关键词: 棒状, 丁二酮肟镍, 制备, 因素

Abstract: Rod-like nickel dimethylglyoximate [Ni(dmg)2] particles were prepared from aqueous solution in this work. The prepared samples were characterized by XRD and UV-Vis absorption spectrometry, and their morphology was observed by optical microscope and SEM. The influential factors including pH, temperature, ultrasonification and surfactant were investigated. The experimental results show that the diameters and lengths of Ni(dmg)2 rods decrease obviously with increasing pH from 5.0 to 9.0, but slightly increase at the pH value of 10.5. With the rise of temperature, the diameter of Ni(dmg)2 becomes wider and the length longer. Ultrasonification makes both diameter and length of Ni(dmg)2 decrease markedly. The dimensions of particles become more unifrom when surfactants are added. Ionic surfactants have little influence on the size of Ni(dmg)2 rod, while neutral polyethylene glycol (PEG-1000) leads to the rod length longer. By controlling appropriate preparation conditions, the dimensions of rod-like Ni(dmg)2 can be adjusted from the scale of nanometer to micrometer.

Key words: rod, nickel dimethylglyoximate, preparation, factors