Nano lamellar compound rare-earth hydroxide and preparation method thereof

A rare earth hydroxide, layered technology, applied in chemical instruments and methods, luminescent materials, etc., to achieve the effects of good crystal shape, good dispersion and high particle purity

Inactive Publication Date: 2012-07-11
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010]However, the LRHs prepared by the above two traditional methods need to fine-tune the pH of the solution, which increases the difficulty of the reaction; the reaction time is generally 6 – 48h, and the reaction time long; and the particle size of the prepared product is generally large (greater than 1 μM), and it is easy to aggregate, which is not conducive to the application of LRHs in biology and other aspects

Method used

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  • Nano lamellar compound rare-earth hydroxide and preparation method thereof
  • Nano lamellar compound rare-earth hydroxide and preparation method thereof
  • Nano lamellar compound rare-earth hydroxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Dissolve yttrium chloride and surfactant polyethyleneimine in deionized water respectively, the concentration of yttrium chloride is 0.1 mol / L, and the volume ratio of polyethyleneimine mass to solvent is 1 g:50 mL ;

[0042] (2) Add 1 mL of yttrium chloride solution, 15 mL of ethanol, and 1 mL of polyethyleneimine solution into the reaction kettle in sequence, and vigorously stir for 5 to 10 minutes at room temperature under the protection of a nitrogen atmosphere to make the solutions evenly mixed.

[0043] (3) Move the reactor into a preheated furnace for crystallization at 80 oC for 2.5 h.

[0044] (4) Allow the reactor to cool down at room temperature, centrifuge the resulting solution, wash with deionized water and absolute ethanol three times, and then dissolve in 5 mL of deionized water to obtain an aqueous solution of yttrium nanolayered hydroxide.

Embodiment 2

[0046] (1) Dissolve yttrium chloride and surfactant polyethyleneimine in deionized water respectively, the concentration of yttrium chloride is 0.5 mol / L, and the volume ratio of polyethyleneimine mass to solvent is 1 g:50 mL ;

[0047] (2) Add 1 mL of yttrium chloride solution, 15 mL of ethanol, and 5 mL of polyethyleneimine solution into the reaction kettle in sequence, and vigorously stir for 5 to 10 minutes at room temperature under the protection of a nitrogen atmosphere to make the solutions evenly mixed.

[0048] (3) Move the reactor into a preheated furnace for crystallization at 100 oC for 2.5 h.

[0049] (4) Allow the reactor to cool down at room temperature, centrifuge the resulting solution, wash with deionized water and absolute ethanol three times, and then dissolve in 5 mL of deionized water to obtain an aqueous solution of yttrium nanolayered hydroxide.

Embodiment 3

[0051] (1) Dissolve yttrium chloride and surfactant polyethyleneimine in deionized water respectively, the concentration of yttrium chloride is 0.5 mol / L, and the volume ratio of polyethyleneimine mass to solvent is 1 g:50 mL ;

[0052] (2) Add 1 mL of yttrium chloride solution, 15 mL of ethanol, and 5 mL of polyethyleneimine solution into the reaction kettle in sequence, and vigorously stir for 5 to 10 minutes at room temperature under the protection of a nitrogen atmosphere to make the solutions evenly mixed.

[0053] (3) Move the reactor into a preheated furnace for crystallization at 160 oC for 2.5 h.

[0054] (4) Allow the reactor to cool down at room temperature, centrifuge the resulting solution, wash with deionized water and absolute ethanol three times, and then dissolve in 5 mL of deionized water to obtain an aqueous solution of yttrium nanolayered hydroxide.

[0055] Ion exchange of yttrium nanolayered hydroxides: Typically, one part of the prepared LYH is dissolve...

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Abstract

The invention relates to a nanoscale lamellar rare-earth hydroxide functional material and a preparation method thereof. According to the invention, the characteristic that metal ions are uniformly distributed in a lamellar rare-earth hydroxide laminate is utilized, rare-earth metal ions with similar radiuses are selected for carrying out isomorphous substitution, and a polyethyleneimine synthesis method is adopted for preparing the lamellar compound rare-earth hydroxide with the chemical formula of being RE2(OH)5Cl nH2O. Dimension of the prepared rare-earth hydroxide can be adjusted within the range from nanometer to micrometer, and isomorphous substitution by virtue of different rare-earth ions is carried out, thus a product can have a bright fluorescent light (blue light to near infrared light) with adjustable emission wavelength. According to the invention, a compound lamellar optical functional material system with uniform composition, adjustable dimension, good crystallinity, laminate rare earth ions which can be doped and exchangeable interlayer anions is constructed, and the preparation method is simple, practicable, rapid and convenient.

Description

[0001] technical field [0002] The invention belongs to the field of preparation of inorganic functional materials, in particular to a layered composite rare earth hydroxide functional material and a preparation method thereof. [0003] Background technique [0004] Rare earth elements are the general term for scandium, yttrium and lanthanide elements in Group IIIB of the periodic table. Rare earth elements have a unique 4f electron layer structure, which leads to many unique physical and chemical properties of rare earth-containing compounds. Therefore, they are widely used in the fields of light, electricity, magnetism, and catalysis, and have the reputation of industrial monosodium glutamate. In the application and development of rare earth functional materials, rare earth luminescent materials have the advantages of rich fluorescence spectrum lines, long fluorescence lifetime and good stability, so they are particularly attractive. Based on the multifunctional prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/61C09K11/02
Inventor 喻学锋向阳何定飞张大全孙天瀛
Owner WUHAN UNIV
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