Preparation Of N-Ce Codoped Nano-ZnO And The Study Of Its Capability

Physical and chemical properties of crystal materials have sensitive structure.different from the ideal crystal, any real crystals have a certain degree of structural defects which is crystal defects, and crystal defect type, quantity and its law of motion will have tremendous impact on many properties.This article will combine crystal defect theory and preparation of nano-materials to design a new dual-space preparation of zinc oxide catalyst for metal - nonmetal doped nano-ZnO, meanwhile to explore the defects in zinc oxide's role in catalysis. XRD, FTIR, SEM, TEM and XPS were used to characterize the properties of the as-synthesized amples. its catalytic and Photocatalystic were studied and evaluated,so confirm the optimum technology.The experimental results show that perfect pink powders with standard cubic ZnO crystal phase are obtained under 750℃when the Ce(NO3)3 doping ratio is 1% and the calcining time is 15s.The average primary granularity of the as-synthsized sample is about 30 nm estimated according to Scherrer Equation. The analysises of XPS indicates that the concentrantion of Ce-doped in the sample is 0.91%.Adding different ways, mixing different amounts of N-Ce codoped materials, heating rate were studied, the results show that dissolved ammonium perchlorate at first, then mixed with 3% ammonium perchlorate can get the best performance of its thermal catalytic.Meanwhile explore the mechanism of the thermal catalytic decomposition of ammonium perchlorate.Through the calcination temperature and doping ratio of cerium nitrate, a total dopant concentration, initial solution pH, initial concentration of methylene blue, light source, whether pass oxygen et al influencing factors researching ,the result show the optimum technology is: calcination temperature : 700℃, the doping ratio of cerium nitrate :1%, codoped concentration : 1.5g/L, solution pH = 9, the initial concentration of methylene blue :10mg/L, light source :300W, pass oxygen, and in th 30min the catalytic degradation rate can reach 100%Through the study of the thermal catalytic properties and photocatalytic properties found that: vacancies and electrons in the process of catalytic played an important role.Through the preparation methods described in this article can be an efficient, low-cost N-Ce codoped nano-ZnO. In catalytic ammonium perchlorate and methylene blue solution used in the course of the catalyst, can greatly improve the catalytic efficiency.