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Attapulgite clay quantum dot nano-composite fluorescent material and preparation method thereof

A nano-composite and fluorescent material technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of instability of thioglycolic acid and liposomes, decrease of fluorescence intensity, hindering biological application research, etc., and achieve low-cost effects

Inactive Publication Date: 2010-08-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the instability of thioglycolic acid and liposomes in these methods, the above-mentioned quantum dots are easily degraded; the surface of the quantum dots is coated with SiO 2 Although the water solubility and stability of the core-shell structure are improved, the fluorescence intensity is significantly reduced, which hinders its further biological application research [Science, 281(5385), 2013(1998)]

Method used

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  • Attapulgite clay quantum dot nano-composite fluorescent material and preparation method thereof
  • Attapulgite clay quantum dot nano-composite fluorescent material and preparation method thereof
  • Attapulgite clay quantum dot nano-composite fluorescent material and preparation method thereof

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preparation example Construction

[0017] The preparation method of the attapulgite quantum dot nanocomposite fluorescent material of the present invention comprises the following steps:

[0018] a. Add nano attapulgite to the aqueous solution of metal ion salt, stir magnetically for 1-60h at 20-80°C, centrifuge the solid, wash with deionized water, and dry to obtain attapulgite / metal ions,

[0019] b. Take attapulgite / metal ion, react it with an anion source at 20-80° C. for 1-60h, centrifuge the solid, wash, and dry to obtain attapulgite quantum dot nanocomposite fluorescent material.

[0020] The metal ion salt described in step a is zinc acetate, zinc chloride or cadmium chloride.

[0021] The anion source described in step b is sodium hydroxide, sodium sulfide, hydrogen sulfide or thiourea.

Embodiment 1

[0022] Embodiment 1: add 0.15g nano attapulgite in the reaction vessel, 30ml concentration is 0.1M Zn(CH 3 COO) 2 The solution was magnetically stirred at 30°C for 8h, the solid was centrifuged, washed with deionized water, and dried to obtain attapulgite / Zn 2+ . Take an appropriate amount of attapulgite / Zn 2+ , add 40 ml of 0.25 M NaOH solution in ethanol, and stir magnetically at 65 °C for 12 h. The solid was centrifuged, washed with ethanol, and dried to obtain attapulgite / ZnO composite nanomaterials.

Embodiment 2

[0023] Example 2: Add 0.13g of nano attapulgite to the reaction vessel, and 30ml of CdCl with a concentration of 0.1M 2 The solution was magnetically stirred at room temperature for 24h, the solid was centrifuged, washed with deionized water, and dried to obtain attapulgite / Cd 2+ . To an appropriate amount of attapulgite / Cd 2+ Add 40ml of 0.25M Na 2 The ethanolic solution of S was magnetically stirred at room temperature for 24 h. After the reaction, the solid was centrifugally washed until the pH was neutral, and after drying, the attapulgite / CdS composite nanomaterial was obtained.

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Abstract

The invention relates to an attapulgite clay quantum dot nano-composite fluorescent material and a preparation method thereof, the material comprises inorganic quantum dots and uniformly dispersed nano-attapulgite clay, the quantum dots are positioned in pore paths of the nano-attapulgite clay, and the inorganic quantum dots are zinc oxide, zinc sulfide or cadmium sulfide. The method comprises the following steps: a) adding the nano-attapulgite clay into water solution of metal ion salt, carrying out magnetic stirring for 1-60h at the temperature of 20-80 DEG C, carrying out centrifugation on solids, cleaning with deionized water, drying and obtaining attapulgite clay / metal ions; and b) taking the attapulgite clay / metal ions, carrying out reaction on the attapulgite clay / metal ions and a negative ion source for 1-60h at the temperature of 20-80 DEG C, carrying out the centrifugation on the solids, washing, drying and obtaining the attapulgite clay quantum dot nano-composite fluorescent material. The prepared attapulgite clay quantum dot composite material is the one-dimensional nano-material with uniform size and integration of the fluorescence property of the quantum dots and the water solubility of the attapulgite clay, fluorescence is derived from the intrinsic luminescence of the quantum dots in the pore paths, and the size of the quantum dots is controllable.

Description

technical field [0001] The invention relates to an attapulgite / quantum dot nanocomposite fluorescent material, in particular to a preparation method of the composite material. Background technique [0002] Quantum dots (quantum, QDs), also known as semiconductor nanocrystals, have excellent fluorescence properties, especially water-soluble quantum dots, showing extremely broad application prospects in biochemistry, molecular biology, cell biology and medical research. . However, the preparation methods of quantum dots are mainly based on organic phase synthesis, and the products obtained are fat-soluble, which greatly hinders the application of quantum dots in the field of biological research. Coating the surface of lipid-soluble quantum dots with a layer of thioglycolic acid can improve their water solubility [Science281(5385), 2016(1998)]; the water-soluble quantum dots coated with thioglycolic acid on the surface are directly obtained by the method of water-phase synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56C09K11/54
Inventor 王明亮王芳董宝利陈立红
Owner SOUTHEAST UNIV
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