Preparation of manganese molybdate rods and hollow olive-like spheres

Stable phase alpha-manganese molybdate (a-MnMoO4) rods, wolframite structure MnMoO4 hollow olive-like spheres and hexahedron-like manganese molybdate monohydrate (MnMoO4ÆH2O) were selectively synthesized by a simple hydrothermal method at 150– 200 C. Experiments showed that the reaction temperature, pH, molybdenum source and ligand played very important roles in controlling the polymorph and morphologies of the product. The samples were characterized by X-ray powder diffraction and scanning electron microscopy. Possible formation process of the product was proposed.