Wu Zhijie, Ge Shaohui, Zhang Minghui, Li Wei, Tao Keyi
Institute of New Catalytic Materials Science, College of Chemistry and Engineering Research, Center of High-Energy Storage & Conversion (Ministry of Education), Nankai University, Tianjin 300071, China.
J Colloid Interface Sci. 2009 Feb 15;330(2):359-66. doi: 10.1016/j.jcis.2008.10.083. Epub 2008 Dec 9.
Nickel nanoparticles supported on metal oxides were prepared by a modified electroless nickel-plating method. The process and mechanism of electroless plating were studied by changing the active metal (Ag) loading, acidity, and surface area of metal oxides and were characterized by UV-vis spectroscopy, transmission electron microscopy, scanning electron microscopy, and H(2) chemisorption. The results showed that the dispersion of nickel nanoparticles was dependent on the interface reaction between the metal oxide and the plating solution or the active metal and the plating solution. The Ag loading and acidity of the metal oxide mainly affected the interface reaction to change the dispersion of nickel nanoparticles. The use of ultrasonic waves and microwaves and the change of solvents from water to ethylene glycol in the electroless plating could affect the dispersion and size of nickel nanoparticles.
采用改进的化学镀镍方法制备了负载在金属氧化物上的镍纳米颗粒。通过改变活性金属（Ag）负载量、酸度以及金属氧化物的表面积，研究了化学镀的过程和机理，并采用紫外可见光谱、透射电子显微镜、扫描电子显微镜和H₂化学吸附对其进行了表征。结果表明，镍纳米颗粒的分散性取决于金属氧化物与镀液之间或活性金属与镀液之间的界面反应。金属氧化物的Ag负载量和酸度主要影响界面反应，从而改变镍纳米颗粒的分散性。在化学镀中使用超声波和微波以及将溶剂从水改为乙二醇会影响镍纳米颗粒的分散性和尺寸。
