A kind of silicon quantum dot aqueous solution and its preparation method and application
A technology of silicon quantum dots and aqueous solutions, applied in chemical instruments and methods, silicon compounds, measuring devices, etc., can solve the problems of poor water solubility of silicon quantum dots and limitations in application fields
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0043] Take 2.3g corn stalks and put them into a tube furnace for high temperature pyrolysis. The pyrolysis temperature is 600°C and the pyrolysis time is 60min. After the pyrolysis, the moisture in the straw was removed, and the obtained pyrolysis residue of 0.7 g was soaked in 100 ml of 10 wt % sodium carbonate solution, and then filtered. Dry at room temperature, then pyrolyze in a tube furnace, keep the vacuum at 0.08Mpa, keep at 110°C for 60min, then raise the temperature to 500°C at a rate of 10°C / min, and keep for 120min. Next, dissolve 0.7g of pyrolysis slag in 70mL of distilled water at a stirring rate of 200r / min at 80°C, stir and dissolve for 120 min, wash and filter to obtain a water glass solution.
[0044] Take 1g of water glass solution and 0.5g of 1-allyl-3-methylimidazolium chloride salt into the reaction flask, use a stirring bar to stir at a speed of 800r / min, and heat to 180°C under the condition of continuous nitrogen flow , keep warm for 2h to get 2mL br...
Embodiment 2
[0050] Water glass preparation process is with embodiment 1.
[0051]Take 1g of water glass and 1g of 1-allyl-3-methylimidazolium chloride salt into the reaction flask, use a stirrer to stir at a speed of 800r / min, and heat to 180°C under the condition of continuous nitrogen flow, keep the temperature 2h, get 3mL brown liquid, and use a 3500Da dialysis bag, add 50mL distilled water for 24h dialysis, obtain the outer layer solution as a silicon quantum dot aqueous solution sample, and conduct transmission electron microscopy and fluorescence intensity analysis to obtain the fluorescence quantum yield of the sample was 18.29%.
[0052] figure 1 It is a transmission electron microscope image of silicon quantum dots, which shows that silicon quantum dots are uniformly distributed spherical particles with good monodispersity and a particle size of about 5nm. Moreover, the silicon quantum dots all have a uniform lattice plane, which shows that the silicon quantum dots are arranged...
Embodiment 3
[0059] Water glass preparation process is with embodiment 1.
[0060] Get 1g of water glass and 1.5g of 1-allyl-3-methylimidazolium chloride salt and put it into a reaction flask, use a stirring bar to carry out stirring at a speed of 800r / min, and heat to 180°C under the condition of continuous flow of nitrogen, Incubate for 2 hours to obtain 3.6 mL of brown liquid, and use a 3500 Da dialysis bag, add 50 mL of distilled water for 24 hours of dialysis, obtain the outer layer solution as a sample of silicon quantum dot aqueous solution, and conduct transmission electron microscopy and fluorescence intensity analysis to obtain the sample fluorescence quantum dots The yield is 12.74%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More