Synthesis And Characterization Of Mg-doped LaFeO₃Nanoparticles And Rare Earth Elements Doped LaPO₄Nanorods

Complex oxide nanomaterials are widely used in the field of catalysis. Preparation of perovskite type compound required low cost, and its material structure has a very high stability, diversity elements. And the reaction in the catalyic combustion of carbon monxide, methane and other organic matter have a good catalytic performance. So, the material has considerable application prospects in automotive exhaust gas treatment. The catalyst particle size, specific surface area and dispersion play an important effect of its catalytic effect. The preparation of small particle size, good dispersibility, and large specific surface area of the catalyst particles has important significance for research and practical application.Scientists have more and more attention to the rare earth luminescent materials, especially the study and application of rare earth phosphate for their chemically stable, easy to implement doping and sensitization.It is the most likely alternative the modern quantum dot fluorescent material in the near future.1. In the preparation process of magnesium-doped LaFeO3, the paper used the improved sol-gel method, the introduction of an excess of magnesium element in the initial stage of the reaction,then it is formed in the subsequent high temperature processing excessed magnesia which suppress the growth of the particles and reunion, and by the different initial added amount of the magnesium to achieve the purpose of control sample topography, their size are between13.8nm to31.3nm, specific surface area between4.4to45.2m2/g. XPS and carbon monoxide catalytic experiments confirmed the series LaFe0.9Mg0.1O3samples catalytic activity.2. Hydrothermal synthesis but auxiliary agent was not added in the case of lanthanum phosphate nanorods samples and prepared in lower temperature, about long5um width240nm, with a single good dispersibility. Its doping research, including Tb3+doped、Tb3+and Gb3+doped two forms. Tb3+and Gb3+doped sample’s emission intensity is much higher than the Tb3+single-doped samples, indicating that the Gd3+can be used as a sensitive Tb3+agent.