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Method for preparing Ln2O3:RE<3+> and Ln2O3:RE<3+>@SiO2 monodisperse rare earth nano particles

A nanoparticle, monodisperse technology, applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., to achieve the effect of simple method, long fluorescence lifetime and reliable production process

Inactive Publication Date: 2011-01-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of uniform monodisperse spherical rare earth-doped nanoluminescent particles with a size of about 100 nm has been seldom reported.

Method used

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  • Method for preparing Ln2O3:RE&lt;3+&gt; and Ln2O3:RE&lt;3+&gt;@SiO2 monodisperse rare earth nano particles
  • Method for preparing Ln2O3:RE&lt;3+&gt; and Ln2O3:RE&lt;3+&gt;@SiO2 monodisperse rare earth nano particles
  • Method for preparing Ln2O3:RE&lt;3+&gt; and Ln2O3:RE&lt;3+&gt;@SiO2 monodisperse rare earth nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of monodisperse rare earth oxide nanoparticles is as follows, which is divided into two steps:

[0027] 1. Synthesis of Gd(OH) 3 :Eu 3+ Nanospheres:

[0028] Add 0.2 g of Gd(NO 3 ) 3 ·5H 2 O powder, 0.01 g Eu(NO 3 ) 3 ·5H 2 O, 0.504 g CTAB and 0.0032 g FeCl 6H 2 O, so that the molar ratio is 1.0Gd(NO 3 ) 3 ·5H 2 O: 0.05Eu(NO 3 ) 3 ·5H 2 O: 3CTAB: 0.025FeCl 3 ·6H 2 O, stir for 30 minutes to make it evenly mixed; then add 0.2 g of PVP at one time, stop stirring for 12 hours, put it into the reaction kettle, and crystallize at 180°C to obtain monodisperse particles with a diameter of about 100 nanometers Gd(OH) 3 :Eu 3+ Nanospheres; Gd(OH) can be obtained by drying at 60°C after washing by centrifugation 3 :Eu 3+ Nanosphere samples;

[0029] 2. Gd 2 o 3 :Eu 3+ Synthesis

[0030] Gd(OH) prepared by step 1 3 :Eu 3+ Nanospheres were annealed in a muffle furnace at 550°C for 4 hours to make the Gd(OH) 3 :Eu 3+ Nanosphere Nan...

Embodiment 2

[0032] The preparation process of monodisperse rare earth oxide nano-luminescent materials is as follows, which is divided into two steps:

[0033] 1. Synthesis of La(OH) 3 :Eu 3+ Nanospheres:

[0034] Add 0.19 g La(NO 3 ) 3 ·5H 2 O powder, 0.01 g Eu(NO 3 ) 3 ·5H 2 O, 0.504 g CTAB and 0.0032 g FeCl 3 ·6H 2 O, so that its molar ratio is 1.0La(NO 3 ) 3 ·5H 2 O: 0.05Eu(NO 3 ) 3 ·5H 2 O: 3CTAB: 0.025FeCl 3 ·6H 2 O, stirred for 30 minutes to make it evenly mixed; then added 0.2 g of PVP at one time, stopped after 12 hours of stirring, put it into the reaction kettle, and internally crystallized at 180 ° C to obtain a single crystal with a diameter of about 100 nanometers. Disperse La(OH) 3 :Eu 3+ Nanospheres; La(OH) can be obtained by drying at 60°C after washing by centrifugation 3 :Eu 3+ sample;

[0035] 2. La 2 o 3 :Eu 3+ Synthesis

[0036] La(OH) prepared by step 1 3 :Eu 3+ Nanospheres were annealed in a muffle furnace at 550°C for 4 hours to make La...

Embodiment 3

[0038] The preparation process of monodisperse rare earth oxide nano-luminescent materials is as follows, which is divided into two steps:

[0039] 1. Synthesis of Y(OH) 3 :Eu 3+ Nanospheres:

[0040] Add 0.24 g of Y(NO 3 ) 3 ·5H 2 O powder, 0.01 g Eu(NO 3 ) 3 ·5H 2 O, 0.504 g CTAB and 0.0056 g AgNO 3 , so that the molar ratio is 1.0Y(NO 3 ) 3 ·5H 2 O: 0.05Eu(NO 3 ) 3 ·5H 2 O: 3CTAB: 0.05AgNO 3 , stirred for 30 minutes to make it evenly mixed; then added 0.2 g of PVP at one time, stopped after 12 hours of stirring, put it into the reaction kettle, and crystallized at 180°C to obtain a monodisperse Y with a diameter of about 100 nanometers. (OH) 3 :Eu 3+ Nanospheres; Y(OH) can be obtained by drying at 60°C after centrifugal washing 3 :Eu 3+ sample;

[0041] 2. Y 2 o 3 :Eu 3+ Synthesis

[0042] Y(OH) prepared by step 1 3 :Eu 3+ Nanospheres were annealed in a muffle furnace at 550°C for 4 hours to make Y(OH) 3 :Eu 3+ Nanospheres Nanospheres transform i...

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Abstract

The invention belongs to the technical field of rare earth materials and in particular relates to a method for preparing Ln2O3:RE<3+> and Ln2O3:RE<3+>@SiO2 monodisperse spherical rare earth oxide (REO) nano particles with uniform size. The Ln2O3:RE<3+> nano particles are in spherical shapes, and a SiO2 shell layer can be coated outside Ln(OH)3:RE<3+> nano sphere through controlling the experimental condition; the thickness of the shell layer can be regulated, and then Ln2O3:RE<3+>SiO2 can be obtained through firing; and the Ln2O3:RE<3+>SiO2 can be dispersed into an aqueous solution to form a stable hydrosol. When the nano particle product is used as a developer, the product has better stability, difficult decomposition and good light stability compared with clinically used organic dyes, is safer than radioactive elements and has attractive prospect in the aspects of biomedical imaging and fluorescent calibration. The invention has the advantages of simple operation, good repeatability, wide scope of application, stable physical and chemical properties of prepared materials, and the like.

Description

technical field [0001] The invention belongs to the technical field of rare earth materials, in particular to a class of Ln with uniform size 2 o 3 :RE 3+ and Ln 2 o 3 :RE 3+ @SiO 2 A method for preparing monodisperse spherical rare earth-doped nano-luminescent particles. Background technique [0002] Rare earth-doped nano-luminescent particles have a wide range of potential applications in lighting, high-resolution fluorescent display, biological imaging, fluorescent labeling and disease diagnosis, and have attracted widespread attention. In the past few decades, a large number of one-dimensional and two-dimensional nano / submicron rare earth-doped nanoluminescent particles in the form of rods, fibers, ribbons and sheets have been synthesized. Recently, monodisperse and uniform spherical rare earth-doped nanoluminescent particles have been widely used in the fields of bioimaging and fluorescent labeling due to their unique morphology and physical and chemical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00
Inventor 王宇宋宏伟董彪白雪
Owner JILIN UNIV
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