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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

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Synthesis and Characterization of Lignin-Silver Nanoparticles.

Dominik Maršík¹, Petter Paulsen Thoresen², Olga Maťátková¹

¹Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic.

Molecules (Basel, Switzerland)

|May 25, 2024

Summary

This study presents a green synthesis of silver nanoparticles using lignin, a renewable material. These lignin-modified silver nanoparticles show potential for biomedical applications due to their uniform size and thermal properties.

Keywords:

green synthesis lignin-silver nanoparticles plasmon resonance

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Area of Science:

Materials Science
Nanotechnology
Green Chemistry

Background:

Environmentally friendly synthesis of metal nanoparticles is crucial.
Lignin, a renewable resource, offers potential as a sustainable precursor.
Conventional methods often involve harsh chemicals and conditions.

Purpose of the Study:

To develop a robust green synthesis route for lignin-modified silver nanoparticles.
To characterize the synthesized nanoparticles and evaluate their properties.
To explore potential applications, particularly in the biomedical field.

Main Methods:

Green synthesis using recovered lignin as a reducing and capping agent.
Optimization of reaction conditions in aqueous solution (pH 11).
Characterization using UV-Vis spectroscopy, AAS, DLS, TEM, XRD, and XPS.

Main Results:

Homogeneous silver nanoparticles (12-15 nm) with high uniformity were synthesized.
High yield (>0.010 mol L⁻¹) and minimal precursor loss (0.5-3.9%) were achieved.
Ag-O bonding confirmed lignin functionalization; nanoparticles exhibited localized thermal effects under NIR irradiation.

Conclusions:

Lignin is a viable renewable agent for silver nanoparticle synthesis.
The developed method addresses limitations of traditional green synthesis.
Lignin-modified silver nanoparticles show promise for targeted biomedical applications.