A kind of rare earth vanadate film and its preparation method and application

A rare-earth vanadate and rare-earth nitrate technology, applied in chemical instruments and methods, discharge tubes, luminescent materials, etc., can solve the problem of poor adhesion and uniformity of vanadate powder and glass substrate

Active Publication Date: 2022-04-26
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

For rare earth vanadate thin films, it is often necessary to coat the substrate by various methods after the powder is prepared, such as the sol-gel method, which often combines the rare earth vanadate powder with the sol, and after the sol is solidified, it is subjected to 500 Rare earth vanadate thin films can only be prepared by high-temperature treatment at ~1300°C, but the film prepared by this method has poor adhesion and uniformity between the vanadate powder and the glass substrate, and requires high-temperature treatment, which affects the prepared vanadium. Salt films are often unfavorable

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  • A kind of rare earth vanadate film and its preparation method and application
  • A kind of rare earth vanadate film and its preparation method and application
  • A kind of rare earth vanadate film and its preparation method and application

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preparation example Construction

[0046] The invention provides a method for preparing a rare earth vanadate thin film, comprising the following steps:

[0047] Using the aqueous solution of rare earth nitrate as the electrodeposition solution, the rare earth layered hydroxide film was prepared by pulse voltage deposition method;

[0048] After mixing the metavanadate and water, the pH value is adjusted to 7-12 to obtain a metavanadate solution;

[0049]The rare earth layered hydroxide film is immersed in the metavanadate solution to carry out replacement reaction to obtain the rare earth vanadate film.

[0050] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0051] The invention uses the aqueous solution of rare earth nitrate as the electrodeposition solution, and adopts the pulse voltage deposition method to prepare the rare earth layered hydroxide film. In the present invention, the preparation ...

Embodiment 1

[0069] (1) Eu(NO 3 ) 3 ·6H 2 O was dissolved in deionized water, and heated to 55°C in a water bath to obtain an electrodeposition solution with a concentration of rare earth metal ions of 0.1mol / L;

[0070] (2) Insert the three-electrode system into the electrodeposition solution, adopt the pulse voltage deposition method, set the deposition voltage to -0.9V, deposit at this voltage for 1.5min, repeat 4 times with an interval of 20s, and set the deposition voltage to - 1V, after depositing at this voltage for 2min, repeat 3 times at an interval of 10s, and the total deposition time is 12min, deposit a thin film on the working electrode material to obtain an electrodeposited thin film; the working electrode of the three-electrode system is ITO glass, and the auxiliary electrode It is a Pt mesh, and the reference electrode is Ag / AgCl / Cl - ;

[0071] (3) The electrodeposited film was washed sequentially with deionized water and absolute ethanol, and dried in a blast drying o...

Embodiment 2

[0078] (1) Nd(NO 3 ) 3 ·6H 2 O was dissolved in deionized water and heated to 20°C in a water bath to obtain an electrodeposition solution with a concentration of rare earth metal ions of 1 mol / L;

[0079] (2) Insert the three-electrode system into the electrodeposition solution, adopt the pulse voltage deposition method, set the deposition voltage to -1.1V, deposit at this voltage for 2 minutes, repeat 4 times with an interval of 20s, and set the deposition voltage to -1.3 V, after depositing at this voltage for 2min, repeat 3 times at an interval of 10s, the total deposition time is 14min, deposit a thin film on the working electrode material to obtain an electrodeposited thin film; the working electrode of the three-electrode system is ITO glass, and the auxiliary electrode It is a Pt mesh, and the reference electrode is Ag / AgCl / Cl - ;

[0080] (3) The electrodeposited film was washed sequentially with deionized water and absolute ethanol, and dried in a blast drying ov...

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Abstract

The invention provides a rare earth vanadate thin film and its preparation method and application, belonging to the technical field of inorganic non-metallic thin films. The preparation method of the rare earth vanadate thin film provided by the invention comprises the following steps: using the aqueous solution of rare earth nitrate as the electrodeposition solution, adopting the pulse voltage deposition method to prepare the rare earth layered hydroxide thin film; After mixing, the pH value is adjusted to 7-12 to obtain a metavanadate solution; the rare earth layered hydroxide film is immersed in the metavanadate solution for replacement reaction to obtain a rare earth vanadate film. The preparation method provided by the invention has mild reaction conditions and simple operation, and the prepared rare earth vanadate film is flat and uniform, with high film adhesion; the microscopic morphology of the film is nano-particles, the particles are fine and uniform, the crystal shape is high, and the luminescence performance is high. it is good.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metal thin films, in particular to a rare earth vanadate thin film and its preparation method and application. Background technique [0002] The vanadate luminescent material is a typical matrix-sensitized luminescent material. The vanadate matrix has a strong absorption in the ultraviolet region and effectively transfers the energy to the active ions, and then emits the characteristic spectrum of the active ions. [0003] Due to the unique structural characteristics of rare earth vanadate materials, it has good chemical stability, magnetism, photocatalytic activity, thermal stability, electrical conductivity and good gas sensitivity, etc., in optical materials, magneto-optical materials, magnetic It has a wide range of applications in resistive materials, dielectric materials, adsorption materials, catalysts, and chemical sensing. [0004] At present, there are few studies on the preparati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04
CPCC09K11/7736C09K11/7756C09K11/7708C09K11/7776H01J29/20H01J2229/18
Inventor 武晓鹂张鹤黄俊杰任珂刘远立
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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