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Ultraviolet visual light absorbent and application thereof

An absorber and visible light technology, applied in the field of ultraviolet light absorbing materials, to achieve the effect of strong absorption capacity, wide application prospects, and uniform particle distribution

Active Publication Date: 2015-11-11
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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  • Ultraviolet visual light absorbent and application thereof
  • Ultraviolet visual light absorbent and application thereof
  • Ultraviolet visual light absorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 A kind of ultraviolet-visible light absorber, adopts following preparation method to prepare:

[0032] 1) The preparation concentration is 0.10mol 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, and react at 40°C for 2h 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 0.30mol 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 fo...

Embodiment 2

[0044] Embodiment 2 A kind of ultraviolet-visible light absorber, adopts following preparation method to prepare:

[0045] 1) The preparation concentration is 0.12mol 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 0.40mol 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 ...

Embodiment 3

[0052] Embodiment 3 A kind of ultraviolet-visible light absorber, adopts following preparation method to prepare:

[0053] 1) The preparation concentration is 0.15mol 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 3h 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 0.50mol 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...

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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, and in particular relates to an ultraviolet-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 light matrix semiconductor material; due to WO 4 2- The covalent bond composition is obvious, and the oxygen ions in the polyhedron are polarized by the adjacent high-valence tungsten, which weakens the concentration quenching effect of the activated ions, which is very beneficial to increase the concentration of doped ions, and greatly shortens the length of the required crystal. 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 prospect. [0003] The energy of ultraviolet light radiation accounts for 8% of ...

Claims

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Application Information

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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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