Biosynthesis of Ag Nanoparticles at Ziziphus Jujuba Kernel Substrate using Tilia platyphyllos Extract: Catalytic Activity for Reduction of Organic Dyes

Document Type : Research Paper


Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran


For the first time the extract of the plant of Tilia platyphyllos was used to green synthesis of Ag nanoparticles (NPs) supported on Ziziphus jujuba kernel as an environmentally benign support. Ag NPs/ Ziziphus  jujuba  kernelas  an  effective  catalyst  was  prepared  through reduction  of Ag+ions using Tilia  platyphyllos extractas  the  reducing  and capping agent  and Ag  NPs immobilization on Ziziphus jujuba kernel surface in the absence of any stabilizer or surfactant. According to FT-IR analysis, the hydroxyl groups of phenolics in Tilia platyphyllos extract as bioreductant agents are directly  responsible  for  the  reduction  of  Ag+ions  and  formation  of  Ag  NPs. The  as-prepared catalyst  was  characterized  by  Fourier  transform  infrared  (FT-IR)  and  UV-Vis  spectroscopy,  field emission  scanning  electron  microscopy  (FESEM)  equipped  with  an  energy  dispersive X-ray spectroscopy  (EDS),  Elemental  mapping,  X-ray  diffraction  analysis  (XRD) and  transmittance
electron microscopy (TEM). The synthesized catalyst was used in the reduction of Congo Red (CR), and Methyl Orange (MO) at room temperature.The Ag NPs/Ziziphus jujuba kernel showed excellent catalytic  activity  in  the  reduction  of  these  organic  dyes.  In  addition, it  was  found  that  Ag NPs/Ziziphus  jujuba  kernelcan  be  recovered  and  reused several  times  without  significant  loss  of catalytic activity.