Ag纳米颗粒的快速制备及其性能研究

Rapid Synthesis and Properties of Silver Nanoparticles

以黄药子提取液为还原剂和表面活性剂,快速制备出Ag纳米颗粒。通过紫外-可见分光光度计(UV-Vis)、透射电子显微镜(TEM)和X-射线衍射(XRD)对Ag纳米颗粒的形貌、成分和微观结构进行表征、分析。结果表明,Ag纳米颗粒为类球形,粒径为20.6 nm。说明了黄药子提取液具有良好的还原性。以合成的Ag纳米颗粒作为催化剂可以在10 min内将4-硝基苯酚(4-NP)完全降解,4-NP降解的速率常数可以通过Ag纳米颗粒的添加量来调节,最大值为0.286 min^-1,说明合成的Ag纳米颗粒具有良好的光催化活性。

Silver nanoparticles(Ag NPs)were synthesized using the Airpotato Yam Rhizome extracts as reducing and capping agent.By means of the ultraviolet-visible(UV-Vis)spectrophotometer,transmission electron microscope(TEM),and X-ray diffraction(XRD)analyses,the morphology,composition and microstructure of obtained Ag NPs were characterized.It can be found that sphere-like and mono-disperse Ag NPs with a small size of 20.6 nm are prepared without any impurities,illustrating the excellent reducing and capping capacities of Airpotato Yam Rhizome extracts.Using these Ag NPs as photocatalysts,4-NP can be fast removed within 10 min.The rate constant for the 4-NP degradation can be adjusted by the addition of Ag NPs and shows a maximum value of 0.286 min^-1,indicating the superior photocatalytic activity of as-synthesized Ag NPs.