Preparation method of beta-NaYF4:Yb/Tm@Cds core-shell nanostructure

A core-shell and nanoparticle technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of cumbersome preparation methods, harsh conditions, and complex processes, and achieve simple operation, The effect of mild reaction, simple operation and easy control

Inactive Publication Date: 2016-10-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a kind of β-NaYF 4 : The preparation method of Yb / Tm@CdS core-shell nanoparticles aims to solve the problems of cumbersome operation, harsh conditions and complicated process of the existing preparation methods

Method used

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  • Preparation method of beta-NaYF4:Yb/Tm@Cds core-shell nanostructure
  • Preparation method of beta-NaYF4:Yb/Tm@Cds core-shell nanostructure
  • Preparation method of beta-NaYF4:Yb/Tm@Cds core-shell nanostructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment prepares β-NaYF according to the following steps 4 :Yb / Tm@CdS core-shell nanoparticles:

[0026] a. Weigh 0.1357g YCl 3 , 0.0838g YbCl 3 and 0.0014g TmCl 3 Put it into the reactor, add 5mL oleic acid and 15mL octadecene, stir evenly, heat to 150°C and keep it warm at this temperature for 0.5h to obtain a clear clear liquid; cool the clear clear liquid to room temperature, add 4mL solvent dropwise There are 0.3652g NH 4 F and 0.2464g NaOH methanol solution, stirred at room temperature for 0.5h, then heated to 150°C and kept for 0.5h to remove methanol, and finally heated to 240°C under nitrogen protection flow, kept for 2h to obtain NaYF 4 : Yb / Tm nanoparticles.

[0027] b. Weigh 5.0 mg of NaYF prepared above 4 : Put Yb / Tm nanoparticles in a flask, add 2mL cyclohexane for ultrasonic dispersion, then add 20mL water and 0.5mg cetyltrimethylammonium bromide, stir at room temperature for 6h, and centrifuge to obtain water-soluble β-NaYF 4 : Yb / Tm nanop...

Embodiment 2

[0033] This embodiment prepares β-NaYF according to the following steps 4 :Yb / Tm@CdS core-shell nanoparticles:

[0034] a, prepare NaYF by the same method as in Example 1 4 : Yb / Tm nanoparticles.

[0035] b. Weigh 200mg of NaYF prepared above 4 : Yb / Tm nanoparticles in a flask, add 2mL cyclohexane ultrasonic dispersion, then add 20mL water and 50mg cetyltrimethylammonium bromide, stir at room temperature for 24h, centrifuge to get water-soluble β-NaYF 4 : Yb / Tm nanoparticles.

[0036] c. Weigh 90 mg of water-soluble β-NaYF 4 : Yb / Tm nanoparticles and 109mg cetyltrimethylammonium bromide, add 15mL water ultrasonic dispersion, then add 150mg ascorbic acid, 250mg Cd(NO 3 ) 2 and 200mg of hexamethylenetetramine, stirred and dissolved, and reacted at 95°C for 6 hours; naturally cooled to room temperature, and centrifuged to obtain β-NaYF 4 :Yb / Tm@CdO core-shell nanoparticles.

[0037] d. The resulting β-NaYF 4 : Yb / Tm@CdO nanoparticles were placed in a tube furnace, and H ...

Embodiment 3

[0040] This embodiment prepares β-NaYF according to the following steps 4 :Yb / Tm@CdS core-shell nanoparticles:

[0041] a, prepare NaYF by the same method as in Example 1 4 : Yb / Tm nanoparticles.

[0042] b. Weigh 100mg of NaYF prepared above 4 : Yb / Tm nanoparticles in a flask, add 2mL cyclohexane ultrasonic dispersion, then add 20mL water and 10mg cetyltrimethylammonium bromide, stir at room temperature for 15h, centrifuge to get water-soluble β-NaYF 4 : Yb / Tm nanoparticles.

[0043] c. Weigh 26 mg of water-soluble β-NaYF 4 : Yb / Tm nanoparticles and 30mg cetyltrimethylammonium bromide, add 15mL water ultrasonic dispersion, then add 27mg ascorbic acid, 30mg Cd(CH 3 COO) 2 and 5.0mg of hexamethylenetetramine, stirred and dissolved, reacted at 85°C for 10 hours; naturally cooled to room temperature, centrifuged and dried to obtain β-NaYF 4 :Yb / Tm@CdO core-shell nanoparticles.

[0044] d. The resulting β-NaYF 4 : Yb / Tm@CdO nanoparticles were placed in a tube furnace, and...

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Abstract

The invention discloses a preparation method of a beta-NaYF4:Yb/Tm@Cds core-shell nanostructure. The preparation method is characterized by including: dispersing water-soluble beta-NaYF4:Yb/Tm nano particles in cadmium salt aqueous solution containing hexamethylene tetramine, cetyltrimethyl ammonium bromide and ascorbic acid, and performing reaction for 6-24 hours at 80-95 DEG C to obtain beta-NaYF4:Yb/Tm@CdO core-shell nano particles; allowing the beta-NaYF4:Yb/Tm@CdO core-shell nano particles and H2S gas to react under 40-150 DEG C for 2-6 hours to obtain beta-NaYF4:Yb/Tm@Cds core-shell nano particles. The preparation method is simple to operate, simple in process requirement and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing a composite nanostructure of upconversion fluorescent nanoparticle and semiconductor CdS. Background technique [0002] Lanthanide ion-doped upconverting fluorescent nanoparticles (UCNPs) have attracted extensive attention because they can convert near-infrared light into more energetic ultraviolet or visible light. Moreover, up-conversion fluorescent nanoparticles and semiconductors can construct a fluorescence resonance transfer system, which can fully transfer the near-infrared photon energy absorbed by this up-conversion nanomaterial, and then make full use of the infrared energy in solar energy to improve the use efficiency of solar energy. Important economic value and social benefits. [0003] The near-infrared photon energy absorbed by upconversion fluorescent nanostructures can be effectively transferred and excited ZnO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85B01J27/04B01J35/02
CPCB01J27/04B01J35/004B01J35/023C09K11/7773
Inventor 钱海生章富王婉妮李耀武
Owner HEFEI UNIV OF TECH
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