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Method for preparing calcium tungstate europium-doped nano material using sodium tungstate

A nanomaterial, calcium tungstate technology, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problem of easy agglomeration of nanomaterials, and achieve the effect of material stability, wide application fields, and easy control.

Inactive Publication Date: 2007-07-11
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing calcium tungstate-doped europium nanomaterials by using sodium tungstate, which solves the problem of easy agglomeration in the preparation of nanomaterials

Method used

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  • Method for preparing calcium tungstate europium-doped nano material using sodium tungstate

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Embodiment Construction

[0014] 1. Take 30ml 0.5mol / L sodium tungstate solution, 30ml ammonium citrate solution with a mass fraction of 10%, and 3.0g surfactant (CTAB) into the beaker in turn, stir well and mix well.

[0015] 2. Take 30ml of 0.5mol / L calcium chloride solution and 6.0ml of 0.1mol / L europium chloride solution, mix them, and pour them into a separatory funnel.

[0016] 3. Slowly drop the mixed solution of calcium chloride and europium chloride into the beaker of the mixed solution obtained in the first step from the separating funnel, and at the same time, magnetically stir the solution in the beaker, and a white precipitate is formed.

[0017] 4. After the titration is completed, continue magnetic stirring for 30 minutes, then take out the suspension and put it into a centrifuge for centrifugation.

[0018] 5. Take out the centrifuged precipitate, put it into an oven for heat treatment at 110°C for 4 hours, and then put the obtained solid into an electric furnace for heat treatment at 6...

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Abstract

The invention discloses a making method of calcium tungstate with doped europium nanometer material through sodium tungstate in the inorganic chemical technical domain, which is characterized by the following: weighing 25-35ml 0.4-0.5mol / l sodium tungstate solution, 25-35ml 9%-11% ammonium citrate solution and 2. 5-3. 5g hexadecyl trimethyl-ammonium bromide as surface activator to add in the beaker sequently; stirring evenly; blending 25-30ml 0.4-0.5mol / l calcium chloride solution and 5. 5-6. 5ml 0.9-1. 1mol / l europium chloride solution; pouring compound in the separatory funnel; dripping composite solution of calcium chloride and europium chloride into beaker through separatory funnel; stirring through magnetic force; generating white sediment; fetching suspension; placing the suspension in the centrifuger; putting in the toaster to do heat disposal at 100-120 deg. c; placing the solid in the electric furnace to do heat disposal at 550-650 deg. c; grinding solid for 30-40 min to obtain the product.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical engineering, and in particular provides a method for preparing calcium tungstate-doped europium nanomaterials by using sodium tungstate, and using chemicals to prepare calcium tungstate-doped europium nanomaterials. Background technique [0002] CaWO with scheelite structure 4 Phosphors were discovered in 1896 and soon used as the first X-ray luminescent materials, and are still used today almost a century later. wxya 4 It is a typical self-activated phosphor that produces highly efficient blue light under excitation by X-rays, electron beams, and UV light. In the 1970s and 1980s, Powell et al. 4 and Eu 3+ doped CaWO 4 The luminescence and energy transfer of the system are studied in depth. In the last two years, it has been found that in some Eu-doped 3+ Among the tungsten (molybdenum) salts, high-efficiency red fluorescence can be generated under near-UV light excitation, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
Inventor 曹林赵婕羊富强
Owner UNIV OF SCI & TECH BEIJING
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