摘要
提出了一种新型的制备超细空心金属镍粉的方法.通过FESEM,TEM和XRD衍射对该制备方法进行了研究,并考察了有关工艺参数对产物粒径和粒度分布的影响.研究认为,通过在胶核表面发生自催化还原反应,形成金属镍壳,同时胶核发生自分解,最后可得到空心金属镍球.控制反应物浓度和NaOH的配比可得到粒径均匀的镍球;通过调整这两个参数可得到粒度在微米或纳米尺度的空心镍球.
A facile, novel and low-cost method for synthesizing hollow nickel spheres is reported in this paper. The hollow nickel spheres were characterized by field emission scanning electron microscopy, transmission electron microscope and X-ray powder diffraction. And the factors responsible for the control of the size distribution of the hollow spheres were discussed. The hollow nickel spheres was prepared by autocatalyzing the redox reaction around the colloidal particles. The concentration of reaction solution and molar ratio of Ni+{2+} to NaOH are important factors that affect the size distribution of the nickel spheres, and this two processing parameters can be regulated to synthesize micrometer- and nanometer-sized hollow nickel spheres.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期1309-1312,M007,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:50474004)
上海市科委纳米专项基金(批准号:0452nm046)资助.
关键词
空心金属球
微米和纳米级粉末
自催化还原
胶体模板
Hollow metal spheres
Micrometer- and nanometer-sized powder
Autocatalytic reduction
Colloid template
