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A kind of ultraviolet-visible light absorber and application thereof

An absorber and visible light technology, applied in the field of ultraviolet light absorbing materials, to achieve the effect of small particle size, good thermal stability and high efficiency

Active Publication Date: 2017-03-08
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently regarding Ce 4+ Doped with La 2 (WO 4 ) 3 Compounds and their preparation methods are seldom reported

Method used

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  • A kind of ultraviolet-visible light absorber and application thereof
  • A kind of ultraviolet-visible light absorber and application thereof
  • A kind of ultraviolet-visible light absorber and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 An ultraviolet-visible light absorber is prepared by the following preparation method:

[0032] 1) The preparation concentration is 0.10 mol L -1 Lanthanum oxide solution and sulfuric acid solution with a mass concentration of 70%, add sulfuric acid solution dropwise to the lanthanum oxide solution, react at 40°C for 2 h to generate La 2 (SO 4 ) 3 ; Wherein, the volume ratio of the lanthanum oxide solution and the sulfuric acid solution is 2:3;

[0033] 2) The preparation concentration is 0.30 mol L -1 Tungstic acid solution, and add ammoniacal liquor to tungstic acid solution, reaction prepares ammonium tungstate; Wherein, the volume ratio of described tungstic acid solution and ammoniacal liquor is 1:3;

[0034] 3) To the La generated in step 1) 2 (SO 4 ) 3 Add the ammonium tungstate solution generated in step 2) dropwise into the solution until a white precipitate is formed, then add Ce(SO 4 ) 2 4H 2 The O solution continued to react for 30 min, a...

Embodiment 2

[0044] Example 2 An ultraviolet-visible light absorber is prepared by the following preparation method:

[0045] 1) The preparation concentration is 0.12 mol L -1 Lanthanum oxide solution and sulfuric acid solution with a mass concentration of 80%, add sulfuric acid solution dropwise to the lanthanum oxide solution, react at 50°C for 2.5h to generate La 2 (SO 4 ) 3 ; Wherein, the volume ratio of the lanthanum oxide solution and the sulfuric acid solution is 5:8;

[0046] 2) The preparation concentration is 0.40 mol L -1 Tungstic acid solution, and add ammoniacal liquor to tungstic acid solution, reaction prepares ammonium tungstate; Wherein, the volume ratio of described tungstic acid solution and ammoniacal liquor is 2:7;

[0047] 3) To the La generated in step 1) 2 (SO 4 ) 3 Add the ammonium tungstate solution generated in step 2) dropwise into the solution until a white precipitate is formed, then add Ce(SO 4 ) 2 4H 2 The O solution continued to react for 45 min, ...

Embodiment 3

[0052] Example 3 An ultraviolet-visible light absorber is prepared by the following preparation method:

[0053] 1) The preparation concentration is 0.15 mol L -1 Lanthanum oxide solution and sulfuric acid solution with a mass concentration of 85%, add sulfuric acid solution dropwise to the lanthanum oxide solution, react at 60°C for 3 h to generate La 2 (SO 4 ) 3 ; Wherein, the volume ratio of the lanthanum oxide solution and the sulfuric acid solution is 3:5;

[0054] 2) The preparation concentration is 0.50 mol L -1 Tungstic acid solution, and add ammoniacal liquor to tungstic acid solution, react and prepare ammonium tungstate; Wherein, the volume ratio of described tungstic acid solution and ammoniacal liquor is 1:4;

[0055] 3) To the La generated in step 1) 2 (SO 4 ) 3 Add the ammonium tungstate solution generated in step 2) dropwise into the solution until a white precipitate is formed, then add Ce(SO 4 ) 2 4H 2 The O solution continued to react for 60 min, a...

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Abstract

The invention discloses an ultraviolet visual light absorbent and application thereof. The ultraviolet visual light absorbent is obtained with lanthanum sulfate, ammonium tungstate and ceroussulfate serving as raw materials through a coprecipitation method. The structural formula of the ultraviolet visual light absorbent is La2 (WO4)3:Ce4+. Ce4+ accounts for 4% to 8% of the La2 (WO4)3:Ce4+. The ultraviolet visual light absorbent can absorb ultraviolet light to serve as application on the aspect of an ultraviolet absorber. The prepared La2 (WO4)3:Ce4+ has maximum absorption at the wavelength of 240 nm, the absorbing ability of the ultraviolet region is far higher than the adsorbing ability of the visual region, and the ultraviolet visual light absorbent has the advantages of being wide in absorption wavelength range, high in absorption capacity, high in efficiency and capable of absorbing ultraviolet light. The La2 (WO4)3:Ce4+ is easy to prepare, stable in property and high in safety and has good generalizability and market prospects.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet light absorbing materials, in particular to an ultraviolet and visible light absorbing agent and its application. Background technique [0002] La 2 (WO 4 ) 3 It is an important rare earth functional material, which can be used as a catalyst, a high-efficiency photo-based semiconductor material; 4 2- The covalent bond component is obvious, and the oxygen ion in the polyhedron is polarized by the adjacent high-valence state tungsten, which weakens the concentration quenching effect of the activated ion, which is very beneficial to increase the concentration of the doping ion, so that the length of the required crystal is greatly shortened. It has the advantages of wide absorption peak, large gain and high efficiency, so La 2 (WO 4 ) 3 It is a UV-visible light absorbing material with good application prospects. [0003] Ultraviolet light radiation energy accounts for 8% of the total sola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/48A61K8/19A61Q17/04C01G41/00
Inventor 于海莲胡震
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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