PdCu Nanoparticles Stabilized on Porous CeO₂ for Catalytic Degradation of Azo Dyes: Structural Characterization and Kinetic Studies

Abstract

In this work, a series of porous CeO2 stabilized PdCu nanoparticles are synthesized by a modified hydrothermal method and applied for catalytic reductive degradation of azo dyes. For the synthesis of CeO2 support a simple precipitation method is adopted using ammonium oxalate as precipitant. Synthesized support and nanoparticles are characterized by XRD, TGA, BET surface area, SEM/EDX, TEM, Raman, UV‐visible DRS, FTIR and XPS analyses. Catalytic studies show that the synthesized nanoparticles can efficiently reduce model azo dyes, methyl orange (MO) and congo red (CR) with good recyclability. Among various PdCu compositions, Pd1Cu9/CeO2 exhibits superior catalytic activity towards reductive degradation of MO and CR at room temperature. Thus, PdCu/CeO2 nanoparticles can be accepted as potential component for the application in wastewater treatment.

Advances in porous and nanoscale catalysts for viable biomass conversion

“…A plausible solution to circumvent this problem is to deposit metal nanoparticles on a high surface area metal oxide. [287][288][289][290] The aim of using this route is to obtain uniformly dispersed metal nanoparticles and to improve their stability via strong metal-support interactions. 287 Tauster et al 291 introduced this metal-support interaction concept and emphasized the importance of the support role in enhancing the properties of metal nanoparticles.…”

Enhancement of azo dyes removal efficiency by using LDH/Tris/Pd catalyst: Kinetic studies

“…In the reduction reaction, palladium in metallic form demonstrates high catalytic activity as it has been mentioned in several methods reported for the degradation of azo dyes using supported Pd nanoparticles . In the catalyst filed, the supported catalyst system has gained more attention as compared to their unsupported form and due to the high surface area, high reusability, increasing catalytic activity, and simplicity of separation . Nowadays, the immobilization of metal active sites onto supports to produce heterogeneous and reusable catalysts has attracted much more attention .…”

Cobalt‐Copper Nanoparticles Catalyzed Selective Oxidation Reactions: Efficient Catalysis at Room Temperature

“…In this context, we have developed bimetallic nanocatalysts for nitroarenes reduction using Ni‐Mn 2 O 3 , Cu‐Ni, Cu‐Pd and room temperature conversion of Cr(VI) to Cr(III) using Cu−Ni and Cu‐Pd,, and azo dye degradation for wastewater treatment using Cu−Pd stabilized on CeO 2 . These discoveries are highly significant in terms of identification and understanding of mechanistic insight and synergistic effect of bimetallic systems, and in developing new strategies for nanocatalysis using less expensive metals.…”