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Preparation method for nano-selenium

A technology of nano-selenium and selenite, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of inability to produce nano-selenium particles, and achieve uniform particle size and application. promising effect

Active Publication Date: 2015-01-28
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the existing problem of not being able to produce different particle sizes and uniform particle size (size span<5%) nano-selenium particles

Method used

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  • Preparation method for nano-selenium
  • Preparation method for nano-selenium
  • Preparation method for nano-selenium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Prepare 20mM sodium selenite solution, 80mM sodium lauryl sulfate stabilizer solution, 80mM hydrochloric acid solution and 300mM sodium thiosulfate pentahydrate reducing agent solution respectively.

[0032] 2) Add selenite solution, acid solution, stabilizer solution, water and reducing agent solution successively in reaction system under normal temperature and pressure, make selenite solution, acid solution, stabilizer solution and reducing agent solution press The mass ratio of solute is 1:2:2:2. The mixture was fully mixed evenly, and left to react at room temperature for 8 hours to obtain a red nano-selenium suspension. Centrifuge the nano-selenium suspension at 10,000 rpm for 20 minutes, remove the supernatant, and obtain the finished colloidal nano-selenium. The nano-selenium suspension is observed under a transmission electron microscope, and the average particle size of the nano-selenium is measured and calculated, and the particle size is about 240nm.

[...

Embodiment 2

[0039] Compared with embodiment 1, the difference is only in:

[0040] The selenite is potassium selenite, the concentration is 18mM; the reducing agent is sodium thiosulfate pentahydrate, the concentration is 280mM; the stabilizer is sodium lauryl sulfate, the concentration is 70mM; the acid solution is hydrochloric acid, the concentration is 70mM ;

[0041] The selenite solution, acid solution, stabilizer solution and reducing agent solution are mixed thoroughly and evenly according to the solute mass ratio of 1:2:2:3, and left to stand for 8 hours at room temperature to obtain a red color with an average particle size of about 190nm. nanoselenium suspension. The above nano-selenium suspension was centrifuged at 10000 rpm for 20 minutes, and the supernatant was removed to obtain the finished colloidal nano-selenium.

[0042] The photo of the nano-selenium suspension that this embodiment obtains is attached figure 1 test tube 2. The transmission electron microscope (TEM) ...

Embodiment 3

[0045] Compared with embodiment 1, the difference is only in:

[0046] The selenite is zinc selenite, the concentration is 25mM; the reducing agent is sodium thiosulfate pentahydrate, the concentration is 350mM; the stabilizer is sodium lauryl sulfate, the concentration is 90mM; the acid solution is hydrochloric acid, the concentration is 90mM ;

[0047] The selenite solution, acid solution, stabilizer solution and reducing agent solution are mixed thoroughly and uniformly according to the solute mass ratio of 1:2:2:4, and left to stand for reaction at room temperature for 6 hours, and the average particle diameter of about 140nm can be obtained respectively. Red nanoselenium suspension. The above nano-selenium suspension was centrifuged at 11000 rpm for 30 minutes, and the supernatant was removed to obtain the finished colloidal nano-selenium.

[0048] The photo of the nano-selenium suspension that this embodiment obtains is attached figure 1 Test tube 3. The transmission...

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Abstract

The invention relates to a preparation method for nano-selenium. The preparation method comprises the steps of (1) carrying out reduction reaction on a selenite solution and a reducing agent solution when acid liquor and a stabilizer are available so as to obtain a nano-selenium suspension, wherein the mass ratio of the selenite solution to the reducing agent solution is 1:(2-30); and (2) centrifuging the nano-selenium suspension, removing the supernate so as to obtain the finished product-colloid nano-selenium, adding deionized water to re-suspend, freeze drying so as to obtain the finished product solid nano-selenium. The finished product nano-selenium can be preserved at 2-6DEG C. According to the measurement of the recovery rate of the nano-selenium of all diameters, the generation proportion of the nano-selenium is gradually increased along with the decrease of the diameter of the nano-selenium. The preparation method is simple to operate, is safe and stable, is short in time, can prepare uniform nano-selenium of different diameters, and provides good material base for expanding the application field of the nano-selenium and improving the application value of the nano-selenium.

Description

technical field [0001] The invention relates to a method for preparing nano-selenium with different particle sizes, in particular to a method for preparing nano-selenium with different particle sizes and uniform particle size. Background technique [0002] Selenium (Se) is an essential trace element for animals and humans. Among them, amorphous nano-selenium has good biological activity, and has the effects of enhancing immunity, inhibiting tumors, anti-aging and anti-oxidation on living bodies; while crystalline nano-selenium has the characteristics of low melting point, high optical conductivity and high chemical properties, so Selenium is widely used in the fields of semiconductor optoelectronics, medical biology and ceramic industry, and nano-selenium is also used as food additives and fluorescent dyes. In addition, when nano-selenium is combined with NH, C=O, COO and C-N bonds of protein, it shows good biological activity and adsorption capacity, and has good applicati...

Claims

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Application Information

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IPC IPC(8): C01B19/02B82Y30/00
CPCC01B19/02C01P2002/85C01P2004/04C01P2004/62C01P2004/64
Inventor 郭岩彬李吉祥吴文良赵桂慎
Owner CHINA AGRI UNIV
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