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Rare-earth-based light absorption material and preparation method and application thereof

A light-absorbing material, rare-earth-based technology, applied in the direction of rare-earth metal compounds, chemical instruments and methods, rare-earth metal oxides/hydroxides, etc., to achieve low cost, simple operation, and reduced damage

Inactive Publication Date: 2018-09-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to obtain stable redshift materials has not yet been seen

Method used

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  • Rare-earth-based light absorption material and preparation method and application thereof
  • Rare-earth-based light absorption material and preparation method and application thereof
  • Rare-earth-based light absorption material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The steps of preparing the cerium oxide powder material doped with lanthanum are as follows:

[0040] 1. The rare earth chloride solution is prepared according to a certain mass ratio of the lanthanum and cerium elements, so that the lanthanum elements account for 5% to 15% of the mass of the lanthanum and cerium elements. The prepared rare earth chloride solution is composed of cerium chloride and lanthanum chloride.

[0041] 2. Preparation of rare earth oxalic acid precipitate: Add the prepared saturated oxalic acid solution to the rare earth chloride solution. During the precipitation process, the liquid phase temperature is kept between 20°C and 40°C. After all the rare earth elements in the solution are precipitated , for suction filtration.

[0042] 3. The rare earth oxalate precipitate obtained after suction filtration is sintered at high temperature, the sintering temperature is between 700°C and 950°C, and the sintering time is generally between 1h and 3h.

...

Embodiment 2

[0046] Specifically, lanthanum carbonate and cerium carbonate containing crystal water are used as raw materials to prepare a rare earth chloride solution. Firstly, lanthanum carbonate and cerium carbonate were dissolved in 10mol / L concentrated hydrochloric acid, and the concentration of lanthanum and cerium in the lanthanum chloride and cerium chloride solution was determined by EDTA titration.

[0047] Prepare a mixed solution of lanthanum and cerium elements according to the mass ratio of lanthanum and cerium elements of 1:10, add oxalic acid solution to the mixed rare earth chloride solution, and perform suction filtration after all the rare earth elements in the solution are precipitated.

[0048] The precipitate was sintered at 800°C for 2 hours. After sintering, the precipitate taken out is the target product.

[0049] The ultraviolet-visible light absorption spectrum of the cerium oxide doped with lanthanum element prepared in this embodiment and pure cerium oxide is ...

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Abstract

The invention relates to a rare-earth-based light absorption material and a preparation method and application thereof. The rare-earth-based light absorption material is a lanthanum doped cerium oxidematerial and can absorb blue light and ultraviolet light in visible light, and the absorption threshold of the rare-earth-based light absorption material is 490 nanometers. The preparation method issimple, practicable, low in cost and capable of achieving large-scale production. The rare-earth-based light absorption material has the advantages that the rare-earth-based light absorption materialcan absorb electromagnetic waves of 200-490 nanometers, the powered material can effectively absorb the blue light and ultraviolet light in the visible light, and the material can be used as the absorbent of blue light and ultraviolet light to be applied to coating, skincare products and the manufacturing field of products such as screens and glass.

Description

technical field [0001] The invention relates to a preparation method of a rare earth-based light-absorbing material, and belongs to the technical field of material preparation. Background technique [0002] The electromagnetic wave wavelength of visible light is between 200nm-800nm, wherein the wavelength range of ultraviolet light in visible light is 200nm-350nm, the wavelength range of purple light is 350nm-455nm, and the wavelength range of blue light is 455nm-492nm. Ultraviolet light is harmful to human skin and can induce a variety of skin diseases. Therefore, many skin care products need to add UV blocking agents; in addition, because ultraviolet light can induce carbon-carbon double bonds or carbon-oxygen bonds in organic coatings, etc. Functional groups degrade, therefore, most organic coatings also need to add UV blocking agents. Purple light and blue light are some of the electromagnetic waves that are more harmful to the human eye in visible light. Currently, TV ...

Claims

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Application Information

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IPC IPC(8): C01F17/00G02B5/00
CPCC01F17/206C01P2002/72C01P2002/82C01P2002/84C01P2002/85C01P2004/03C01P2004/82G02B5/003
Inventor 田昂裴文利史晓国马腾达王镝翔
Owner NORTHEASTERN UNIV
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