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Parameters and properties for the preparation of Cu nanocolloids containing polyvinyl alcohol using the electrical spark discharge method
Nanomaterials and Nanotechnology ( IF 3.7 ) Pub Date : 2021-08-09 , DOI: 10.1177/18479804211035190
Kuo-Hsiung Tseng, Han-Chiao Ke, Hsueh-Chien Ku

Through the use of an electric discharge machine, this study performed the electrical spark discharge method in deionised water under normal temperature and pressure for Cu nanocolloid (CuNC) preparation. The CuNCs had a zeta potential of 12.3 mV, indicating poor suspension stability. The suspension stability was effectively increased (zeta potential 32.5 mV) through the addition of polyvinyl alcohol (PVA) to form PVA-containing CuNCs PVA/CuNCs. Next, the following pulse-width modulation (Ton:Toff) parameters were tested to determine the optimal setting for PVA/CuNC preparation: 10:10, 30:30, 50:50, 70:70 and 90:90 µs. The optimal preparation parameter was then determined according to the absorbance, zeta potential and size distribution results. Finally, the surface properties and crystal structure of the PVA/CuNCs were characterised through transmission electron microscopy (TEM) and X-ray diffraction (XRD). When the Ton:Toff was set to 30:30 µs, preparation efficiency was optimal, as was suspension stability, as indicated by the absorbance value (0.534), zeta potential (32.5 mV) and size distribution (85.47 nm). Transmission electron microscopy revealed that Cu nanoparticles that were more dispersed in the PVA/CuNCs had a diameter smaller than 10 nm and a crystal line width of 0.2028 nm. X-ray diffraction showed that the PVA/CuNCs contained intact Cu crystal structures.



中文翻译:

电火花放电法制备含聚乙烯醇的Cu纳米胶体的参数和性能

本研究通过使用放电机,在常温常压下在去离子水中进行电火花放电法制备铜纳米胶体(CuNC)。CuNCs 的 zeta 电位为 12.3 mV,表明悬浮稳定性较差。通过加入聚乙烯醇 (PVA) 形成含 PVA 的 CuNCs PVA/CuNCs,悬浮液稳定性得到有效提高(zeta 电位 32.5 mV)。接下来,进行以下脉宽调制(T on :T off) 参数进行测试以确定 PVA/CuNC 制备的最佳设置:10:10、30:30、50:50、70:70 和 90:90 µs。然后根据吸光度、zeta 电位和尺寸分布结果确定最佳制备参数。最后,通过透射电子显微镜 (TEM) 和 X 射线衍射 (XRD) 表征了 PVA/CuNCs 的表面性质和晶体结构。当 T on :T off设置为 30:30 µs,制备效率最佳,悬浮稳定性也最佳,如吸光度值 (0.534)、zeta 电位 (32.5 mV) 和尺寸分布 (85.47 nm) 所示。透射电子显微镜显示,更分散在 PVA/CuNCs 中的 Cu 纳米颗粒的直径小于 10 nm,结晶线宽度为 0.2028 nm。X 射线衍射表明 PVA/CuNCs 含有完整的 Cu 晶体结构。

更新日期:2021-08-09
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