Synthesis, structural characterization and catalytic application of citrate-stabilized monometallic and bimetallic palladium@copper nanoparticles in microbial anti-activities

In this research work, copper (Cu), palladium (Pd) and their bimetallic [email protected] ( [email protected] ) nanoparticles were synthesized using trisodium citrate as a stabilizing agent using the known chemical reduction method. The synthesized Cu, Pd and [email protected] nanoparticles were characterized by the ultraviolet–visible spectroscopy, scanning electron microscopy and X-ray diffraction spectroscopy, respectively. The different volumes of trisodium citrate were used for the stability of synthesized monometallic Cu, Pd and bimetallic [email protected] nanoparticles. The synthesized Cu, Pd and their bimetallic [email protected] nanoparticles were used as catalysts for the reduction of 4-nitrophenol in the presence of NaBH 4 . The bimetallic [email protected] nanoparticles had efficient catalytic activities with a high rate constant (1.812 min -1 ) as compared to monometallic Cu (0.3322 min -1 ) and Pd (0.2689 min -1 ) nanoparticles, respectively. The correlation coefficient ( R 2 ) was found to be 0.99 for these three nanoparticles. Meanwhile, the effect of Cu, Pd and bimetallic [email protected] nanoparticles was checked on the physiology of specific different micro-organism strains. The bimetallic [email protected] nanoparticles reported the maximum resistance at maximum level the growth of bacterial strain and had observed a smooth antibacterial graph than the monometallic analogs.