Tseng Kuo-Hsiung, Lin Zih-Yuan, Chung Meng-Yun, Tien Der-Chi, Stobinski Leszek
Department of Electrical Engineering, National Taipei University of Technology Taiwan Republic of China
Materials Chemistry, Warsaw University of Technology Warynskiego 1 00-645 Warsaw Poland.
RSC Adv. 2020 Aug 17;10(50):30169-30175. doi: 10.1039/d0ra04048g. eCollection 2020 Aug 10.
This study employed the electrical spark discharge method to prepare platinum iodide nanocolloids at normal temperature and pressure. Wires composed of 99.5% platinum were applied as the electrodes, and 250 ppm liquid iodine was employed as the dielectric fluid. An electric discharge machine was applied to generate cyclic direct current pulse power between the electrodes. Five sets of turn-on and turn-off time ( - ) parameters, namely 10-10, 30-30, 50-50, 70-70, and 90-90 μs, were implemented to identify the optimal nanocolloid preparation conditions. An ultraviolet-visible spectroscope, a Zetasizer, and a transmission electron microscope were used to examine the nanocolloids' properties. The results revealed that the - parameter set of 10-10 μs was the most ideal setting for platinum iodide nanocolloid preparation. With this parameter set, the characteristic wavelengths of the nanocolloid were 285 and 350 nm, respectively; its absorbance values were 0.481 and 0.425, respectively; and its zeta potential and particle size were -30.3 mV and 61.88 nm, respectively. This parameter set yielded maximized absorbance, satisfactory suspension stability, and minimized nanoparticle sizes for the nanocolloid.
本研究采用电火花放电法在常温常压下制备碘化铂纳米胶体。以99.5%的铂制成的金属丝作为电极，以250 ppm的液态碘作为介电液。使用电火花加工机在电极之间产生周期性直流脉冲功率。实施了五组接通和关断时间（-）参数，即10 - 10、30 - 30、50 - 50、70 - 70和90 - 90 μs，以确定最佳的纳米胶体制备条件。使用紫外可见光谱仪、Zeta电位仪和透射电子显微镜来检测纳米胶体的性质。结果表明，10 - 10 μs的参数组是制备碘化铂纳米胶体的最理想设置。在此参数组下，纳米胶体的特征波长分别为285和350 nm；其吸光度值分别为0.481和0.425；其zeta电位和粒径分别为-30.3 mV和61.88 nm。该参数组使纳米胶体的吸光度最大化、悬浮稳定性令人满意且纳米颗粒尺寸最小化。
