Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF3 Cites 11 Cited by
  • Summary
  • 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 spherical micron-sized materials, and there are few reports on one-dimensional rod-shaped / linear rare-earth green nano-phosphors.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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
Effect test

Embodiment 1

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

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

[0064] Step 1: Prepare La separately 3+ 、Ce 3+ , Tb 3+ Saline solution and PO 4 3- saline solution;

[0065] La 3+ 、Ce 3+ , Tb 3+ Saline solution and PO 4 3- The saline solution was prepared with soluble La commonly used in this field. 3+ 、Ce 3+ , Tb 3+ Salt and soluble orthophosphoric acid (PO 4 3- ) salt as the solute and water as 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- ) salts can be sodium phosphate, ammonium phosphate or potassium phosphate, etc., such as ...

Embodiment 2

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

[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 phosphate [Na 2 HPO 4 2H 2 O], be prepared with deionized water to be lanthanum nitrate, cerium nitrate, terbium nitrate aqueous solution and disodium hydrogen phosphate aqueous solution with the concentration of 0.1 mol / liter respectively, and press La 3+ : Ce 3+ :Tb 3+ The molar ratio is 0.60:0.20:0.20, respectively measure different volumes of lanthanum nitrate, cerium nitrate, and terbium nitrate aqueous solution to prepare La 3+ Ce 3+ Tb 3+ 25 ml of the mixed solution, the La 3+ Ce 3+ Tb 3+ The mixed solution was placed in an Erlenmeyer flask, stirred with a magnetic stirrer at a speed of 180 rpm, and 25 milliliters of the 0.1 mol / liter dis...

Embodiment 3

[0080] Embodiment 3 (implementation condition: La 3+ : Ce 3+ :Tb 3+ The molar ratio is 0.56:0.16:0.28, pH=0.5, aged 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 phosphate [Na 2 HPO 4 2H 2 O], be prepared with deionized water to be lanthanum nitrate, cerium nitrate, terbium nitrate aqueous solution and disodium hydrogen phosphate aqueous solution with the concentration of 0.1 mol / liter respectively, and press La 3+ : Ce 3+ :Tb 3+ The molar ratio is 0.56:0.16:0.28, respectively measure different volumes of lanthanum nitrate, cerium nitrate, and terbium nitrate aqueous solution 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, stirred with a magnetic stirrer at a speed of 150 rpm, and 25 milliliters of the 0.1 mol / liter disodium hydrogen phosphate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K11/81B82Y40/00B82Y30/00
Inventor 周晓明孙灵娜
Owner SHENZHEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com