Preparation method of nanowires of lanthanum phosphate activated by cerium and terbium

A technology of lanthanum cerium terbium phosphate and nanowires, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of reducing production costs and energy consumption

Inactive Publication Date: 2012-06-27
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of lanthanum cerium terbium phosphate green phosphors is mostly the synthesis of granular or sphe

Method used

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  • Preparation method of nanowires of lanthanum phosphate activated by cerium and terbium
  • Preparation method of nanowires of lanthanum phosphate activated by cerium and terbium
  • Preparation method of nanowires of lanthanum phosphate activated by cerium and terbium

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0062] Example 1 (implementation conditions: La 3+ : Ce 3+ : Tb 3+ The molar ratio is 0.68:0.12:0.20, pH=1, 20℃ room temperature, aging for 32 hours)

[0063] The specific implementation steps of the preparation method of lanthanum cerium terbium phosphate nanowires provided by the present invention are as follows:

[0064] Step 1: Prepare La separately 3+ , Ce 3+ , Tb 3+ Salt solution and PO 4 3- Salt solution

[0065] La 3+ , Ce 3+ , Tb 3+ Salt solution and PO 4 3- The salt solution is soluble La 3+ , Ce 3+ , Tb 3+ Salt and soluble orthophosphoric acid (PO 4 3- ) Salt is the solute and water is the solvent. For example, soluble La 3+ , Ce 3+ , Tb 3+ The salt can be lanthanum nitrate, cerium nitrate, terbium nitrate, lanthanum chloride, cerium chloride, terbium chloride, etc. The soluble orthophosphoric acid (PO 4 3- ) The salt can be sodium phosphate, ammonium phosphate or potassium phosphate, such as diammonium phosphate, ammonium dihydrogen phosphate, disodium hydrogen phosphate,...

Example Embodiment

[0078] Example 2 (Implementation conditions: La 3+ : Ce 3+ : Tb 3+ The molar ratio is 0.6:0.2:0.2, pH=1, aging at room temperature at 23°C for 48 hours)

[0079] Weigh a certain mass of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O], cerium nitrate [Ce(NO 3 ) 3 ·6H 2 O], terbium nitrate [Tb(NO 3 ) 3 ·6H 2 O] and disodium hydrogen phosphate [Na 2 HPO 4 ·2H 2 O], respectively prepare lanthanum nitrate, cerium nitrate, terbium nitrate aqueous solution and disodium hydrogen phosphate aqueous solution with a concentration of 0.1 mol / L with deionized water, and press La 3+ : Ce 3+ : Tb 3+ The molar ratio is 0.60∶0.20∶0.20, and different volumes of lanthanum nitrate, cerium nitrate, and terbium nitrate aqueous solutions are respectively measured to prepare La 3+ Ce 3+ Tb 3+ 25 ml of mixed solution, the La 3+ Ce 3+ Tb 3+ The mixed solution was placed in an Erlenmeyer flask and stirred with a magnetic stirrer at a speed of 180 revolutions per minute. While stirring, 25 ml of the 0.1 mol / L disodium ...

Example Embodiment

[0080] Example 3 (Implementation conditions: La 3+ : Ce 3+ : Tb 3+ The molar ratio is 0.56:0.16:0.28, pH=0.5, aging at room temperature at 23°C for 24h)

[0081] Weigh a certain mass of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O], cerium nitrate [Ce(NO 3 ) 3 ·6H 2 O], terbium nitrate [Tb(NO 3 ) 3 ·6H 2 O] and disodium hydrogen phosphate [Na 2 HPO 4 ·2H 2 O], respectively use deionized water to prepare lanthanum nitrate, cerium nitrate, terbium nitrate aqueous solution and disodium hydrogen phosphate aqueous solution with a concentration of 0.1 mol / L, and press La 3+ : Ce 3+ : Tb 3+ The molar ratio is 0.56∶0.16∶0.28, and different volumes of lanthanum nitrate, cerium nitrate, and terbium nitrate aqueous solutions are respectively measured to prepare La 3+ Ce 3+ Tb 3+ 25 ml of mixed solution. Will the La 3+ Ce 3+ Tb 3+ The mixed solution was placed in an Erlenmeyer flask and stirred with a magnetic stirrer at a speed of 150 revolutions per minute. While stirring, 25 ml of the 0.1 mol / L d...

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Abstract

The invention provides a preparation method of green fluorescent powder made of a one-dimensional nano-structure material of lanthanum phosphate activated by cerium and terbium. The preparation method comprises the following steps of: respectively preparing salt solutions of La<3+>, Ce<3+> and Tb<3+> and a PO4<3-> salt solution, mixing the salt solutions of the La<3+>, the Ce<3+> and the Tb<3+> according to a certain molar ratio, and then mixing with the PO4<3-> salt solution to prepare a mixed solution; regulating the pH value of the mixed solution to 0.5-8; stirring the mixed solution for 0.3-2 hours; and aging the mixed solution in a water bath at room temperature or the temperature of 7 DEG C-95 DEG C for more than one hour under environmental pressure so as to prepare the nanowires of the lanthanum phosphate activated by the cerium and the terbium, namely (La, Ce, Tb)PO4. The preparation method can be implemented by adopting simple and cheap equipment under the environmental pressure, so that production cost can be greatly reduced and industrial production is easy to realize; and adding of a template agent is not required during the preparation process, and environmental effects which are possibly caused by waste liquid are avoided. According to the preparation method disclosed by the invention, the nanowires of the green fluorescent powder of the (La, Ce, Tb)PO4 can be synthesized by water phase/low temperature/normal pressure, the particle size is uniform, the method is simple and convenient, and the energy consumption is low.

Description

technical field [0001] The invention belongs to the field of nanometer material technology and rare earth green fluorescent powder production, and in particular relates to a preparation method of composite rare earth phosphate nanowire. Background technique [0002] At present, the green luminescent materials used in the production of energy-saving lamps are mainly aluminate systems and phosphate systems. Among the three primary color phosphors, the green phosphor plays a major role in the luminous efficiency and luminous flux maintenance rate of the lamp. Therefore, through the improvement of the synthesis process, the crystallographic appearance of the phosphor is controlled, and its quantum efficiency is improved. It is of great significance to add value and reduce production cost. [0003] Rare earth lanthanum cerium terbium ((La, Ce, Tb)PO 4 , referred to as LAP) is an important class of green phosphors in the trichromatic phosphors. 11 o 19 , referred to as CAT) is...

Claims

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Application Information

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IPC IPC(8): C09K11/81B82Y40/00B82Y30/00
Inventor 周晓明孙灵娜
Owner SHENZHEN UNIV
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