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Biopolymer capped silver nanoparticles with potential for multifaceted applications.

Ageetha Vanamudan¹, P Padmaja Sudhakar¹

¹Department of Chemistry, Faculty of Science, The M. S. University of Baroda, Sayajigunj, Vadodara 390002, India.

International Journal of Biological Macromolecules

|January 24, 2016

Summary

Green synthesis of silver nanoparticles using guargum offers a sustainable, low-cost method. These nanoparticles effectively detect dyes and catalyze their degradation, reducing organic pollutants.

Keywords:

Degradation Dyes Guargum Nanoparticles SERS Silver

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Area of Science:

Materials Science
Nanotechnology
Green Chemistry

Background:

Developing sustainable and cost-effective methods for nanoparticle synthesis is crucial.
Biopolymers offer potential as eco-friendly reducing and stabilizing agents.
Silver nanoparticles have diverse applications, including sensing and catalysis.

Purpose of the Study:

To develop a green, low-cost method for synthesizing silver nanoparticles at room temperature using guargum.
To characterize the synthesized silver nanoparticles (GAg) and investigate their properties.
To evaluate the efficacy of GAg as a Surface Enhanced Raman Spectroscopic (SERS) substrate and as a catalyst for dye degradation.

Main Methods:

Green synthesis of silver nanoparticles using guargum.
Characterization using UV-vis spectroscopy, FTIR, EDS, Raman, XRD, and TEM.
Evaluation of SERS detection for cationic and anionic dyes.
Catalytic degradation studies of Reactive Blue-21, Reactive Red-141, and Rhodamine-6G, including binary mixtures.
Analysis of Total Organic Carbon (TOC) reduction.

Main Results:

Successfully synthesized stable silver nanoparticles (GAg) at room temperature using guargum.
Demonstrated the interaction between guargum functional groups and GAg, enabling SERS activity.
GAg effectively detected both cationic and anionic dyes.
Achieved significant catalytic degradation of three different dye types (copper phthalocyanine, azo, xanthene) and their mixtures.
Observed a substantial reduction in TOC, indicating effective pollutant degradation.

Conclusions:

Guargum is an effective and sustainable agent for green synthesis of silver nanoparticles.
The synthesized GAg nanoparticles are excellent SERS substrates for dye detection.
GAg nanoparticles exhibit potent catalytic activity for the degradation of various organic dyes, offering a promising solution for wastewater treatment.