Preparation and Characterization of b-FeOOH/FeS2 Core/Shell Structure Nanocomposites

Abstract

The b-FeOOH/FeS₂ core/shell structure nanocomposites were synthesized via a sulfuration method. The b-FeOOH nanorods were firstly functionalized as sacrificial templates then converted into b-FeOOH/FeS₂ core/shell nanocomposites using thioacetamide as a sulfur source. Morphologies of the materials were assessed by X-ray diffraction and scanning electron microscopy, while the thermal stability and magnetism properties were characterized by thermogravimetric analysis and vibrating sample magnetometer. It was found that b-FeOOH/FeS₂ core/shell nanocomposites could be obtained at the molar ratio of b-FeOOH to thioacetamide as 1:5-1:7. A possible conversion mechanism was proposed based on the experimental results.