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AuthorBHAGYARAJ, SNEHA
AuthorKRUPA, IGOR
Available date2020-10-22T06:59:12Z
Publication Date2020
Publication NameQatar University Annual Research Forum & Exhibition 2020
CitationBHAGYARAJ S., KRUPA I., "Alginate-mediated synthesis of hetero-shaped silver nanoparticles and their hydrogen peroxide sensing ability", Qatar University Annual Research Forum and Exhibition (QUARFE 2020), Doha, 2020, https://doi.org/10.29117/quarfe.2020.0042
URIhttps://doi.org/10.29117/quarfe.2020.0042
URIhttp://hdl.handle.net/10576/16577
AbstractSilver nanoparticles have been the focus of extensive research for many decades due to their unique physical, chemical and electrical properties. Introducing new environmentally benign methods for the synthesis of silver nanoparticles is of great interest in the research community. In this work we propose a new method for the simple synthesis of stable heterostructured biopolymer (sodium alginate)-capped silver nanoparticles (Ag-NPs) based on green chemistry.The as-prepared nanoparticles were characterized using the ultraviolet–visible (UV–Vis) absorption spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and Dynamic light scattering (DLS) techniques. The results showed that the as-prepared Ag-NPs have a heterostructured morphology with particle size in the range 30 ± 18 – 60 ± 25 nm, showing a zeta potential of -62 mV. The silver nanoparticle formation was confirmed from UV-Vis spectra showing 424 nm as maximum absorption. The particle size and crystallinity of the as- synthesized nanoparticles were analyzed using TEM and XRD measurements respectively. FTIR spectra confirmed the presence of alginate as capping agent to stabilize the nanoparticles. The Ag-NPs also showed excellent sensing capability, with a linear response to hydrogen peroxide spanning a wide range of concentrations from 10-1 – 10-7 M, which indicates their high potential for water treatment applications, such as pollution detection and nanofiltration composites.
Languageen
PublisherQatar University Press
SubjectAlginate
SubjectSynthesis
SubjectSilver nanoparticles
SubjectHeterostructure
SubjectSensing
TitleAlginate-mediated synthesis of hetero-shaped silver nanoparticles and their hydrogen peroxide sensing ability
TypePoster


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