Preparation and Hydrogen Reduction Property of MoO3 Nanofibers

MoO3 nanofibers with 50 similar to 100 nm diameter and larger than 20 mu m length were prepared at 170 degrees C constant temperature for 40 h using (NH4)(6)Mo7O24 center dot 4H(2)O and nitric acid as starting materials through hydrothermal process. Then the hydrogen reduction tests of the, prepared MoO3 nanofiber were carried out at different temperatures within 450 similar to 650 degrees C. The samples prepared by hydrogen reduction tests were characterized by XRD and FSEM. The results indicated that MoO3 nanofibers began to change into MoO2 at 450 degrees C, and could be completely reduced to Mo powder with 0.1 similar to 2 mu m particle size at 600 degrees C. During the reduction process, the original fiber-like morphology Of Most MoO3 nanofibers was not well-retained; but in some cases, the fiber-like morphology of a small part of single MoO3 nanofibers in free space could be retained, and changed into needle-like Mo particles.