The rare-earth metal Gd plays an important role in the energy, information, and national defence fields due to its special optical, electrical, magnetic, and catalytic properties. In this study, Gd was purified by direct current (DC) arc plasma, and Gd₂O₃ nanoparticles were prepared via an integration method using purified Gd. The effects of arc current, melting time, gas pressure, and atmosphere on the purification of Gd by DC arc plasma were investigated. With an increase in the arc current and melting time, the rate of removal of impurities from Gd enhances. Moreover, Gd melting was conducted by H₂–Ar arc plasma, which improves the impurity removal rate by increasing the H₂ content. High thermal conductivity and chemical activity of the activated H atoms generated by the dissociation of H₂ are the main reasons for the significant improvement in the impurity removal rate. The mechanism of Gd purification was analysed based on the above-mentioned experimental results. The as-synthesised Gd₂O₃ nanoparticles have a uniform spherical structure (average diameter of 32.7 nm), appropriate dispersibility, and high purity. This study provides a new strategy for the integrated purification of metals and preparation of metal/metal-based nanomaterials by DC arc plasma.

稀土金属Gd由于其特殊的光、电、磁和催化性能，在能源、信息和国防领域发挥着重要作用。在本研究中，Gd 通过直流 (DC) 电弧等离子体纯化，Gd ₂ O ₃纳米颗粒通过使用纯化 Gd 的集成方法制备。研究了电弧电流、熔化时间、气体压力和气氛对直流电弧等离子体净化Gd的影响。随着电弧电流和熔化时间的增加，从Gd中去除杂质的速率提高。此外，Gd 熔化是通过 H ₂ -Ar 电弧等离子体进行的，通过增加 H ₂来提高杂质去除率。内容。H ₂解离产生的活化H原子的高热导率和化学活性是杂质去除率显着提高的主要原因。基于上述实验结果分析了Gd纯化的机理。合成的Gd ₂ O ₃纳米颗粒具有均匀的球形结构（平均直径为32.7 nm）、适当的分散性和高纯度。该研究为直流电弧等离子体金属的综合纯化和金属/金属基纳米材料的制备提供了新的策略。