Author(s): Heidari A
In the current research, nanocomposites of Os-Pd/HfC were synthesized using thermal decomposition of solid state from Schiff base complexes of Osmium(IV) with formula of trans–bis(benzenethiolato) [N,N'–ethylenebis (salicylideneaminoato)] osmium(IV) and cis–bis(benzenethiolato) [N,N'–ethylene bis(salicylideneaminoato)] osmium(IV). The synthesized nanocomposites and the synthesized Schiff base complexes were identified using ATR–FTIR, XRD, SEM, TEM and EDX techniques. Also, electrical sedimentation of Os-Pd/HfC nanocomposites was studied. The effects of parameters such as amount of cathode rotation, applying ultrasonic waves and magnetic stirring were investigated. Further, the effect of Hafnium (IV) Carbide grading on the electrochemical sedimentation of the nanocomposites was studied. Hafnium (IV) Carbide with high level of purity was produced and precipitated using combustion synthesis method. The composition and morphology of composite were evaluated by ATR–FTIR, XRD, SEM, TEM and EDX. Moreover, the size of grains was calculated based on Scherrer equation and using X`Pert High Score Plus software. Furthermore, the production process of 2wt% Os-Pd/HfC and 4wt% Os-Pd/HfC nanocomposites powders by thermochemical method was investigated. The produced phases in various steps of heat treatment were identified by DTA–TGA, ATR–FTIR, XRD, SEM, TEM and EDX analyses.