摘要
研究了十六烷基三甲基溴化铵 (CTAB) /正己醇 /水体系的W/O微乳体系中 ,几种主要实验参数对用NaBH4还原氯金酸溶液制得的金纳米粒子大小的影响。实验结果表明 :微乳体系中水与表面活性剂的摩尔比rw 在所研究的范围内对金粒子大小影响不大 ,而氯金酸溶液的浓度对金粒子大小影响较大。通过优化制备条件 ,用两种不同的方法制备了Au/Al2 O3 催化剂 ,并用紫外 可见光谱、透射电镜 (TEM)和X射线衍射(XRD)对其进行表征 。
A variety of synthesis parameters for the preparation of gold nanoparticles by NaBH4 solution reduction in the W/O microemulsion media consisting of Cetyl Trimethyl Ammonium Bromide (CTAB)/n-hexanol/water system was investigated. The results showed that the molar ratio of water to surfactant (r(w)) had nothing to do with the gold particle size, but the concentration of the aqueous gold salt solution had a significant effect on the size of gold particle. Through optimizing the preparation parameters, Au/Al2O3 catalysts were prepared with two different methods, then the catalysts were characterized by ultraviolet-visible spectra, XRD and TEM, and the effect of two different preparation methods on active component gold particle size in the catalysts was studied.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第9期1096-1098,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金 (2 0 2 71 0 1 2 )
福建省科技计划项目 (2 0 0 2H0 2 6)资助
