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
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[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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