Microwave Synthesis And Properties Research Of Sb₂S₃,Co₃S₄ And Bi₂O₃

As a special synthesis method, microwave heating synthesis techniquepossess the virtues of high heat efficiency, no temperature grads, shortpreparation time, no pollution, simple technics equipment, operating conditioncontrolling easily, it was widely applied in recent years. Microwavetechnology opened a new way in chemistry synthesis field. In this experiment,the representative metal sulfides and metal oxide were the study objects,which were succefully prepared. The main contents were as follows:In this work, a domestic microwave oven (Galanz, WP900) was modifiedwith refluxing system and used to directly prepare two metal sulfides, such as,Sb₂S₃ and Co₃S₄ powder materials. The phase and morphology werecharacterized by the means of XRD, TEM and HRTEM. The TEM image ofthe sample Sb₂S₃ shows the sample are consist of nanorod bundles and smallamount particles. HRTEM and SAED demonstrates the preferential directiongrowth of Sb₂S₃ nanorod. The SEM image of C03S4 shows that the sample arespheric particles and the everage particle size is about 100nm. In the reactionsystem, the PVP were used as organic dispersant, which prevent the particleaggregation.The electrochemical properties of two metal sulfides were investigated byconstant current charge/discharge cycling and cyclic voltammorgram tests inlithium hexafluorophosphate(LiPF₆) electrolyte. The possible electrochemicalreaction mechanism was explained. The results indicate that the two metalsulfides shows potential application in the field of the electrode materials.Microwave heating is an assisted-synthesis method to prepare metaloxide powder. Bi₂O₃ particles have been successfully prepared by microwaveirradiation process and subsequent thermal treatment. XRD result shows thatno Bi₂O₃ phase exist in the sample. After calcined, the sample is wellcrystallized monoclinic and FTIR results show the Bi-O bond appeared. Theproperties of potocatalyze of the Bi₂O₃ were preparatorily investigated. Theinvestigation of catalyze indicated that the Bi₂O₃ could oxidate sodium nitriteunder the light, which deserved futher research.