Synthesis of noble metal/carbon nanotube composites in supercritical methanol.
A simple and efficient route has been employed to deposit noble metal nanoparticles (Pt, Ru, Pt-Ru, Rh, Ru-Sn) onto carbon nanotubes (CNTs) in supercritical methanol solution. In this method, the inorganic metallic salts acted as metal precursors, and methanol as solvent as well as reductant for the precursors. The as-prepared nanocomposites were structurally and morphologically characterized by X-ray diffraction spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy, and X-ray photoelectron spectroscopy analyses. It was demonstrated that the CNTs were decorated by crystalline metal nanoparticles with uniform sizes and a narrow particle size distribution. The size and loading content of the nanoparticles on CNTs could be tuned by manipulating reaction parameters. Furthermore, the formation mechanism of the composites was also discussed.
Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P R China.
Zhenyu
Z
Sun
Lei
L
Fu
Zhimin
Z
Liu
Buxing
B
Han
Yunqi
Y
Liu
Jimin
J
Du
D025924:Chromatography, Supercritical Fluid / Q000379:methods; D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D000432:Methanol; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012996:Solutions
D008670:Metals; D037742:Nanotubes, Carbon; D012996:Solutions; D000432:Methanol