Feng Songya, Gao Anxin, Ma Zihang, Xu Hongjie, Xue Zhiyong
Institute for Advanced Materials, North China Electric Power University, Beijing 102206, China.
Materials (Basel). 2025 May 15;18(10):2315. doi: 10.3390/ma18102315.
The general polyol methods used for synthesizing copper nanoparticles (CuNPs) usually require high temperatures to ignite the reduction reaction, which leads to the difficulty of controlling the particle size. Herein, a new polyol method for the size-controllable synthesis of CuNPs at low temperatures by adopting high-pressure hydrogen as the reductant is verified. It is proven that hydrogen is capable to reductively produce CuNPs at temperatures as low as 120 °C. The size of the CuNPs can be controlled between 19.29 nm and 140.46 nm by adjusting the hydrogen pressure, the reaction temperature, and duration. An empirical relationship between temperature and particle size is proposed. This work verifies a low-temperature strategy to synthesize nanoparticles with good size-controllability.
用于合成铜纳米颗粒（CuNPs）的一般多元醇方法通常需要高温来引发还原反应，这导致难以控制颗粒尺寸。在此，一种通过采用高压氢气作为还原剂在低温下可控合成CuNPs的新多元醇方法得到了验证。事实证明，氢气能够在低至120℃的温度下还原生成CuNPs。通过调节氢气压力、反应温度和持续时间，CuNPs的尺寸可以控制在19.29nm至140.46nm之间。提出了温度与颗粒尺寸之间的经验关系。这项工作验证了一种合成具有良好尺寸可控性的纳米颗粒的低温策略。
