SYNTHESIS VIA A HNO_3 ASSISTED AND PHOTOCATALYTIC PROPERTY OF HEXAGONAL MOLYBDENUM TRIOXIDE

Hexagonal phase MoO3 has been synthesized by hydrothermal method via a HNO3 Assisted at low temperature.The as-synthesized products were characterized by XRD,SEM,FI-TR and TG.UV-Vis spectral was used to measure band gap of the as-synthesized products.After calcined at 350 ℃,hexagonal MoO3 was changed to orthorhombic MoO3.The photocatalytic activity was evaluated by monitoring the degradation of methylene blue dye.The decolorization rates of methylene blue reached 94.6% and 81.2% for hexagonal and orthorhombic MoO3,respectively.The result showed the photocatalytic activity of hexagonal MoO3 was higher than orthorhombic MoO3.