International Journal of Nanomedicine (Dec 2017)
Synthesis, structural characterization and catalytic application of citrate-stabilized monometallic and bimetallic palladium@copper nanoparticles in microbial anti-activities
Abstract
Inayat Ullah,1 Khakemin Khan,2 Muhammad Sohail,3 Kifayat Ullah,4 Anwar Ullah,4 Shabnum Shaheen5 1Lanzhou Center for Tuberculosis Research and Institute of Pathogen Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, People’s Republic of China; 2Department of Chemistry, Hazara University, Mansehra, Khyber Pakhtunkhwa, Pakistan; 3School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, People’s Republic of China; 4Department of Biosciences, COMSATS Institute of Information Technology, Park Road, Chack Sahzad, Islamabad, Pakistan; 5Department of Botany, Lahore College for Women University, Lahore, Punjab-Pakistan Abstract: In this research work, copper (Cu), palladium (Pd) and their bimetallic palladium@copper (Pd@Cu) nanoparticles were synthesized using trisodium citrate as a stabilizing agent using the known chemical reduction method. The synthesized Cu, Pd and Pd@Cu 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 Pd@Cu nanoparticles. The synthesized Cu, Pd and their bimetallic Pd@Cu nanoparticles were used as catalysts for the reduction of 4-nitrophenol in the presence of NaBH4. The bimetallic Pd@Cu 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 (R2) was found to be 0.99 for these three nanoparticles. Meanwhile, the effect of Cu, Pd and bimetallic Pd@Cu nanoparticles was checked on the physiology of specific different micro-organism strains. The bimetallic Pd@Cu nanoparticles reported the maximum resistance at maximum level the growth of bacterial strain and had observed a smooth antibacterial graph than the monometallic analogs. Keywords: stabilizing agent, bimetallic nanoparticles, catalytic activities, antimicrobial effects
