The influence of ultrasound on the Ruthenium iodide RuI3-catalyzed oxidation of phenol: Catalyst study and experimental design
Denny Thiemig, Andreas Bund¹; Applied Surface Science 255 (2009) 41644170.
Abstract: The effect of ethanol on the electrocodeposition of nickel alumina nanocomposites was investigated using an acidic nickel sulfamate electrolyte. The surface charge and sedimentation behaviour of the 13 nm alumina particles in the nickel plating bath were characterized as a function of the ethanol concentration and the pH of the electrolyte. High ethanol contents cause a decrease in the surface charge and dispersion stability of the alumina particles in the plating electrolyte. The effects of the deposition conditions, i.e. ethanol content, current density, and particle content of the electrolyte on the codeposition of nickel alumina composites were investigated systematically. Low values of current density and high amounts of ethanol in the plating bath were found to be beneficial for the particle entrapment. The structure as well as themicrohardness of the nickel films were investigated as a function of the electrolyte composition and the particle incorporation. A textural modification combined with a distinct grain refinement was found with increasing ethanol content of the electrolyte and due to the alumina incorporation. The microhardness of the layers increased with decreasing ethanol content of the electrolyte and increasing nanoparticle incorporation.
Key words: Electrodeposition • Nickel alumina nanocomposite • Ethanol • Zeta potential • Microhardness • Alumina dispersion • Stability • LUMiFuge
¹ Physical Chemistry and Electrochemistry, Technische Universitašt Dresden, D-01062 Dresden, Germany.Contact us
For more information about this article or to discuss your specific application needs please contact us.