added to the iron so as to form a bimetallic system which is effective at degradation of pollutants in a catalytic manner. Even though bimetallic materials have been shown to have increased degradation rates, trimetallic materials have recently been shown to exhibit better performance in degrading pollutants. In this work, we report on the synthesis and characterization of Fe/Cu/Ag nanoparticles prepared using the bottom-up approach. These particles pollution degradation capacity was tested using methyl orange dye (MO) as a model pollutant. The aforementioned nanoparticles were characterized using XRD, EDS, SAXS and TEM analyses. The analyses confirmed the successful synthesis of the nanoparticles; TEM analysis showed the nanoparticles to be hexagonal to spherical in shape and having the desired core-shell structure, with Fe in the core, Cu and Ag on the shell. The XRD patterns further confirmed the formation of the zerovalent trimetallic nanoparticles. The degradation tests of MO on Fe/Cu/Ag nanoparticles showed a great degradation within few minutes into the reaction. The effect of parameters such as nanoparticle dosage, initial MO concentration and solution pH on the degradation of MO was investigated. MO degradation efficiency reached 100 % within 1 min into the reaction at a low pH, lower initial MO concentration and higher nanoparticle dosage.