合成和素-银纳米颗粒的表征
Dominik Maršík1, Petter Paulsen Thoresen2, Olga Maťátková1
1Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic.
Molecules (Basel, Switzerland)
|May 25, 2024
概括
这项研究介绍了使用可再生材料素的银纳米颗粒的绿色合成. 由于它们的均尺寸和热特性,这些素修饰的银纳米颗粒显示出生物医学应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 绿色化学 绿色化学
背景情况:
- 对金属纳米颗粒的环保合成至关重要.
- 是可再生资源,具有作为可持续前体的潜力.
- 传统的方法通常涉及恶劣的化学物质和条件.
研究的目的:
- 开发一种强大的绿色合成路径,用于素修饰的银纳米粒子.
- 描述合成的纳米粒子,并评估它们的特性.
- 探索潜在的应用,特别是在生物医学领域.
主要方法:
- 绿色合成使用回收的红素作为减少和封闭剂.
- 在水溶液 (pH 11) 中优化反应条件.
- 使用UV-Vis光谱学,AAS,DLS,TEM,XRD和XPS进行表征.
主要成果:
- 合成了具有高均性的均银纳米粒子 (12-15纳米).
- 获得了高产量 (>0.010 mol L-1) 和最小的前体损失 (0.5-3.9%).
- Ag-O结合证实了素的功能化;纳米颗粒在NIR照射下表现出局部的热效应.
结论:
- 宁是一种可行的可再生剂,用于银纳米粒子合成.
- 开发的方法解决了传统绿色合成的局限性.
- 用素修饰的银纳米颗粒对有针对性的生物医学应用有希望.
更多相关视频
相关概念视频
03:45Formation of Complex Ions
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...