A COMPARATIVE ASSESSMENT OF AU NANOPARTICLES SYNTHESIZED VIA GREENER PATHWAYS USING NATURAL HYDROCOLLOIDS

1 IBRAHIM Mayza
Co-authors:
1 PADIL Vinod V.T. 1 ČERNÍK Miroslav
Institution:
1 Institute for Nanomaterials, Advanced Technology and Innovation, Technical University of Liberec, Studentská 1402/2, Liberec 1, Czech Republic
Conference:
10th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 17th - 19th 2018
Proceedings:
Proceedings 10th International Conference on Nanomaterials - Research & Application
Pages:
266-271
ISBN:
978-80-87294-89-5
ISSN:
2694-930X
Published:
28th February 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
9 views / 1 download
Abstract

This paper presents the synthesis and stabilization of Gold nanoparticles (Au NPs) using five different hydrocolloids [Tragacanth (Tg), Karaya (Kg), Guar (Gg), Carrageenan (Cg), and Xanthan (Xg)] via greener pathways. The particle size, morphology, stabilization characteristics and catalytic efficiencies of the synthesized Au NPs were analyzed using spectroscopic and microscopic techniques. The Gg stabilized Au NPs was extremely stable (particle size 8.0 ± 1 nm) at 4°C for a period up to three months as compared to other Au NPs synthesized and stabilized via other polysaccharides. However, zeta potential and UV-vis analysis of Au NPs produced by Tg, Kg, Gg, Cg and Xg did not show much variation in magnitudes during the tested periods (0 to 90 days). The catalytic performance of hydrocolloid stabilized Au NPs were also evaluated and compared their kinetics reaction rates, and stability for the degradation of 4-Nitrophenol (p-NP) to 4-Amino phenol (p-AP). The reduction of p-NP follows the pseudo-first order.The highest kinetic rate value is found to be 10.6 x 10-3 s-1 for Au Guar composites (5.1 x 10-6 mM).

Keywords: Hydrocolloids, Au NP, green synthesis, catalysis
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