Synthesis of palladium nanoparticles by reaction of filamentous cyanobacterial biomass with a palladium(II) chloride complex.
The interaction of cyanobacterial biomass (Plectonema boryanum UTEX 485) with aqueous palladium(II) chloride (PdCl2 degrees ) has been investigated at 25-100 degrees C for up to 28 days. We report that the release of organic materials from the cyanobacteria promoted the precipitation of Pd(0) as crystalline spherical and elongate nanoparticles (< or =30 nm), both in solution and as dispersed and encrusted nanoparticles on cyanobacterial cells. In contrast, under abiotic conditions at 100 degrees C, palladium hydride (PdHx) was the principal palladium phase precipitated, with only minor amounts of palladium metal.
Department of Earth Sciences, University of Western Ontario, London, Ontario, N6A 5B7, Canada. maggylengke@yahoo.com
Maggy F
MF
Lengke
Michael E
ME
Fleet
Gordon
G
Southam
D018533:Biomass; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D046938:Plectonema / Q000737:chemistry*; D013053:Spectrophotometry; D014961:X-Ray Diffraction; D014965:X-Rays
D010984:Platinum; D010165:Palladium; C008756:palladium chloride