Abstract

In this study, silver and gold nanoparticles were synthesized by using Syzygium aromaticum bud extract and reaction conditions were optimized. SPR band for silver nanoparticle (CAgNP) and for gold nanoparticle (CAuNP) was observed at 427 nm and 530 nm, respectively. The presence of phytochemical on the nanoparticle as capping agent in confirmed by Fourier transform infrared (FT-IR). Energy dispersive X-ray spectroscopy confirms the elemental composition of CAgNP and CAuNP. Zeta Potential measurements revealed that the surfaces of the nanoparticles were negatively charged. Transmission electron microscopy and dynamic light scattering experiment indicated that particles were spherical and moderately dispersed. The CAgNPs have shown sensitivity to detect Hg(II) whereas CAuNPs could detect Cr(III) and Pb(II) ions in aqueous solution. The metal ion detection was monitored by UV–Visible spectroscopy. The minimum detection limit for Hg(II) by using CAgNPs is 10 µM and that of Cr(III) and Pb(II) is 0.25 mM and 1 mM, respectively.

摘要

在这项研究中，银和金纳米粒子是用丁香合成的优化了芽提取物和反应条件。分别在 427 nm 和 530 nm 处观察到银纳米颗粒 (CAgNP) 和金纳米颗粒 (CAuNP) 的 SPR 带。通过傅里叶变换红外 (FT-IR) 证实纳米颗粒上存在植物化学物质作为封端剂。能量色散 X 射线光谱证实了 CAgNP 和 CAuNP 的元素组成。Zeta 电位测量表明纳米颗粒的表面带负电。透射电镜和动态光散射实验表明颗粒呈球形且分散适中。CAgNPs 显示出检测 Hg(II) 的敏感性，而 CAuNPs 可以检测水溶液中的 Cr(III) 和 Pb(II) 离子。金属离子检测由紫外-可见光谱监测。