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A kind of preparation method of spindle-shaped lead tungstate crystal

A lead tungstate spindle and crystal technology is applied in the field of preparation of lead tungstate spindle-shaped crystals, which can solve the problems of polluted environment and complicated operation, and achieve the effects of large specific surface area, simple operation and simple process.

Inactive Publication Date: 2016-04-13
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the crystal morphology of lead tungstate is usually controlled by means of surfactants, which has the disadvantages of complex operation and environmental pollution.

Method used

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  • A kind of preparation method of spindle-shaped lead tungstate crystal
  • A kind of preparation method of spindle-shaped lead tungstate crystal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, dissolving disodium edetate in deionized water to form an aqueous solution of disodium edetate, adjusting the concentration of edetate in the solution to 0.04mol / L;

[0024] Step 2, dissolve lead nitrate in deionized water to form lead nitrate aqueous solution, adjust the Pb in the solution 2+ The ion concentration is 0.04mol / L;

[0025] Step 3, mixing the disodium edetate aqueous solution prepared in step 1 with the lead nitrate aqueous solution prepared in step 2, the mixing molar ratio of disodium edetate and lead nitrate is 1:1 to obtain ethylenediaminetetraacetic acid Lead amine tetraacetate precipitation solution, let stand for 0.5 hour;

[0026] Step 4. Dissolve sodium tungstate in deionized water to form an aqueous solution of sodium tungstate, and adjust the WO in the solution 4 2- The ion concentration is 0.04mol / L;

[0027] Step five, the aqueous sodium tungstate solution prepared in step four is mixed with the lead edetate precipitation solution ...

Embodiment 2

[0030] Step 1, dissolving disodium edetate in deionized water to form an aqueous solution of disodium edetate, adjusting the concentration of edetate in the solution to 1.1 mol / L;

[0031] Step 2, dissolve lead nitrate in deionized water to form lead nitrate aqueous solution, adjust the Pb in the solution 2+ The ion concentration is 1.1mol / L;

[0032] Step 3, mixing the disodium edetate aqueous solution prepared in step 1 with the lead nitrate aqueous solution prepared in step 2, the mixing molar ratio of disodium edetate and lead nitrate is 1:1 to obtain ethylenediaminetetraacetic acid Lead amine tetraacetate precipitation solution, let stand for 40 minutes;

[0033] Step 4. Dissolve sodium tungstate in deionized water to form an aqueous solution of sodium tungstate, and adjust the WO in the solution 4 2- The ion concentration is 1.1mol / L;

[0034] Step five, the aqueous sodium tungstate solution prepared in step four is mixed with the lead edetate precipitation solution ...

Embodiment 3

[0036] Step 1, dissolving disodium edetate in deionized water to form an aqueous solution of disodium edetate, adjusting the concentration of edetate in the solution to 2.0 mol / L;

[0037] Step 2, dissolve lead nitrate in deionized water to form lead nitrate aqueous solution, adjust the Pb in the solution 2+ The ion concentration is 2.0mol / L;

[0038] Step 3, mixing the disodium edetate aqueous solution prepared in step 1 with the lead nitrate aqueous solution prepared in step 2, the mixing molar ratio of disodium edetate and lead nitrate is 1:1 to obtain ethylenediaminetetraacetic acid Lead amine tetraacetate precipitation solution, leave standstill for 50 minutes;

[0039] Step 4. Dissolve sodium tungstate in deionized water to form an aqueous solution of sodium tungstate, and adjust the WO in the solution 4 2- The ion concentration is 2.0mol / L;

[0040] Step five, the aqueous sodium tungstate solution prepared in step four is mixed with the lead edetate precipitation so...

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Abstract

The invention discloses a preparation method of lead tungstate spindle-shaped crystals. The preparation method comprises the following steps: mixing an aqueous solution of disodium ethylene diamine tetraacetate and an aqueous solution of lead nitrate to obtain an EDTA lead precipitate solution, mixing the EDTA lead precipitate solution with an aqueous solution of sodium tungstate, putting a container filled with the mixed solution into an ultrasonic device for ultrasonic treatment, repeatedly washing a reaction product with distilled water, filtering, and drying at 50 DEG C to obtain the lead tungstate spindle-shaped crystals. The preparation method has advantages of simple technology, controllable morphology and large specific surface area, requires no organic surfactant and is easy to realize industrialization.

Description

technical field [0001] The invention relates to a method for preparing spindle-shaped lead tungstate crystals, in particular to a method for preparing spindle-shaped lead tungstate crystals using lead ethylenediamine tetraacetate precipitation solution as a reaction precursor. Background technique [0002] Lead tungstate is an important inorganic scintillator material. Due to its excellent scintillation performance, short decay time, high irradiation hardness, high density and low price, it is widely used in photocatalysis, microwave, scintillator, luminescence, optical fiber, Detectors and many other fields have a very wide range of uses, and are one of the research hotspots in recent years. It is well known that the performance of nanomaterials depends on factors such as the shape and size of nanocrystals, especially there is a strong correlation between the shape and size of nanomaterials and photoluminescent properties, so tungstic acid with special morphology is prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/60C30B29/32C30B7/14C01G41/00C09K11/68B82Y40/00
Inventor 王永刚杨琳琳王晓峰王玉江王黎徐国辉
Owner LUOYANG INST OF SCI & TECH
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