Green synthesis of Ag nanoparticles on the calcite support using Salix aegyptiaca leaf extract and its catalytic activity investigation in removal of dyes

Subject Areas :

akbar Rostami ¹ , leila rostami ²

1 - Assistant Prof. of Inorganic Chemistry, Faculty of Science, University of Qom, Qom, Iran
2 - M.Sc. Student in Chemistry Department, Faculty of Science, University of Qom, Qom, Iran

Received: 2019-07-22 Accepted : 2020-02-20 Published : 2020-08-22

Keywords: nanocomposite, Green synthesis, Ag Nanoparticles, Mineral supports, Removal of dyes,

Abstract :

In this work, Ag nanoparticles (Ag NPs) were immobilized on the surface of mineral calcite (CaCO3) using leaf extract of pussy willow (Salix aegyptiaca) as reducing and stabilizing agent. Conversion of Ag+ to Ag NPs was carried out within a few minutes at room temperature. The calcite and its Ag nanocomposite (Ag NPs/Calcite) were characterized by fourier transform infrared (FTIR), ultraviolet and visible spectroscopy (UV-Vis), X-ray powder diffraction (XRD) and field emission scanning electron microscope (FESEM) couplied with energy dispersive X-ray spectroscopy (EDS or EDX), and transmission electron microscopy (TEM) techniques. The broad peaks between 450-500 nm in the UV-Vis spectrum of silver nanoparticles and Ag NPs/Calcite is assigned to a surface plasmon absorption. According to the TEM image, the average size of the Ag NPs on the surface of calcite surface was 11 nm. The Ag NPs/Calcite nanocomposite was used in the catalytic reduction reaction of methyl orange (MO), methylen blue (MB), and rhodamine B (RhB). The catalyst was reused three times without considerable loss in its activity.

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