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Method for synthesizing upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis

A technology of sodium polyacrylate and nanospheres, applied in nanotechnology, chemical instruments and methods, luminescent materials, etc., can solve the problems of insufficient mildness of reagents, complicated synthesis steps, high reaction temperature, etc., and achieve mild conditions, simple methods, and conditions simple effect

Inactive Publication Date: 2013-07-24
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, these methods for preparing up-conversion fluorescent hollow spheres have complicated synthesis steps, require high reaction temperature and long reaction time
The reagents required for the reaction are not mild enough and green, mostly volatile organic reagents and highly corrosive HF or NaOH solutions. Based on the above shortcomings of existing methods, it is urgent to develop a simple, green, economical and effective, large-scale , a general method with mild reaction conditions

Method used

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  • Method for synthesizing upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis
  • Method for synthesizing upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis
  • Method for synthesizing upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis

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Embodiment 1

[0036] Synthesis of Red Upconversion Fluorescent Mesoporous Gd Based on Sodium Polyacrylate Microsphere Template 2 o 3 :Yb 3+ / Er 3+ and Gd 2 o 3 :Yb 3+ / Ho 3+ Preparation of hollow nanospheres:

[0037] (1) Synthesis of sodium polyacrylate (PAAS) microspheres: at room temperature, take 0.5 mL of 0.2 g mL -1 Add 10 mL of deionized water to the PAAS aqueous solution and stir evenly, then add 40 mL of isopropanol (IPA) dropwise to the mixed solution, and keep stirring for 20 min to obtain a well-dispersed PAAS microsphere solution for later use ( The volume ratio of water and isopropanol is 1:4);

[0038] (2) Take 4 mL of the above PAAS microsphere solution and add 320 μL of 0.1 M GdCl 3 : YbCl 3 : ErCl 3 (Gd 3+ :Yb 3+ / Er 3+ =80:18:2) or GdCl 3 : YbCl 3 : HoCl 3 (Gd 3+ :Yb 3+ / Ho 3+ =79.6:20:0.4) deionized water-IPA mixed solution was ultrasonicated for 20 min. After the reaction was completed, it was washed 5 times with IPA, centrifuged to completely...

Embodiment 2

[0041] Synthesis of green upconversion fluorescent mesoporous Gd based on sodium polyacrylate microsphere template 2 o 3 :Y 3+ / Er 3+ Preparation of hollow nanospheres:

[0042] (1) with embodiment 1;

[0043] (2) Take 4 mL of the above PAAS microsphere solution and add 320 μL of 0.1 M GdCl 3 : YCl 3 : ErCl 3 (Gd 3+ :Y 3+ / Er 3+ =80:18:2) deionized water-IPA mixed solution ultrasonic 20 min, other with embodiment 1;

[0044] (3) with embodiment 1.

Embodiment 3

[0046] Synthesis of Blue Upconversion Fluorescent Mesoporous Gd Based on Sodium Polyacrylate Microsphere Template 2 o 3 :Yb 3+ / Tm 3+ Preparation of hollow nanospheres:

[0047] (1) with embodiment 1;

[0048] (2) Take 4 mL of the above PAAS microsphere solution and add 320 μL of 0.1 M GdCl 3 : YbCl 3 : TmCl 3 (Gd 3+ :Yb 3+ / Tm 3+ =79.8:20:0.2) deionized water-IPA mixed solution ultrasonic 20 min, other with embodiment 1;

[0049] (3) with embodiment 1.

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Abstract

The invention belongs to the field of nanometer composite materials and in particular relates to a preparation method of an upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis. Sodium polyacrylate microsphere is used as a template for synthesizing multicolor upconversion fluorescence gadolinium trioxide mesoporous hollow nanosphere. The method comprises the following steps of: firstly, adding sodium polyacrylate to a water and isopropanol system to prepare a sodium polyacrylate microsphere; then, enabling rear-earth ions to replace sodium ions for being coordinated with carboxyl of the sodium polyacrylate microsphere to form a polymer precursor shell by using the sodium polyacrylate microsphere as the template through the ion exchange effect of the rear-earth ions and the sodium ions, wherein the polymer precursor shell is repeatedly washed by isopropanol for many times; and finally, roasting the washed polymer precursor for 2 hours at 600 DEG C to obtain the lanthanide series-doped upconversion fluorescence hollow gadolinium trioxide spheres. The method for synthesizing the upconversion fluorescence hollow nanosphere based on sodium polyacrylate microsphere template synthesis is simple and quick, gentle in conditions, green and environment-friendly. Moreover, the method can be used for drug delivering, upconversion fluorescence cell imaging and magnetic resonance imaging. Besides, the method also can be used for catalysts, a chemical reactor, a biological imaging probe and a drug delivery system.

Description

[0001] technical field [0002] The invention belongs to the field of nanocomposite materials, and in particular relates to a preparation method for synthesizing up-conversion fluorescent hollow nanospheres with sodium polyacrylate microsphere templates. [0003] Background technique [0004] Up-conversion luminescence refers to the luminescence phenomenon in which rare earth ions absorb two or more low-energy photons and radiate one high-energy photon, usually referring to the conversion of near-infrared light to visible light. So far, up-conversion materials are mainly solid compounds doped with rare earth elements. Using the metastable energy level characteristics of rare earth elements, they can absorb multiple low-energy long-wave radiations, thereby turning infrared light invisible to the human eye into visible light. Compared with traditional fluorescent materials, such as organic fluorescent dye molecules and semiconductor quantum dots, it shows excellent character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78B82Y40/00
Inventor 王婷婷任红张凌宇李鹿
Owner CHANGCHUN UNIV OF SCI & TECH
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