A method for preparing nano-silver particles by oxidizing tea dregs
A technology of nano-silver particles and oxidized tea, applied in nanotechnology and other directions, can solve problems such as unevenness, large particle size of nano-silver particles, and inability to solve the problem of silver particle agglomeration, so as to avoid agglomeration, save costs, and avoid damage. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] (1) Soak tea residues in deionized water at 80°C for 4 hours to remove soluble pigments, then dry at 70°C for 3 hours, and finally ball mill and pulverize into tea residue powder with a particle size of 20 μm;
[0030] (2) Take 2g of tea residue powder and dry it at 70°C for 3h, then add it into 100mL aqueous solution containing 0.64g of sodium periodate, and continuously dropwise add glycerol (the mass of glycerol in the sodium periodate aqueous solution) Concentration of 8%), selective oxidation by ultrasonic oscillation at 25°C for 2h (ultrasonic power is 650W). After the reaction is completed, filter, the obtained product is soaked in 1% ethanol aqueous solution for 40min, then washed with deionized water to remove oxidant, and the precipitate is freeze-dried for 24h to obtain oxidized tea residue with dialdehyde groups.
[0031] (3) get 0.02g of above-mentioned preparation gained oxidized tea residue, add it into 100mL deionized water and stir evenly, and mark it a...
Embodiment 2
[0033] (1) Soak tea residues in deionized water at 80°C for 4 hours to remove soluble pigments, then dry at 70°C for 3 hours, and finally ball mill and pulverize into tea residue powder with a particle size of 15 μm;
[0034] (2) Take 2g of tea residue powder and dry it at 70°C for 3h, then add it into 100mL aqueous solution containing 0.64g of sodium periodate, and continuously dropwise add glycerol (the mass of glycerol in the sodium periodate aqueous solution) The concentration is 12%), and it was selectively oxidized by ultrasonic oscillation at 25°C for 3h (ultrasonic power was 760W). After the reaction is completed, filter, and soak the obtained product in 1% ethanol aqueous solution for 40min, then wash with deionized water to remove oxidant, freeze-dry the precipitate for 24h to obtain oxidized tea residue with dialdehyde groups.
[0035] (3) get 0.02g of above-mentioned preparation gained oxidized tea residue, add it to 100mL deionized water and stir evenly, and mark it...
Embodiment 3
[0037] (1) Soak tea residues in deionized water at 80°C for 4 hours to remove soluble pigments, then dry at 70°C for 3 hours, and finally ball mill and pulverize into tea residue powder with a particle size of 20 μm;
[0038] (2) Take 2g of tea residue powder and dry it at 70°C for 3h, then add it into 100mL aqueous solution containing 0.64g of sodium periodate, and continuously dropwise add glycerol (the mass of glycerol in the sodium periodate aqueous solution) Concentration of 10%), selective oxidation by ultrasonic oscillation at 25°C for 2h (ultrasonic power is 720W). After the reaction is completed, filter, the obtained product is soaked in 1.2% ethanol aqueous solution for 40min, then washed with deionized water to remove oxidant, and the precipitate is freeze-dried for 24h to obtain oxidized tea residue with dialdehyde groups.
[0039] (3) get 0.02g of above-mentioned preparation gained oxidized tea residue, add it into 100mL deionized water and stir evenly, and mark i...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More