Valeska M Scuro, Augusto C Dotta Filho, Daniel Rapachi, Ana C Mazzocato, Marcos A Gelesky, Flávio A Pavan
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引用次数: 0
摘要
利用巴西潘帕草原的一种入侵禾草Eragrostis plana Nees的生物质合成了新型银纳米颗粒（AgNPs）。以该提取物为银离子还原剂和稳定剂，一步法合成了AgNPs。结果表明，AgNPs胶体溶液在410 nm处具有表面等离子体共振（SPR）带。通过振动分析，他们发现提取物中存在的OH、NH、CONH2、COC、COOH和CO与还原Ag+离子有关。合成的纳米颗粒呈结晶状，形貌分析表明制备的AgNPs具有不同的形状，平均直径为23±8 nm。生物合成的AgNPs对甲苯胺蓝（TB）具有较高的催化活性。在NaBH4存在的情况下，AgNPs在25°C下仅反应5分钟就能完全减少TB。
Novel biosynthesis of silver nanoparticles catalytically active using extract of non- native species (Eragrostis plana Nees) of Brazilian Pampa.
Novel silver nanoparticles (AgNPs) were synthesized using biomass from Eragrostis plana Nees, commonly known as Tough lovegrass, an invasive grass species in the Brazilian Pampa. AgNPs were synthesized in a one-step synthesis using the extract as a reducing agent for Ag+ ions and stabilizing agent. The results showed that the colloidal solution of AgNPs had a surface plasmon resonance (SPR) band at 410 nm. Through vibrational analysis, they showed that the OH, NH, CONH2, COC, COOH, and CO present in the extract were associated with reducing Ag+ ions. The synthesized nanoparticles were crystalline and, through morphological analysis, showed that the AgNPs produced had different shapes, with an average diameter of 23 ± 8 nm. The biosynthesized AgNPs exhibited high catalytic activity for reducing Toluidine blue (TB). The total reduction of TB with AgNPs in the presence of NaBH4 at 25 °C occurred after only 5 min of reaction.
期刊介绍：
The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence.
Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.
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