Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume -, Issue -, Pages -Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.21577/0103-5053.20220141
Keywords
green synthesis; alternative routes; plant extract; Amazonian resources
Categories
Funding
- CAPES (Higher Education Personnel Improvement Coordination)
- CNPq (National Council for Scientific Development) [404810/2021-7]
- FAPEAM (Amazonas State Research Support Foundation) [062.00875/2020, 01.02.016301.03332/2021-12, 062.00876/2020]
- FAPESP (Sao Paulo State Research Support Foundation) [2011/50318, 06170-1/2019]
- FAPEAM [POSGRAD 2020/2021]
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This study investigated the production of silver nanoparticles (AgNPs) mediated by aqueous extracts of Tucuma pulp. The results showed that alkaline reaction media produced the most intense and well-defined bands in the electronic spectra. Additionally, increasing the temperature of the reaction media enhanced the surface plasmon resonance band of AgNPs but also increased the polydispersivity of the nanoparticles.
Tucuma (Astrocaryum aculeatum) pulp presents a large number of secondary metabolites that can mediate the synthesis of metallic nanoparticles through a greener and more sustainable synthetic route than traditional ones. This study investigated the production of silver nanoparticles (AgNPs) mediated by aqueous extracts of tucuma pulp assessing different parameters, such as temperature, concentration of extract, and pH values of the reaction media. The alkaline reaction media produced the most intense and well-defined bands around 400 nm in the electronic spectra, indicating the formation of AgNPs in the three concentrations of tucuma pulp evaluated. The increase in the temperature of the reaction media also enhanced the surface plasmon resonance band of AgNPs but it increased the polydispersivity of produced nanoparticles according to the dynamic light scattering (DLS) and transmission electron microscopy (TEM) data. Zeta potential results indicated moderate stability of the AgNPs (close to -30 mV). Antimicrobial assessment of the colloidal metal particles indicated microbicide activity against the Gram-negative Escherichia coli bacterium.
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