Synthesis of Ag coated Cr[sup 4+]/Cr[sup 3+] nanocomposites by mechanical attrition method

Abstract

Here, we report an innovative technique of synthesis of stable Cr4+/Cr3+ nanocomposite coated with a thin surface layer of metallic silver. The process involves a high energy milling of CrO3 powders leading to an amorphous precursor powder. The amorphous powder is coated with a thin layer of silver by a simple chemical reduction method, followed by a heat treatment at 400 °C, which leads to the formation of recrystallized Ag coated Cr4+/Cr3+ nanocomposite.