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Plants and microbes assisted selenium nanoparticles: characterization and application.

Husen A, Siddiqi KS - J Nanobiotechnology (2014)

Bottom Line: The Se nanoparticles of varying shape and size may be synthesized from Se salts especially selenite and selenates in presence of reducing agents such as proteins, phenols, alcohols and amines.These biomolecules can be used to reduce Se salts in vitro but the byproducts released in the environment may be hazardous to flora and fauna.Their shape, size, FTIR, UV-vis, Raman spectra, SEM, TEM images and XRD pattern have been analysed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biology, College of Natural and Computational Sciences, University of Gondar, Gondar, Ethiopia. adroot92@yahoo.co.in.

ABSTRACT
Selenium is an essential trace element and is an essential component of many enzymes without which they become inactive. The Se nanoparticles of varying shape and size may be synthesized from Se salts especially selenite and selenates in presence of reducing agents such as proteins, phenols, alcohols and amines. These biomolecules can be used to reduce Se salts in vitro but the byproducts released in the environment may be hazardous to flora and fauna. In this review, therefore, we analysed in depth, the biogenic synthesis of Se nanoparticles, their characterization and transformation into t- Se, m-Se, Se-nanoballs, Se-nanowires and Se-hollow spheres in an innocuous way preventing the environment from pollution. Their shape, size, FTIR, UV-vis, Raman spectra, SEM, TEM images and XRD pattern have been analysed. The weak forces involved in aggregation and transformation of one nano structure into the other have been carefully resolved.

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Se nanoparticle synthesis usingVitis viniferaextract.
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Figure 1: Se nanoparticle synthesis usingVitis viniferaextract.

Mentions: Sharma et al. [30] have characterized Se nanoballs fabricated from V. vinifera by FTIR spectral studies. The spectrum exhibited two sharp absorption peaks at 3420 cm−1 attributed to OH and, the second peak at 1620 cm−1 to C-H vibration of the organic molecules. A distinct peak at 1375 cm−1 has been assigned to phenolic OH. The other peaks of medium intensity are due to –CH3 and OCH3 groups associated with the biopolymers, present in the V. vinifera extract acting as reducing agent and stabilizer for the Se nanoballs. Since lignin is a component of all vegetables, fruits and cell wall, it can be extracted from them and the compounds present in them may be identified. In the present work, phenolic group has been identified which generally acts as reducing agent and, it is oxidised to ketone during the redox process. However, the extract also contains fairly substantial amount of reducing sugars and therefore, they also help in the reduction and formation of Se nanoballs. These authors have given a flow diagram for Se nanoparticles synthesis but it does not reveal the chemical changes which occur as a consequence of redox reactions. We now propose the following scheme Figure 1 based on the general synthetic route.


Plants and microbes assisted selenium nanoparticles: characterization and application.

Husen A, Siddiqi KS - J Nanobiotechnology (2014)

Se nanoparticle synthesis usingVitis viniferaextract.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4274736&req=5

Figure 1: Se nanoparticle synthesis usingVitis viniferaextract.
Mentions: Sharma et al. [30] have characterized Se nanoballs fabricated from V. vinifera by FTIR spectral studies. The spectrum exhibited two sharp absorption peaks at 3420 cm−1 attributed to OH and, the second peak at 1620 cm−1 to C-H vibration of the organic molecules. A distinct peak at 1375 cm−1 has been assigned to phenolic OH. The other peaks of medium intensity are due to –CH3 and OCH3 groups associated with the biopolymers, present in the V. vinifera extract acting as reducing agent and stabilizer for the Se nanoballs. Since lignin is a component of all vegetables, fruits and cell wall, it can be extracted from them and the compounds present in them may be identified. In the present work, phenolic group has been identified which generally acts as reducing agent and, it is oxidised to ketone during the redox process. However, the extract also contains fairly substantial amount of reducing sugars and therefore, they also help in the reduction and formation of Se nanoballs. These authors have given a flow diagram for Se nanoparticles synthesis but it does not reveal the chemical changes which occur as a consequence of redox reactions. We now propose the following scheme Figure 1 based on the general synthetic route.

Bottom Line: The Se nanoparticles of varying shape and size may be synthesized from Se salts especially selenite and selenates in presence of reducing agents such as proteins, phenols, alcohols and amines.These biomolecules can be used to reduce Se salts in vitro but the byproducts released in the environment may be hazardous to flora and fauna.Their shape, size, FTIR, UV-vis, Raman spectra, SEM, TEM images and XRD pattern have been analysed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biology, College of Natural and Computational Sciences, University of Gondar, Gondar, Ethiopia. adroot92@yahoo.co.in.

ABSTRACT
Selenium is an essential trace element and is an essential component of many enzymes without which they become inactive. The Se nanoparticles of varying shape and size may be synthesized from Se salts especially selenite and selenates in presence of reducing agents such as proteins, phenols, alcohols and amines. These biomolecules can be used to reduce Se salts in vitro but the byproducts released in the environment may be hazardous to flora and fauna. In this review, therefore, we analysed in depth, the biogenic synthesis of Se nanoparticles, their characterization and transformation into t- Se, m-Se, Se-nanoballs, Se-nanowires and Se-hollow spheres in an innocuous way preventing the environment from pollution. Their shape, size, FTIR, UV-vis, Raman spectra, SEM, TEM images and XRD pattern have been analysed. The weak forces involved in aggregation and transformation of one nano structure into the other have been carefully resolved.

Show MeSH
Related in: MedlinePlus