What is it about?
The AgNPs began to form just after the addition of aqueous extract of Laggera plant to the aqueous solution of Silver nitrate (AgNO3) at room temperature. The biosynthesized AgNPs were characterized by different techniques, such as Fourier Transform Infrared (FTIR) spectroscopy, X-ray Diffraction (XRD), and UVVisible Spectroscopy. The absorption spectra obtained from UV-Visible spectroscopy showed a sharp Surface Plasmon Resonance (SPR) peak at 451 nm which confirmed the formation of AgNPs. The average particle size of AgNPs was 53 nm as determined by X-ray Diffraction measurement. The FTIR study showed characteristic peaks corresponding to the functional groups that act as capping and stabilizing agent to AgNPs.
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Why is it important?
Nowadays, silver nanoparticles (AgNPs) have gained more attention due to their excellent applications in medicine, biomedical, food industry, and smart textile industries [9]. There have been different methods involved in the synthesis of AgNPs, such as wet chemical, sol-gel, hydrothermal, etc. These physical and chemical approaches have many disadvantages, such as toxic waste, high capital cost, toxic by-products which cause environmental pollution. There is another approach of biological method which is eco-friendly and no toxic by-products.
Perspectives
we have successfully biosynthesized silver nanoparticles (AgNPs) using an aqueous extract of the medicinal plant Laggera crispata (Vahl) Hpper and J.R.l Wood leaves. The Laggera plant extract acts as a reducing agent for AgNO3. The aqueous solution of AgNO3 was mixed with the plant extract at room temperature and allowed it for overnight to form AgNPs. The formation of AgNPs was confirmed by colour change from light brown/yellow to dark brown and also UV-Visible spectroscopy. The UV-Visible spectrum showed a sharp peak at 451 nm which was due to the presence of surface plasmon resonance (SPR) electrons on AgNPS. The FTIR results found several phytochemicals responsible for the rapid reduction of Ag+ ions, leading to Ag nanoparticles formation. Particularly, hydroxyl groups oxidation of hydrolysate, which likely stimulated the formation of nanoparticles. In XRD data, 2θ positions identify silver crystalline particles having (hkl) values, characteristic to face centered cubic (FCC) silver. The average crystalline size was estimated to be 53 nm which confirms that the acquired sample contains nanoparticles
Bulcha Belay Etana
Ghent University,Belgium
Read the Original
This page is a summary of: Improved biosynthesis and characterization of silver nanoparticles using Laggera crispata (Vahl) Hepper and J.R.l Wood leaves extract, January 2023, American Institute of Physics,
DOI: 10.1063/5.0131853.
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