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Biological synthesizing method of nano-selenium

A biosynthesis, nano-selenium technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of chemical reagents polluting the environment, complex operation, harsh conditions, etc., to achieve simple and convenient operation, The effect of easy availability of raw materials and mild reaction conditions

Active Publication Date: 2018-01-30
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The existing biological method for preparing nano-selenium uses chemical reagents and needs to add templates, catalysts, etc. The operation is complicated and the conditions required are harsh. Chemical reagents will bring pollution and environmental hazards

Method used

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preparation example Construction

[0032] The invention provides a biosynthesis method of nano selenium, which mainly comprises the following steps:

[0033] Step 1, take 4-10 mL of filtered lemon juice, add 1-2 mL of selenous acid with a concentration of 0.1-0.2 mol / L to the lemon juice, and magnetically stir to obtain product A;

[0034] Step 2, adding ammonia water with a molar mass concentration of 0.1-0.5mol / L to the product A, and adjusting the pH of the product A to 8, then ultrasonically vibrating for 30-60min, and then heating in a water bath at 20-60°C, while carrying out Magnetic stirring for 5-6h to obtain red liquid B;

[0035] Step 3: Centrifuge the red liquid B at a speed of 10000-15000 r / min to obtain a precipitate, which is a nano-selenium material, and use a glacial acetic acid solution with a pH of 2-3 to centrifugally clean the nano-selenium material precipitate 3-5 times to obtain red precipitate C;

[0036] In step 4, after the red precipitate C is freeze-dried for 48-72 hours, a red nan...

Embodiment 1

[0041] Step 1, take 4 mL of filtered lemon juice, add 1 mL of selenous acid with a molar mass concentration of 0.2 mol / L to the lemon juice, and magnetically stir to obtain product A;

[0042] Step 2, add the molar mass concentration of 0.1mol / L ammonia water to the product A, and adjust the pH of the product A to 8-9, then ultrasonically shake for 30min, then place it in a water bath, and heat it in a water bath at 20°C , while magnetic stirring was performed for 6h to obtain red liquid B;

[0043] Step 3, centrifuge the red liquid B at a speed of 10000r / min to obtain a precipitate, which is a nano-selenium material, and use a glacial acetic acid solution with a pH of 2 to perform centrifugal cleaning on the nano-selenium material precipitate for 3 times, Obtain red precipitate C;

[0044] Step 4, after the red precipitate C is freeze-dried for 48 hours, a red nano-selenium powder material is obtained.

Embodiment 2

[0046] Step 1, take 10 mL of filtered lemon juice, add 2 mL of selenous acid with a molar mass concentration of 0.1 mol / L to the lemon juice, and magnetically stir to obtain product A;

[0047] Step 2, adding the molar mass concentration of 0.5mol / L ammonia water to the product A, and adjusting the pH of the product A to 9, then ultrasonically shaken for 60min, then placed in a water bath, and heated in a water bath at 60°C, while Carry out magnetic stirring for 5h to obtain red liquid B;

[0048] Step 3, centrifuge the red liquid B at a speed of 15000 r / min to obtain a precipitate, which is a nano-selenium material, and use a glacial acetic acid solution with a pH of 2 to perform centrifugal cleaning on the nano-selenium material precipitate 6 times, Obtain red precipitate C;

[0049] In step 4, after the red precipitate C is freeze-dried for 72 hours, a red nano-selenium powder material is obtained.

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Abstract

The invention discloses a biological synthesizing method of nano-selenium. The biological synthesizing method comprises the following steps of using pure lemon juice; adding seleninic acid, magnetically stirring, adjusting the pH (potential of hydrogen) value by ammonia water, and vibrating by ultrasonic waves; heating in a water bath, and magnetically stirring; finally, centrifuging, so as to obtain the nano-selenium material. The biological synthesizing method has the advantages that by using the seleninic acid and the fresh lemon juice as the raw materials, the raw materials are pure plant,and the nano-selenium can be prepared at room temperature; the green and environment-friendly effects are realized, the reaction is moderate, and the template and catalyst are not needed.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a biosynthesis method of nanometer selenium. Background technique [0002] Nanoscience is one of the hot topics in the field of scientific research. Nanomaterials have special properties in light, electricity, and magnetism. For example, it has properties such as surface effect, small size effect, quantum size effect, and macroscopic tunnel effect. Nanomaterials have broad application prospects in medicine, filtration, catalysis, rubber, magnetic media, chips, etc. [0003] Selenium is one of the essential trace elements for humans and animals, and is closely related to the body's antioxidant capacity, immune function, antiviral, and anticancer effects. Nano-selenium is zero-valent selenium, which belongs to the category of inorganic selenium, and its own nano-size endows nano-selenium with unique physical and chemical properties. Compared with organic seleni...

Claims

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Application Information

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IPC IPC(8): C01B19/02B82Y30/00
Inventor 杨辉苏文荆雄黄莎莎董腾达闫晓哲彭任芳蒲鹏飞
Owner SHAANXI UNIV OF SCI & TECH
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