title: Deposition of metal nanoparticles on carbon nanotubes via hexane modified water-in-CO2 microemulsion at room temperature.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Idaho, Moscow 83844, USA.
authors.forename: Joanna Shaofen
authors.initials: JS
authors.lastname: Wang
authors.forename: Horng-Bin
authors.initials: HB
authors.lastname: Pan
authors.forename: Chien M
authors.initials: CM
authors.lastname: Wai
mesh_terms: 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*
chemical_list: D004655:Emulsions; D006586:Hexanes; D008670:Metals; D037742:Nanotubes, Carbon; D012996:Solutions; D014867:Water; D002245:Carbon Dioxide