| Autor: |
SORESCU, Ana-Alexandra, NUTA, Alexandrina, ION, Rodica-Mariana, IANCU, Lorena, NISTOR, Cristina Lavinia |
| Předmět: |
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| Zdroj: |
Bulletin of Romanian Chemical Engineering Society; 2018, Vol. 5 Issue 2, p88-98, 11p |
| Abstrakt: |
In recent years there has been a constant progress regarding the methods used for the synthesis of different shaped metallic nanoparticles, focusing especially on noble metal nanoparticles such as silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) due to their numerous applications in different scientific fields. Different methods are used for the preparation of both AgNPs and AuNPs, involving both chemical and green routes. The present paper describes the green synthesis of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) using aqueous extracts of pale-green and purple Kohlrabi peel (Brassica Oleracea Gongylodes Group), a vegetable with numerous health benefits. The potential capacity of the two species of Kohlrabi to bioreduce Ag+ to Ag0 was investigated by means of different spectral techniques (e.g.: FTIR, UVVis, absorption). UV-Vis spectra were recorded for both AgNPs and AuNPs at different times (0, 30, 60, 120 minutes and 24 h after synthesis) and the results are specific for both metallic nanoparticles. The size of the biosynthesized metallic nanoparticles was determined by means of diffraction light scattering measurements (DLS) and the results are in the nanometer range. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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