Cuprous oxide nanoparticles: preparation and evaluation of antifouling activity

There are few methods to obtain uniform and well dispersed cuprous oxide nanoparticles, which limits its application widely. In this research, an improved method to prepare nanoparticles was introduced. Cuprous oxides were prepared by the reduction of cupric nitrate, with hydrazine hydrate as a reductant in the presence of glucose. The nanoparticles formed have the characteristics of small particle size and uniform distribution. The crystalline structure and morphological characteristics were analyzed by XRD and TEM respectively. The result showed they were pure sphere polycrystal. The particle size is about 9nm. Subsequently, the antifouling activity was tested in detail through comparative experiments. The results indicated that the effective concentration of nanoparticles was obviously lower than ordinary cuprous oxide.

目前鲜有可制备形貌均匀且分散性优异的氧化亚铜纳米颗粒（cuprous oxide nanoparticles）的方法，这严重制约了其广泛应用。本研究提出了一种改良的纳米颗粒制备工艺：以葡萄糖为分散稳定剂，以水合肼（hydrazine hydrate）为还原剂，通过硝酸铜（cupric nitrate）的还原反应合成氧化亚铜纳米颗粒。所制备的纳米颗粒具有粒径小、分布均匀的特点。分别采用X射线衍射（X-ray Diffraction, XRD）与透射电子显微镜（Transmission Electron Microscopy, TEM）对产物的晶体结构与形貌特征进行了表征分析，结果表明所得产物为纯相球形多晶结构，平均粒径约为9纳米。随后，通过对照实验详细评估了该纳米颗粒的防污活性，实验结果显示，其有效作用浓度显著低于普通氧化亚铜材料。