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BiPO4: Eu<3+> fluorescent powder synthesized with help of surfactant CTAB (Cetyltrimethyl Ammonium Bromide) and method for synthesizing BiPO4: Eu<3+> fluorescent powder

A technology of surfactants and phosphors, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low crystallinity and low luminous intensity of phosphors, and achieve improved luminous performance, high luminous intensity, and simple process flow Effect

Inactive Publication Date: 2017-05-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the phosphor powder produced by adding some surfactant-assisted synthesis methods has low crystallinity and low luminous intensity

Method used

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  • BiPO4: Eu&lt;3+&gt; fluorescent powder synthesized with help of surfactant CTAB (Cetyltrimethyl Ammonium Bromide) and method for synthesizing BiPO4: Eu&lt;3+&gt; fluorescent powder
  • BiPO4: Eu&lt;3+&gt; fluorescent powder synthesized with help of surfactant CTAB (Cetyltrimethyl Ammonium Bromide) and method for synthesizing BiPO4: Eu&lt;3+&gt; fluorescent powder
  • BiPO4: Eu&lt;3+&gt; fluorescent powder synthesized with help of surfactant CTAB (Cetyltrimethyl Ammonium Bromide) and method for synthesizing BiPO4: Eu&lt;3+&gt; fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the present invention comprises the following steps:

[0033] (1) Take Bi(NO 3 ) 3 ·5H 2 O, 0.1mol / L Eu(NO 3 ) 3 solution, 0~0.6mol / L CTAB solution and 0.2mol / L NH 4 h 2 PO 4 solution, for later use; CTAB solution is to add CTAB to deionized water, heat to 40-50°C and stir for 20-30min to dissolve it, and wait for it to cool to room temperature for later use;

[0034] (2) Take step 1) spare Bi(NO 3 ) 3 ·5H 2 O and Eu(NO 3 ) 3 Mix the solutions, dissolve them in a nitric acid solution with a volume fraction of 13% to 13.6%, and stir for 10 to 15 minutes to obtain a mixed solution A uniformly. Then add CTAB solution dropwise to mixed solution A to obtain mixed solution B, and stir for 20-30 minutes to generate Bi x Eu 1-x NO 3 , and then add NH dropwise to the mixed solution B 4 h 2 PO 4 solution, continue to stir for 20-30min until the reagent is fully dissolved to obtain a mixed solution C; where Bi(NO 3 ) 3 , Eu(NO 3 ) 3 ...

Embodiment 1

[0041] (1) to Bi(NO 3 ) 3 ·5H 2 Add 0.1mol / L Eu(NO 3 ) 3 Mix the solution thoroughly, then dissolve it in 10mL nitric acid solution with a volume fraction of 13%, and stir it magnetically for 15 minutes to obtain a mixed solution A;

[0042] (2) Weigh 1mmol CTAB and put it into 10mL deionized water, heat and stir to dissolve it, and obtain a CTAB solution with a concentration of 0.1mol / L; after it is cooled to room temperature, slowly add it to the mixed solution obtained in step (1) A, and additionally stirred for 30min to obtain mixed solution B;

[0043] (3) Weigh 4mmolNH 4 h 2 PO 4 Dissolved in 20mL deionized water to prepare 0.2mol / L NH 4 h 2 PO 4 Solution, it is added dropwise in the mixed solution B of step (2) gained, stirs 30min, guarantees that it mixes evenly, obtains mixed solution C; Wherein Bi(NO 3 ) 3 , Eu(NO 3 ) 3 , nitric acid solution, CTAB and NH 4 h 2 PO 4 The ratio is 0.95mmol:0.05mmol:2.5mL:0.25mmol:1mmol.

[0044] (4) adjust the pH of t...

Embodiment 2

[0048] Since the previous research on the amount of CTAB added has proved that adding too much CTAB will result in samples with a hexagonal phase structure that is not conducive to enhancing the luminescence performance, so this example studies the impact of CTAB on the morphology, structure and luminescence performance by changing the amount of CTAB added. Impact.

[0049] Replace the CTAB solution with a concentration of 0.1mol / L with CTAB solutions with a concentration of 0mol / L, 0.2mol / L, 0.3mol / L, 0.4mol / L, and 0.6mol / L, and slowly add them to the mixed solution A ; Other conditions are the same as in Example 1. At this time CTAB and NH 4 h 2 PO 4 The ratios are 0, 0.5, 0.75, 1 and 1.5, respectively.

[0050] Where the concentration of CTAB solution is 0mol / L, 10mL deionized water is added directly.

[0051] figure 1 It is the auxiliary synthesis of Bi with different CTAB additions 0.95 PO 4 :0.05Eu 3+ XRD pattern of phosphor powder. It can be seen from the figu...

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Abstract

The invention relates to BiPO4: Eu<3+> fluorescent powder synthesized with the help of a surfactant CTAB (Cetyltrimethyl Ammonium Bromide) and a method for synthesizing the BiPO4: Eu<3+> fluorescent powder. The method comprises the following steps: firstly, mixing Bi(NO3)3 and Eu(NO3) solutions and adding a mixed solution into a nitric acid solution; stirring uniformly and then dropwise adding a CTAB solution; stirring and reacting to generate BixEu1-xNO3; then dropwise adding an NH4H2PO4 solution, and continually stirring until the NH4H2PO4 solution is sufficiently dissolved; adjusting the pH (Potential of Hydrogen) value of the mixed solution to 0.5 to 0.6; reacting at 160 DEG C to 165 DEG C to generate sediment; when the sediment is not increased, naturally cooling to room temperature; centrifuging and separating the obtained sediment, washing and drying, thus finally obtaining the BiPO4: Eu<3+> fluorescent powder synthesized with the help of the surfactant CTAB. By adjusting the adding amount of the CTAB and controlling the shape and structure of a product, the prepared BiPO4: Eu<3+> fluorescent powder has high crystallization degree and high luminous intensity.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of rare earth luminescent materials, and relates to a method for synthesizing BiPO assisted by a surfactant CTAB 4 :Eu 3+ Phosphor powder and methods 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 great valu...

Claims

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Application Information

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IPC IPC(8): C09K11/74
CPCC09K11/7728
Inventor 刘运马随艳史晓磊
Owner SHAANXI UNIV OF SCI & TECH
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