Kinetic and Mechanistic Study of The Catalytic Activity of lr Cu Bimetallic Nanoparticles in the Oxidation of Some Azo Dyes by Hex cyanoferrate III Ions

Abstract

newline Azo dyes are widely used in textile, plastic, paper, food, cosmetic, leather, pharmaceutical and newlinephotographic industries. These are resistant to chemical and biological degradation process due newlineto low reactivity of azo linkage and stable aromatic structures. Owing to their toxicity and newlinecontamination, the efficient degradation of these azo dyes has become a challenging task in newlinerecent years. Now-a-days, rapidly rational design methods are being replaced by nanocatalyst newlineutilizing fundamental knowledge of catalysts at the nanoscale. The beginning of nanoscience and newlinenanotechnology is offering the ability, to produce controlled structures and geometries, to newlineexplore and optimize a wide range of catalytic processes. Consequently, several studies are newlineproviding the fundamental insight into key features that influence the activity, selectivity and newlinedurability of nanocatalysts. In recent times, transition metals, metal oxide, metal salts, mixed newlinemetal oxides in the form of nanoparticles have come into sight as viable alternative to bulk newlinematerials in various field of chemistry. Therefore, nano scale catalysts have potential for newlineimproving the efficiency, selectivity and yield of catalytic processes. Additionally, nanoparticles newlinehave ability to disperse into the solution and provide higher surface to volume ratio despite the newlinefact that participating in the reaction. On other hand, higher selectivity of the nanoparticles newlinetowards reaction proceeds through least waste and lacking impurities which could lead to safer newlinetechnique and reduced environmental impact. newlineThus in the present work a catalytic oxidative kinetic method has been used for the degradation newlineof azo dyes. The reaction between dyes and hexacyanoferrate (III) ions in aqueous alkaline newlinemedium in presence of Ir-Cu bimetallic nanoparticles has been used for the study. In this context, newlinebimetallic nanostructures show remarkably improved optical, catalytic and electronic properties newlinewith respect to monometallic counterparts.