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Single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder and preparing method thereof

A bismuth phosphate-based hair, single ion technology, applied in the direction of luminescent materials, chemical instruments and methods, sustainable buildings, etc., to achieve the effects of high luminous intensity, simple process flow, and high crystallinity

Inactive Publication Date: 2017-04-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, the existing rare earth ion doped BiPO 4 Dy alone has not been reported in the preparation method of the base luminescent phosphor 3+ doped BiPO 4 Preparation method of fluorescent powder based on white light emission, high crystallinity and good luminous performance

Method used

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  • Single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder and preparing method thereof
  • Single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder and preparing method thereof
  • Single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder and preparing method thereof

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preparation example Construction

[0035] The preparation method of the present invention comprises the following steps:

[0036] (1)Bi(NO 3 ) 3 ·5H 2 O, Dy(NO 3 ) 3 ·6H 2 O and 0.4mol / L NH 4 h 2 PO 4 solution, spare; where NH 4 h 2 PO 4 The solution is NH 4 h 2 PO 4 Add in deionized water, stir for 20-30 minutes to dissolve, set aside;

[0037] (2) Take step 1) spare Bi(NO 3 ) 3 ·5H 2 O and Dy(NO 3 ) 3 ·6H 2 Mix O powder, dissolve it in a nitric acid solution with a volume fraction of 13% to 13.6%, and stir for 10 to 15 minutes to obtain a uniform mixed solution A, and stir to form Bi 0.95 NO 3 : 0.05Dy 3+ , and then add NH dropwise to the mixed solution A 4 h 2 PO 4 solution, continue to stir for 20 to 30 minutes until the reagent is fully dissolved to obtain a mixed solution B; where Bi(NO 3 ) 3 ·5H 2 O, Dy(NO 3 ) 3 ·6H 2 O, nitric acid solution and NH 4 h 2 PO 4 The ratio is (4-x)mmol:xmmol:10mL:4mmol, x=0.1~0.3;

[0038] (3) adjusting the pH value of the mixed solution B ...

Embodiment 1

[0044] (1) Take (4-x)mmol of Bi(NO 3 ) 3 ·5H 2 O and 0.2mmol (0.091g) Dy(NO 3 ) 3 ·6H 2 O was mixed in a beaker, then dissolved in 10 mL of nitric acid solution with a volume fraction of 13%, and stirred magnetically for 15 minutes to obtain a mixed solution A;

[0045] (2) Weigh 4mmol of NH 4 h 2 PO 4 Dissolve in 20mL deionized water, stir for 30min to prepare 0.2mol / L NH 4 h 2 PO 4 Solution, it is added dropwise in the mixed solution A of step (1) gained, stirs 30min, guarantees that it mixes evenly, obtains mixed solution B; Wherein Bi(NO 3 ) 3 , Dy(NO 3 ) 3 ·6H 2 O, nitric acid solution and NH 4 h 2 PO 4 The ratios are (4-x) mmol: x mmol: 10 mL: 4 mmol, x = 0.1, 0.2 and 0.3.

[0046] (3) Adjust the pH of the mixed solution B to 1.00 with dilute nitric acid under stirring conditions to obtain a mixed solution C;

[0047] (4) Stir the above-mentioned mixed solution C for 60 min, transfer it to a stainless steel reaction kettle lined with polytetrafluoroeth...

Embodiment 2

[0055] (1) Take 3.8mmol (1.843g) Bi(NO 3 ) 3 ·5H 2 O and 0.2mmol (0.091g) Dy(NO 3 ) 3 ·6H 2 O was mixed in a beaker, then dissolved in 10 mL of nitric acid solution with a volume fraction of 13.4%, and magnetically stirred for 10 min to obtain a mixed solution A;

[0056] (2) Weigh 4mmolNH 4 h 2 PO 4 Dissolve in 16mL deionized water, stir for 20min to prepare 0.25mol / L NH 4 h 2 PO 4 Solution, it is added dropwise in the mixed solution A of step (1) gained, stirs 20min, guarantees that it mixes evenly, obtains mixed solution B; Wherein Bi(NO 3 ) 3 , Dy(NO 3 ) 3 ·6H 2 O, nitric acid solution and NH 4 h 2 PO 4 The ratio of 3.8mmol:0.2mmol:10mL:4mmol.

[0057] (3) Adjust the pH of the mixed solution B to 1.05 with dilute nitric acid under stirring conditions to obtain a mixed solution C;

[0058] (4) Stir the above mixed solution C for 40 min, transfer it to a stainless steel reaction kettle with a polytetrafluoroethylene lining, seal it, react at 185° C. for 12...

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Abstract

The invention relates to a single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder and a preparing method thereof. The preparing method includes the steps that Bi(NO3)3.5H2O solid powder and Dy(NO3) 3.6H2O solid powder are taken and mixed to be added into a nitric acid solution, the mixture is stirred to be even and reacted to generate Bi0.95NO3:0.05Dy3+, a NH4H2PO4 solution is dropwise added into the solution, the mixture continues to be stirred till the NH4H2PO4 solution is fully dissolved, the pH value of a mixed solution B is adjusted to be 1.00 to 1.05, the mixed solution is reacted at the temperature of 180 DEG C to 185 DEG C to generate precipitate, and when the precipitate is not increased, the temperature is naturally cooled to be the room temperature, the obtained precipitate is centrifugally separated, washed and dried, and the single-ion-Dy-doped bismuth-phosphate-based white-light-illuminating fluorescent powder is finally obtained. The BiPO4:Dy3+ fluorescent powder prepared with the method is high in crystallinity degree, capable of illuminating white light and high in illumination intensity.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of rare earth luminescent materials, and relates to a single-ion Dy-doped bismuth phosphate-based white light-emitting fluorescent powder and a preparation method thereof. [0003] 【Background technique】 [0004] Rare earth luminescent materials occupy a very important position in the whole field of solid state luminescence, because the special electron layer structure makes rare earth elements have incomparable properties of general elements. In recent years, rare earth phosphates have been widely used in the fields of lighting, quantum optics, color TV and thermoluminescence detection because of their advantages such as strong absorption capacity, high luminous brightness, and moderate synthesis temperature, which has aroused extensive interest of scientific researchers. Therefore, finding a method for rare earth phosphates with simple production process, multifunctional products and special morphology is of...

Claims

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Application Information

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IPC IPC(8): C09K11/74C09K11/81
CPCC09K11/7709Y02B20/00
Inventor 刘运马随艳赵敏竹刘丁菡王凯
Owner SHAANXI UNIV OF SCI & TECH
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