Deposition of metal nanoparticles on carbon nanotubes via hexane modified water-in-CO2 microemulsion at room temperature.
Carbon nanotube-supported metallic nanoparticles (Pd, Rh, and bimetallic Pd-Rh) with diameters in the range 2-10 nm can be synthesized by hydrogen reduction of metal ions dissolved in the water core of a CO2 microemulsion in liquid CO2 at room temperature. The microemulsion is stabilized by sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and dissolved in liquid CO2 with the aid of hexane as a modifier. The metal nanoparticles synthesized in the microemulsion can be deposited on surfaces of multi-walled carbon nanotubes (MWCNTs) by stirring in the liquid CO2 phase. This simple method produces uniformly distributed metal nanoparticles on surfaces of the MWCNTs with high yields. The carbon nanotube-supported Pd/Rh bimetallic nanoparticles exhibit high catalytic activities for hydrogenation of aromatic compounds and can be reused without losing catalytic activity.
Wang
Joanna Shaofen
JS
Department of Chemistry, University of Idaho, Moscow 83844, USA.
Pan
Horng-Bin
HB
Wai
Chien M
CM
D000327:Adsorption; D002245:Carbon Dioxide / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004655:Emulsions / Q000737:chemistry; D006586:Hexanes / Q000737:chemistry*; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012996:Solutions; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry*
D004655:Emulsions; D006586:Hexanes; D008670:Metals; D037742:Nanotubes, Carbon; D012996:Solutions; D014867:Water; D002245:Carbon Dioxide