Sol-Gel Route for the Synthesis of CoFe Er O Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications.

This study reports the formation of Er-doped nanocrystalline cobalt ferrite with the formula CoFe Er O (0.0 ≤ ≤ 0.10) from nontoxic metal precursors Co(NO)·6HO, Fe(NO)·9HO, and Er(NO)·5HO through an easy and economical sol-gel route in which citric acid is served as the chelating agent.

Enhanced catalytic activity of inhomogeneous Rh-based solid-solution alloy nanoparticles.

Catalytic Rh-based alloy nanoparticles (NPs) with inhomogeneous solid-solution structures were prepared from homogeneous solid-solution alloy NPs. Compared with homogeneous alloy NPs, these inhomogeneous alloy NPs exhibited enhanced catalytic activity and superior catalytic durability. Homogeneous solid-solution alloy NPs consisting of Rh and other immiscible noble metals were synthesized by laser-induced nucleation method in metallic ion solutions.