Study On The Hydrothermal Synthesis Of MoO₃ One Dimensional Nanometer Materials

Nanoscience and nanotechnology represent one of the most active and most rapidly developing research fields. One-dimensional nanomaterials become a hot areas of nanoelectronics, optoelectronics, micro-mechanical manufacturing, and high-density material fields. Nanometer molybdenum oxide one-dimensional materials attracted more and more attentions because of its' special properties and applications. Nanometer molybdenum oxide one-dimensional materials are widely used in industry as catalysts, display devices, sensors, smart windows, battery electrodes and lubricants. Some synthesis methods , current status, development trend and application of nanometer molybdenum oxide one-dimensional materials were introduced in this paper.The preparation process was composed of two parts. Firstly, the Ammonium molybdate and Nitric acid were used as starting reagents for preparation of nanometer MoO₃ particles. The reaction path shows the following sequence: (1) from the starting compound (NH₄)₆Mo₇O₂₄·4H₂O; (2) Formation of the molybdenum oxide-amine composite; (3) the pure nanoscale molybdenum oxide phase was yielded. Secondly, the Na₂MoO₄·2H₂O and HClO₄ were used as starting reagents for preparation of MoO₃ nanoparticles. Using hexadelyltrimethy ammonium bromide as template, nanoscale molybdenum oxide powders one dimension materials was prepared by hydrothermal synthesis at 180°C and 130°C. CrystallograpHic information of samples was investigated with X-ray diffraction (XRD) . The morphology of crystal samples was examined with scanning electron microscopy (SEM).In this paper, Different experimental conditions were investigated to reveal the formation MoO₃ nanoparticles. The detail experiments were conducted to synthesize MoO₃ nanoparticles by hydrothermal synthesis method. The effects of main factors such as reaction temperature, reaction time, agitation rate, template, acidification condition on synthesization were examined. The results shown that morphology and dimension of crystal samples could be controlled by using template. It could improve the properties of the powder when ultrasonic radiation was introduced into precipitation. The utilization property of the product was discussed too.Simultaneously, a stepwise reaction model and newly growth mechanism of MoO₃ nanoparticles are proposed based on the experimental results and reference.