以硝酸银为前驱体,聚乙烯吡咯烷酮为还原剂和保护剂,制备出了花朵状纳米银.利用紫外可见吸收光谱(UV -Vis)、扫描电子显微镜(SEM)、X 射线衍射仪(XRD)及傅里叶红外光谱仪(FT -IR)等对其进行了分析表征.研究表明,制得的 Ag 纳米颗粒属于面心立方结构,随着反应温度的升高,Ag 纳米颗粒形貌由类球形到立方体形、薄片形、花朵形转变,溶液中的 Ag+会得到 PVP分子内酰胺基中 N 的给电子,使 Ag+获得电子而转化为 Ag.
The flower-like silver nanoparticles were synthesized using silver nitrate (AgNO3 ) as precursor and polyvinyl pyrrolidone (PVP) as reductive and protective agent.Surface characteristics of the silver nanoparticles were analyzed by UV-Vis absorption spectroscopy ( UV-vis), Scanning Electron Microscope ( SEM), X-ray Diffraction (XRD),Fourier transform infrared (FT-IR).The result showed that silver nanoparticles belong to face -centered cubic structure and with the temperature increasing ,the form will transform from spherical to cubic and then to slice shape , flower-like silver nanoparticle.Ag+ in the solution would be reduced to Ag by amino N in PVP .
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