Phytosynthesis of Au, Ag, and AuAg Bimetallic Nanoparticles Using Aqueous Extract of Sago Pondweed (Potamogeton pectinatus L.)

Phytosynthesis of Au, Ag, and AuAg Bimetallic Nanoparticles UsingAqueous Extract of Sago Pondweed Summervir Cheema

Bimetallic ParticlesApplicationsImportant-CatalysisUtilized-Oxidation of CO, alcoholSynthesis (NOT EASY)-Phase Separation, Core shell particlesCapping agents, Reducing Agents=Environmental Hazard.Role of Plants- SIMPLE, PRACTICLE, SCALABLEPhytocheimicals- Flavonoids, Proteins

MaterialsPlant Material- Egypt, Lake MarriottPreparation of Aqueous extract- 1.5 g plant in 30 ml distilled water, heated at 80 degree, followed by centrifugation at 4000 rpm.

Methods Total phenolic content determination- Folin- Ciocalteu assay. 1mL aliquot of extract+7.5 ml of 0.2 M NaOH +3.5 mL of FC reagent.Synthesis and stability of Metal Nanoparticles: 1.5 ml of extract, 15ml of 10^-3 M HAuCl4. H2O, AgNO3+ HAuCl4. H2O, AgNO3 (1:1 molar ratio). Solution was heated at 80 deg for 15 min--Au, 30 minAg, Au-Ag.

Studying the effect of different concentrations (10^-2, 10^-3, 10^-4) of the precursor salt, reaction times (10, 20, 30 ,40, 50 min) temperatures, and Ph Conditions (2,3.5,4,6.5,12), molar ratio (0:1, 1:3,1:1,3:1,1:0).Size, morphology, composition were investigated in the study.

UV-VIS Spectral Analysis of nanoparticles

Effect of molar ratio on bimetallic nanoparticles

TEM ANALYSIS of nanoparticles/SAED

a. AU, b. Ag, c. ph 4, d. Au, e. Ag, f. ph 12

EDX Analysis

XRD pattern

ConclusionTotal phenolic content= 7.4 micro gram gallic acid equivilants/mlAlloy nature of bimetallic particles was confirmed at pH-12Flavonoids and proteins are mainly responsible for the stabilization of the nanoparticles.

ReferenceAbdelHamid, A. A.; Al-Ghobashy, M. A., Fawzy, M.; Mohamed, M.B.; Abdel-Mottaleb, Mohamed M.S.A Abdel-Mottaleb. Phytosynthesis of of Au, Ag, and AuAg Bimetallic Nanoparticles Using Aqueous Extract of Sago Pondweed(potamogeton pectinatus L.) ACS Sustainable Chem. Eng. 2013, 1, 1520-1529.