Molybdenum-Tungsten Blue Nanoparticles as a Precursor for Ultrafine Binary Carbides.

Herein, we demonstrate a promising method for the synthesis of ultrafine carbide particles using dispersions of molybdenum-tungsten nanoparticles. Dispersions of molybdenum-tungsten blue nanoparticles with different initial molar ratios of molybdenum/tungsten were synthesized through the reduction of molybdate and tungstate ions by ascorbic acid in an acidic medium (pH = 1.0-2.