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Praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder and its preparation method and use

A nano-powder and lanthanum fluoride technology, which is applied in the field of organic-inorganic hybrid nano-powder and its preparation, can solve the problems of low energy, large energy loss, and high cost of red, green, and blue light, and achieve simple preparation methods and convenient use and maintenance. , The effect of simple process

Active Publication Date: 2016-11-09
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this approach can obtain white light, it also has shortcomings. First, the energy loss in the energy conversion process is relatively large, and the energy of the red, green and blue light obtained is low, which will greatly affect the lumen efficiency and color reproduction of the LED. Second, the process of making white LED devices is complicated and the cost is too high

Method used

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  • Praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder and its preparation method and use
  • Praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder and its preparation method and use
  • Praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder and its preparation method and use

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Embodiment 1

[0036] The concrete steps of preparation are:

[0037] Step 1, first follow La 0.999 PR 0.001 f 3 After weighing the corresponding amount of lanthanum oxide and praseodymium oxide, the lanthanum oxide, praseodymium oxide and 6 mol / L nitric acid aqueous solution were mixed under stirring to prepare a rare earth nitrate aqueous solution with a total rare earth ion concentration of 0.1 mol / L. Then respectively add 0.5mol / L surfactant aqueous solution and ammonium fluoride into the rare earth nitrate aqueous solution, and stir until the reaction is complete to obtain the precursor solution; wherein, the total rare earth ions in the precursor solution, the surfactant aqueous solution The molar ratio of the surfactant and ammonium fluoride is 1:0.5:4, and the surfactant is sodium dodecylbenzenesulfonate.

[0038]In step 2, first place the precursor solution in an airtight state, and react at 140° C. for 24 hours to obtain a reaction solution. Carry out the treatment of solid-liq...

Embodiment 2

[0040] The concrete steps of preparation are:

[0041] Step 1, first follow La 0.995 PR 0.005 f 3 After weighing the corresponding amount of lanthanum oxide and praseodymium oxide, the lanthanum oxide, praseodymium oxide and 9 mol / L nitric acid aqueous solution were mixed under stirring to prepare a rare earth nitrate aqueous solution with a total rare earth ion concentration of 0.2 mol / L. Then respectively add 0.4mol / L surfactant aqueous solution and ammonium fluoride into the rare earth nitrate aqueous solution, stir until the reaction is complete, and obtain the precursor solution; wherein, the total rare earth ions in the precursor solution, the surfactant aqueous solution The molar ratio of the surfactant and ammonium fluoride is 1:0.9:3.8, and the surfactant is sodium dodecylbenzenesulfonate.

[0042] In step 2, first place the precursor solution in an airtight state, and react at 160° C. for 20 hours to obtain a reaction solution. Carry out the processing of solid-l...

Embodiment 3

[0044] The concrete steps of preparation are:

[0045] Step 1, first follow La 0.99 PR 0.01 f 3 After weighing the corresponding amount of lanthanum oxide and praseodymium oxide, the lanthanum oxide, praseodymium oxide and 11mol / L nitric acid aqueous solution were mixed under stirring to prepare a rare earth nitrate aqueous solution with a total rare earth ion concentration of 0.3mol / L. Then respectively add 0.3mol / L surfactant aqueous solution and ammonium fluoride in the rare earth nitrate aqueous solution, and stir until the reaction is complete to obtain the precursor solution; wherein, the total rare earth ions in the precursor solution, the surfactant aqueous solution The molar ratio of the surfactant and ammonium fluoride is 1:1.3:3.5, and the surfactant is sodium dodecylbenzenesulfonate.

[0046] In step 2, first place the precursor solution in an airtight state, and react at 180° C. for 16 hours to obtain a reaction solution. Carry out the processing of solid-liqu...

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Abstract

The invention discloses praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder and its preparation method and use. The nanometer powder has a chemical formula of La1-xPrxF3 and x is greater than or equal to 10<-3> and less than or equal to 10<-1>. Fluorine in La1-xPrxF3 and carbon in a surfactant are connected through a C-F chemical bond to form an organic-inorganic hybrid material and the organic-inorganic hybrid is powder with particle sizes of 20-70nm. The preparation method comprises stirring corresponding amounts of lanthana, praseodymia and a nitric acid aqueous solution according to the chemical formula of La1-xPrxF3 to obtain a rare earth nitrate aqueous solution with the total rare earth ion concentration of 0.1-0.5mol / L, orderly adding a surfactant aqueous solution and ammonium fluoride into the rare earth nitrate aqueous solution, carrying out stirring to obtain a precursor solution, carrying out a reaction process on the precursor solution in an enclosed state to obtain a reaction solution, carrying out solid-liquid separation on the cooled reaction solution, then carrying out washing and then carrying out drying on to obtain a desired product. The praseodymium-doped lanthanum fluoride organic-inorganic hybrid nanometer powder directly emits white light under UV excitation and is conducive to wide commercial application in indoor LED illumination.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid nano-powder, its preparation method and application, in particular to an organic-inorganic hybrid nano-powder with praseodymium doped with lanthanum fluoride, its preparation method and application. Background technique [0002] The technological breakthrough and industrialization of light-emitting diode (LED) and ultraviolet LED in the 1990s greatly promoted the development of semiconductor lighting. Due to the advantages of long life, small size, energy saving and environmental protection, white LED light sources have been rapidly popularized and applied to various fields such as daily life and industrial production. At present, the main way to realize white LED has been as titled "White-Light-Emitting Single Phosphors via Triply Doped LaF 3 Nanoparticles", J.Phys.Chem.C, 2013,117,12229-12238 ("by triple doping LaF 3 Nanoparticle white light phosphor", "Physical Chemistry C Journal" 2013, Volume ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L33/50
CPCC09K11/7772H01L33/502H01L2933/0041Y02B20/00
Inventor 吴红娥费广涛
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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