Preparation method of thenoyltrifluoroacetone (HTTA) modified rare earth hydroxide nano-sheet fluorescence reinforcing material

Abstract

The invention discloses a preparation method of a thenoyltrifluoroacetone (HTTA) modified rare earth hydroxide nano-sheet fluorescence reinforcing material. The preparation method comprises the following steps of dissolving yttrium nitrate hexahydrate into deionized water firstly, then adding europium nitrate hexahydrate, and performing uniform mixing; dropwise adding dilute ammonia water, and regulating a pH value of the solution to 7.5; putting the solution in a microwave field, performing continuous microwave treatment for 20 min in the N2 protection atmosphere, performing air pump filtration, water washing and washing with ethanol on a product after microwave treatment, and then putting the product in a vacuum drying tank at the condition with the temperature being 35 DEG C for dryingand grinding to obtain a dry powdery rare earth hydroxide hydrate; and then performing ion exchange, ultrasonic treatment and modification on the dry powdery rare earth hydroxide hydrate to obtain theHTTA modified rare earth hydroxide nano-sheet fluorescence reinforcing material. According to the preparation method, by utilizing the antenna effect of a ligand, the energy absorbed by the ligand istransferred to rare earth ions, so that the fluorescence performance of a composite is improved by an order of magnitude.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis materials, and is a rare earth hydroxide nanosheet {Y 1.9 Eu 0.1 (OH) 5 +} n The preparation method, so that its fluorescence performance can be improved by orders of magnitude. Background technique [0002] Rare earth luminescent material Rare earth elements (RE) have atomic numbers of 57-71 in group IIIB of the periodic table. These elements are also called lanthanides. Based on their excellent magnetic, optical and electrical properties, lanthanides are widely used in various materials. Rare earth hydroxide nanosheets have aroused the interest of many researchers because of their unique two-dimensional sheet structure. Most of the previous work focused on the structure and synthesis of LRH (layered rare-earth hydroxide), its intercalation reaction, and the exfoliation of nanosheets. The fluorescence, catalysis, and self-assembly of nanosheets of LRH, including its intercalatio...

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Problems solved by technology

Although this method eliminates the fluorescence quenching phenomenon caused by O-H phonon coupling vibration, and the fluorescence performance has been significantly improved, but the nanosheets after heating and oxidation treatment lose the original positive charge on the surface, which greatly reduces the use of The possibility of device construction using nanosheets as raw materials due to electrostatic interaction, and the superimposition of nanosheets after heat treatment leads to an increase in thickness

The unique ultra-thin two-dimensional features of nanosheets are lost, which also reduces their potential application value to a certain extent.

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