Research Of The Rare Earth Vanadate And Rare Earth Organic Inorganic Hybrid Luminescence Materials Research

Since the discovery of rare earth, the special structure features, such as their properties of luminescence, electric or magneti, are abstract a number of researchers’ interest. There are all kinds of the rare earth with high quality in China. The research and development of rare earth become the hottest topic now. Rare earth luminescence material is an important functional material, have found wide applications in many fields, such as display, illumination and photo-electronic devices. With the rapid development of nanotechnology, nano- and micro-scaled luminescence materials have drawn much attention and been the hottopic because these materials have many miraculous properties compared with the bulk materials.Vanadates have excellent thermal and chemical stability, and their Luminescence materials exhibit a wide range of physical and chemical properties that depend sensitively on both size and shape, and are of both fundamental and technological interest. In addition, based on the weak luminescence of the rare earth vanadate,luminous efficiency is not high, the organic inorganic hybrid luminescent material performance as a complementary of popular new materials. Therefore, luminescence materials shape control is one of the most important research points.This article used hydrothermal synthesis method in different kinds of surfactants and different pH value under the joint action of the preparation of luminescent performance of mesoporous rare-earth vanadate and the organic inorganic hybrid luminescent material as the research subject, and the synthesis conditions, the growth mechanism, the relationship between morphology structure and its performance werestudied Using X-ray diffraction(XRD), scanning electron microscopy(SEM),transmission electron microscopy(TEM), infrared spectroscopy(FTIR), nitrogen absorption and fluorescence spectrometer(PL) tested the product formation phase,morphology and performance characteristics.This dissertation includes there parts, the results are as follows:(1) Through the horizontal comparison, it is concluded that the preparation of mesoporous GdVO4:Eu3+ special method of luminescent material: using hydrothermal synthesis method, reaction temperature 180℃, 24 h reaction time, pH value of 14, at the same time to add two kinds of surfactants CTAB and SDS. And the mesoporous GdVO4:Eu3+ luminescence properties of luminescent material was studied, and the luminescence performance is excellent.(2) In preparation of wide pH range YVO4:Eu3+ luminescence materials, and discusses the different pH, different solvents, reaction solution special morphology of vanadate luminescent material, and further study the morphology of pH value of the related mechanism. Test results show that the YVO4:Eu3+ morphology on the luminescence properties of the luminescent material has the certain influence.(3) In the same pH, by changing the amount of adding urea to the preparation of good crystallinity YVO4:Eu3+ luminescent material. Analyzed the urea in the YVO4:Eu3+ phosphors generate process function, and uses the fluorescence spectrometer with different addition amount of YVO4:Eu3+ luminescence properties of luminescent material, according to the results obtained the good performance of YVO4:Eu3+luminescent material.(4) Preparation of the excellent luminescent properties of rare earth complexes,and the method of using chemical self-assembly the object of the high performance of rare earth complexes in the assembly of the above mesoporous YVO4:Eu3+, build new mesoporous organic-inorganic hybrid materials. In addition, tested on the performance of the new material, the luminous performance of the materials with rare earth complexes is strengthened.