A method for preparing rare earth vanadate thin film by replacement reaction

Abstract

The invention discloses a method for preparing a rare earth vanadate film by replacement reaction, which comprises the following steps: dissolving a rare earth nitrate compound in deionized water to prepare a rare earth ion solution; placing it in a water bath at a certain temperature to obtain a spare electrode A deposition solution; a three-electrode system is formed; the three-electrode system is inserted into a spare electrodeposition solution, and a layer of electrodeposition film is deposited on the working electrode; the electrodeposition film is rinsed with deionized water and absolute ethanol respectively, and then dried to prepare The rare earth layered hydroxide film is obtained; the sodium vanadate solution is prepared, and the pH of the solution is adjusted; the sodium vanadate solution and the electrodeposited rare earth layered hydroxide film are put into a hydrothermal reaction kettle for replacement reaction; cooled to room temperature, washed , dried to obtain rare earth vanadate LnVO 4 film. The rare earth vanadate film prepared by the invention has good regularity, high adhesion, good dispersion and excellent crystallinity.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a method for preparing rare earth vanadate film by replacement reaction. Background technique [0002] At present, rare earth compound luminescent materials play an important role in practical applications, and are widely used because of their various types and excellent performance. Therefore, the research on the synthesis and properties of rare earth luminescent materials is a very active research field. [0003] Rare earth vanadate materials have abundant energy levels due to rare earth ions, and their 4f electron orbitals have a unique electronic structure and diverse transition modes, which can transition between different energy levels, often greatly improving the optical properties of rare earth vanadate , and rare earth vanadate has good chemical stability, thermal stability and unique structural characteristics, therefore, rare earth...

AI Technical Summary

Problems solved by technology

For rare earth vanadate thin films, it is often necessary to prepare the powder and then apply it to the substrate by various methods, such as the sol-gel method, which often combines the rare earth vanadate powder with the sol, and then undergoes high temperature after the sol is solidified. Rare earth vanadate film can be prepared only after treatment. This method often affects the actual application effect of vanadate due to the poor adhesion of the substrate.

Images