The synthesis mechanism of cuprous oxide (Cu₂O) nanoparticles by atmospheric-pressure plasma electrolysis was investigated experimentally. In the plasma electrolysis system, a helium plasma in contact with an NaCl electrolyte was used as the cathode, while a copper plate which was partly immersed into the electrolyte was used as the counter electrode. X-ray powder diffraction, field-emission scanning electron microscopy, and transmission electron microscopy were used for characterizing the synthesized products. The results indicate that the Cl⁻ concentration and the pH value of the electrolyte dominate the synthesis of Cu₂O nanoparticles. The reaction between CuCl produced via the anodic dissolution of Cu and OH⁻ produced by plasma irradiation is responsible for the formation of Cu₂O. The comparison between the plasma and conventional electrolysis has also been carried out, since the anodic dissolution of the Cu plate and the production of OH⁻ are also available in the conventional electrolysis. As a result, we also observed the synthesis of Cu₂O nanoparticles by the conventional electrolysis. However, we observed the differences between the plasma and conventional electrolysis in the synthesis rate, the minimum NaCl concentration, and the size and the shape of synthesized nanoparticles.

实验研究了常压等离子体电解合成氧化亚铜（Cu ₂ O）纳米粒子的机理。在等离子体电解系统中，将与NaCl电解质接触的氦等离子体用作阴极，而将部分浸入电解质中的铜板用作对电极。X射线粉末衍射，场发射扫描电子显微镜和透射电子显微镜用于表征合成产物。结果表明，在氯^-浓度和电解液的pH值支配Cu的合成₂ Ó纳米颗粒。的CuCl之间的反应通过Cu和OH的阳极溶解而产生^-由等离子体辐照产生负责在该Cu ₂ O.等离子体和常规电解之间的比较也被执行，因为Cu板的阳极溶解和生产的OH ^-也可在常规电解可用。结果，我们还观察到通过常规电解合成Cu ₂ O纳米颗粒。但是，我们观察到等离子体和常规电解在合成速率，最小NaCl浓度以及合成纳米颗粒的大小和形状方面存在差异。