Simplified Synthesis of Cobalt Ferrite Nanotubes Using Sol–Gel Method

Abstract

Cobalt ferrite nanotubes with diameter of 50 nm were prepared using a simple sol–gel process within the pores of anodic aluminum oxide (AAO) template. SEM, TEM, XRD, VSM were used to characterize the morphology, crystalloid structure, and magnetic properties of the samples. The results indicate that the cobalt ferrites thus prepared were polycrystalline phase with the smooth and uniform tube-like structure. The method is also expected to be applicable to the preparation of other multicomponent oxide nanotubes.

Preparation and Characterization of Ring-Shaped Co Nanomaterials

“…In addition to the electrical, optical and other characteristic properties, the size and shape of inorganic nanocrystals are important factors for application, – Therefore, a lot of efforts have been directed to the accurate control processes in tailoring the shape, size, dimensionality, and complexity of nanocrystals . In this direction, submicrometer-sized or nanoscaled ferromagnetic cobalt with various morphologies, including particles, , tubes, , rods, , wires, – rings, and even chains of hollow spheres , have been successfully synthesized. Accordingly, various synthesizing methods, such as the self-assembly, thermal decomposition, template, solid-state, chemical solution, and sol−gel methods, have been developed to grow magnetic Co nanomaterials.…”