High-concentration Facile Synthesis of Self-assembled Micronsized Flower Silver Particles by Stainless Steel- Assisted Vitamin C Reduction Method

摘要:

以AgNO3为原料，在不锈钢辅助的条件下，通过Vc还原的方法快速合成了微米花球状Ag。产物的形貌和相结构用扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X 射线粉末衍射（XRD）进行了表征。通过改变反应温度和不锈钢可以获得1~6 μm的片状花球Ag和棒状花球Ag。对花状Ag的形成机理进行了探讨，其花状结构由多个纳米片或纳米棒团聚而成。

Abstract:

Self-assembled micronsized flower silver (Ag) particles were synthesized using AgNO3 as starting material by a stainless steel assisted vitamin C (Vc) reduction method. X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to characterize the phases and the morphologies of the products. The results show that the micronsized flower Ag particles with 1~ 6 μm size can be rapidly and routinely produced on relatively large scales, which are composed of nanoplates or nanorods with the thickness of around 200 nm. The growth process of the micronsized flower Ag particles was investigated and their growth mechanism was proposed. It is revealed that the micronsized flower Ag particles might be assembled from small particles step by step. The presence of stainless steel and temperature plays an important role in determining the geometric shape and the size of micronsized flower Ag particles.