纳米银的绿色合成及其光谱性质

Оleksandra Berezhnytska, O. Rohovtsov, O. Chyhyrynets, Denys Snihur
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引用次数: 0

摘要

以芦荟或洋甘菊提取物为还原剂,采用化学缩合法合成球形纳米银。根据提取物的种类和浓度的不同,通过调整起始试剂的比例,AgNpcs的大小在7 ~ 50 nm之间变化。这些提取物由于其成分中存在羰基化合物,特别是有机酸而表现出还原性。结果表明,调节浓度和合成条件可以控制颗粒大小。合成条件的改变会影响表面等离子体共振带的位置,从而影响所研究系统的光学性质。已经证明,合成的银纳米颗粒不需要额外的稳定。只有当浓度和加热时间显著增加时,才会发生团聚过程。
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GREEN SYNTHESIS OF SILVER NANOPARTICLES AND THEIR SPECTRAL PROPERTIES
Spherical silver nanoparticles were synthesized by the chemical condensation method using aloe vera or chamomile extracts as a reducing agent. Depending on the type of extracts and its concentration, the size of AgNpcs varied from 7 to 50 nm by simply adjusting the ratio of the starting reagents. These extracts show reducing properties due to the presence of carbonyl compounds in their composition, in particular organic acids. It is shown that regu­lation of concentrations and synthesis conditions allows control of particle size. A change in the synthesis conditions affects the position of the surface plasmon resonance band, and therefore the optical properties of the studied systems. It has been proven that the synthesized silver nanoparticles do not require additional stabilization. Agglomeration processes occur only with a significant increase in concentration and heating time.
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