Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 18 No. 1 January 2008|
（1. College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;2. School of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, China）
Abstract:The nickel nanoparticles with different sizes and spherical shape were prepared by the reduction of nickel sulfate with sodium borohydride in the water-in-oil emulsions of water/SDBS(sodium dodecylbenzene sulfonate)/n-pentanol/n-heptane. The effects of aging time, molar ratio of water to SDBS(R) and the concentration of nickel sulfate on the size of particles were studied. The samples were characterized by transmission electron microscopy(TEM) and inductively coupled plasma spectrometry(ICP). The results show that the average particle size changes from 20 to 40 nm by adjusting aging time (15−30 min) and R (9−11.5). The concentration of nickel sulfate of 1.0 mol/L is the favorite condition.
Key words: W/O emulsions; SDBS; nickel nanoparticles