Reverberi Andrea Pietro, Salerno Marco, Lauciello Simone, Fabiano Bruno
DCCI-Department of Chemistry and Industrial Chemistry, via Dodecaneso 31, Genova 16145, Italy.
Nanophysics Department, Istituto Italiano di Tecnologia, via Morego 30, Genova 16163, Italy.
Materials (Basel). 2016 Sep 29;9(10):809. doi: 10.3390/ma9100809.
Copper nanoparticles have been synthesized in ethylene glycol (EG) using copper sulphate as a precursor and vanadium sulfate as an atypical reductant being active at room temperature. We have described a technique for a relatively simple preparation of such a reagent, which has been electrolytically produced without using standard procedures requiring an inert atmosphere and a mercury cathode. Several stabilizing agents have been tested and cationic capping agents have been discarded owing to the formation of complex compounds with copper ions leading to insoluble phases contaminating the metallic nanoparticles. The elemental copper nanoparticles, stabilized with polyvinylpyrrolidone (PVP) and sodium dodecyl sulphate (SDS), have been characterized for composition by energy dispersive X-ray spectroscopy (EDS), and for size by dynamic light scattering (DLS), and transmission electron microscopy (TEM), giving a size distribution in the range of 40-50 nm for both stabilizing agents. From a methodological point of view, the process described here may represent an alternative to other wet-chemical techniques for metal nanoparticle synthesis in non-aqueous media based on conventional organic or inorganic reductants.
已使用硫酸铜作为前驱体、硫酸钒作为在室温下具有活性的非典型还原剂，在乙二醇（EG）中合成了铜纳米颗粒。我们描述了一种相对简单的制备这种试剂的技术，该试剂是通过电解生产的，无需使用需要惰性气氛和汞阴极的标准程序。已经测试了几种稳定剂，由于与铜离子形成络合物导致形成不溶性相污染金属纳米颗粒，阳离子封端剂已被舍弃。用聚乙烯吡咯烷酮（PVP）和十二烷基硫酸钠（SDS）稳定的元素铜纳米颗粒，通过能量色散X射线光谱（EDS）对其成分进行了表征，通过动态光散射（DLS）和透射电子显微镜（TEM）对其尺寸进行了表征，两种稳定剂的尺寸分布范围均为40-50nm。从方法学的角度来看，这里描述的过程可能代表了基于传统有机或无机还原剂的非水介质中金属纳米颗粒合成的其他湿化学技术的替代方法。
