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Hydro-thermal synthesis process of microemulsion of amphipathic rare-earth nano material

A rare earth nanomaterial and hydrothermal synthesis technology, applied in the field of nanomaterials, can solve the problems of high cost and complex process of rare earth nanomaterials, and achieve the effects of low cost, great application value and good amphiphilicity

Inactive Publication Date: 2010-12-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commonly used improvement strategy is to coat a layer of SiO on the surface of rare earth nanomaterials. 2 Or polymer materials, this kind of encapsulation can improve water solubility and provide active functional groups, but the process of rare earth nanomaterials required for this two-step synthesis is complicated and costly

Method used

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  • Hydro-thermal synthesis process of microemulsion of amphipathic rare-earth nano material
  • Hydro-thermal synthesis process of microemulsion of amphipathic rare-earth nano material
  • Hydro-thermal synthesis process of microemulsion of amphipathic rare-earth nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 prepares amphiphilic NaYF 4 : 20mol% Yb, 2mol% Er nanoparticles

[0025] With 40mL n-heptane as the oil phase, AOT (0.075M) as the surfactant, 6-aminocaproic acid aqueous solution (0.4mL, 0.375mol / L, serving as a bifunctional ligand) and rare earth chloride aqueous solution (0.2ml , 0.5mol / L LnCl 3 , Ln: 78mol%Y+20mol%Yb+2mol%Er) is the water phase, and the first inverse microemulsion system is prepared. The second inverse microemulsion system was prepared with 40mL n-heptane as the oil phase, AOT (0.075M) as the surfactant, and NaF aqueous solution (0.6ml, 1mol / L) as the water phase. The two inverse microemulsion systems were stirred for about 1 hour respectively to obtain a very clear colorless solution, and then they were mixed and stirred for about 20 minutes. The mixture was transferred to a 100mL hydrothermal kettle, packaged, and hydrothermally treated at 180°C for 6h. After natural cooling, an appropriate amount of acetone was added to break the...

Embodiment 2

[0026] Embodiment 2 prepares amphiphilic LaF 3 : 20mol% Yb, 2mol% Tm nanoparticles

[0027] With 40mL n-heptane as the oil phase, AOT (0.075M) as the surfactant, 6-aminocaproic acid aqueous solution (0.4mL, 0.5mol / L, serving as a bifunctional ligand) and rare earth chloride aqueous solution (0.2ml , 0.5mol / L LnNO 3 , Ln: 78mol%La+20mol%Yb+2mol%Tm) is the water phase, and the first inverse microemulsion system is prepared. Use 40mL n-heptane as the oil phase, AOT (0.075M) as the surfactant, and NH 4F aqueous solution (0.6ml, 1mol / L) was used as the water phase, and the second reversed-phase microemulsion system was prepared. The two inverse microemulsion systems were stirred for about 1 hour respectively to obtain a very clear colorless solution, and then they were mixed and stirred for about 20 minutes. The mixture was transferred to a 100 mL hydrothermal kettle, packaged, and hydrothermally treated at 160° C. for 10 h. After natural cooling, an appropriate amount of acet...

Embodiment 3

[0028] Embodiment 3 prepares amphiphilic YVO 4 : 45mol% Ce, 15mol% Tb nanoparticles

[0029] With 40mL n-heptane as the oil phase, LAS (0.05M) as the surfactant, 12-aminododecanoic acid aqueous solution (0.4mL, 0.375mol / L, serving as a bifunctional ligand) and rare earth chloride aqueous solution (0.2 ml, 0.5mol / L LnCl 3 , Ln: 40mol%Y+45mol%Ce+15mol%Tb) is the water phase, and the first inverse microemulsion system is prepared. With 40mL n-heptane as oil phase, LAS (0.05M) as surfactant, Na 3 VO 4 The aqueous solution (0.6ml, 0.3mol / L) was used as the water phase, and the second inverse microemulsion system was prepared. The two inverse microemulsion systems were stirred for about 1 hour respectively to obtain a very clear colorless solution, and then they were mixed and stirred for about 20 minutes. The mixture was transferred to a 100mL hydrothermal kettle, packaged, and hydrothermally treated at 160°C for 6h. After natural cooling, an appropriate amount of acetone was...

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Abstract

The invention belongs to the technical field of nano materials, in particular to a microemulsion hydrothermal synthesizing method for an amphipathy rare earth nano material. In the method, the water solution of rare earth compound and the water solution of double-function ligand are taken as the water phase, a non-polar organic solvent is taken as the oil phase and a surfactant is added for preparing an inverting microemulsion system. The water solution of fluoride or phosphate or vanadate is taken as the water phase, the non-polar organic solvent is taken as the oil phase and the surfactant is added for preparing another inverting microemulsion system. The two inverting microemulsion systems are respectively stirred to obtain colorless solution which are mixed and evenly stirred; then the mixed solution is transferred to a water-heating kettle for water-heating. After cooling, appropriate amount of acetone is added for demulsification and high speed centrifugation; then n-heptane andethanol are used in sequence for washing and sedimentation, thus obtaining the rare earth nano material after drying in vacuum. The surface of the rare earth nano material has the double-function ligand and the surfactant, thus leading the double-function ligand and the surfactant to have hydrophilic property and hydrophobic property.

Description

Background technique [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a microemulsion hydrothermal synthesis method of amphiphilic rare earth nanomaterials. Background technique [0002] The application of rare earth nanomaterials involves various fields, and has broad application prospects in the fields of machinery, electronics, optics, magnetism, chemistry and biology. In particular, rare earth luminescent nanomaterials have the advantages of narrow emission, long life, and anti-bleaching, and have great application value in biomarking and imaging. The prerequisites for the biological application of rare earth nanomaterials are: (1) active groups (such as -COOH, -NH 2 Or -SH), to facilitate their reaction with biomolecules; (2) have amphiphilicity, wherein hydrophilicity is conducive to the dispersion of rare earth nanomaterials in water, and hydrophobicity (lipophilicity) is conducive to the entry of rare earth nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
Inventor 李富友陈志钢黄春辉
Owner FUDAN UNIV