Facile size-regulated synthesis of silver nanoparticles using pectin

Area of Science:

• Materials Science
• Nanotechnology
• Biochemistry

Background:

• Silver nanoparticles (AgNPs) exhibit unique optical and antimicrobial properties.
• Developing cost-effective and scalable synthesis methods for AgNPs is crucial.
• Pectin, a natural polysaccharide, offers potential as a green capping and reducing agent.

Purpose of the Study:

• To synthesize monodispersed silver nanoparticles using pectin.
• To characterize the size, shape, and composition of the synthesized AgNPs.
• To propose a mechanism for AgNP formation mediated by pectin.

Main Methods:

• Reaction of silver nitrate with alkali hydrolyzed pectin at 70°C.
• UV-visible spectral analysis for metallic silver confirmation.
• Transmission electron microscopy (TEM) for size and morphology analysis.
• Dinitrosalicylic acid assay for monitoring reducing sugars.

Main Results:

• Spherical, monodispersed silver nanoparticles with a diameter of 5-10nm were successfully synthesized.
• Pectin acted as both a reducing and stabilizing agent.
• UV-vis spectroscopy confirmed the presence of metallic silver.
• TEM analysis showed a narrow size distribution.

Conclusions:

• Alkali hydrolyzed pectin is an effective agent for facile, rapid, and large-scale synthesis of silver nanoparticles.
• The proposed mechanism provides insight into pectin-mediated nanoparticle formation.
• This green chemistry approach offers a sustainable route for producing functional silver nanoparticles.