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采用硝酸银(AgNO3)为前躯体,抗坏血酸(Vc)为还原剂,通过一条绿色途径合成了Ag纳米粒子,其粒径大小分布范围窄。对产物进行X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外-可见分光光度(UV-Vis)等多种手段进行表征。以吡啶(Py)作为探针分子进行表面增强拉曼散射效应的测定,具有很好的增强效果。结果表明,光谱的检测限为10-10mol·L-1,且随探针分子浓度下降,拉曼信号变化趋势很稳定,为后续定量分析打下基础。
Adopting AgNO3 as precursor and ascorbic acid (Vc) as reductant, Ag nanoparticles were synthesized by a green route, and their size distribution range was narrow. The products were characterized by XRD, SEM, TEM and UV-Vis. Pyridine (Py) as a probe molecule for the surface-enhanced Raman scattering effect measurement, has a very good enhancement effect. The results showed that the detection limit of the spectra was 10-10mol·L-1. With the decrease of the concentration of the probe molecules, the change trend of Raman signal was stable, which laid the foundation for the subsequent quantitative analysis.