Nano and mesosized selenium and its synthesis using the ascorbic acid route

•Elemental selenium particles.•Reaction of sodium selenite and ascorbic acid.•Adjusting of pH, HCl addition.•XRD, Uv-Vis, SEM and TEM characterization.•Particles, nanoparticles and networks of Se. Elemental selenium particles have undergone extensive research in recent years. They are interesting fo...

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Bibliographic Details
Published in:Journal of non-crystalline solids Vol. 616; p. 122462
Main Authors: Štefanková, Daniela, Skrbek, Kryštof, Pižl, Martin, Bartůněk, Vilém
Format: Journal Article
Language:English
Published: Elsevier B.V 15.09.2023
Subjects:
Ascorbic acid
Mesoparticles
Nanoparticles
Selenium nanoparticles
Spherical
Nanoparticles
Spherical
Ascorbic acid
Mesoparticles
Selenium nanoparticles
ISSN:0022-3093, 1873-4812
Online Access:Get full text
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Summary:•Elemental selenium particles.•Reaction of sodium selenite and ascorbic acid.•Adjusting of pH, HCl addition.•XRD, Uv-Vis, SEM and TEM characterization.•Particles, nanoparticles and networks of Se. Elemental selenium particles have undergone extensive research in recent years. They are interesting for their catalytic, antimicrobial, and many other properties which make them potentially useful in various applications. Despite the widespread research, there are still some information blank spots in the preparation of these nano- and mesosized objects by using a simple reduction reaction between sodium selenite and ascorbic acid without any stabilizing agents which could unpleasantly affect their natural characteristics. This work aimed to prepare these particles and characterize them in the dependence on the reaction mixture composition and pH. Firstly, the reaction system was monitored, in detail, by UV–VIS spectroscopy and a possible deviation in the detection of individual spectral peaks was detected. Furthermore, it is observable that the reaction becomes faster when lowering pH of the reaction mixture. The prepared particles were well-purified and characterized by X-ray powder diffraction, scanning electron, and transmission electron microscopy, where their morphology was observed. The size distribution of the particles was measured by dynamic light scattering and was ranging between 65 and 159 nm. Finally, the dependence of the sample forms on storage time was monitored. It has been shown that the individual objects maintain their primary structure and form, when stored in water, on contrary, dried particles undertook a significant structure and color-change, while forming crystalline polymorphs of gray selenium.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2023.122462