A kind of preparation method and application of water-soluble green fluorescent silicon quantum dots
A green fluorescence, silicon quantum dot technology, applied in the fields of nanomaterials science and molecular biology, can solve the problem of not finding silicon quantum dots such as ascorbic acid detection, and achieve the effects of easy determination, good selectivity and simple synthesis method
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0053] Using 3-aminopropyltriethoxysilane as a silicon source and absolute ethanol as a solvent to synthesize water-soluble quantum dots, the specific steps are as follows:
[0054] 1) Take 16mL of absolute ethanol in a 50mL round bottom flask, add 4mL of 3-aminopropyltriethoxysilane as a silicon source, add 10mL of different 10mL (0.1mol / L) sodium ascorbate solutions while stirring, at room temperature Stirring for 20 minutes at lower temperature, the crude product of silicon quantum dots was obtained.
[0055] 2) Place a dialysis bag with a molecular weight cut off of 1000 in NaHCO 3 In a mixed solution with a concentration of 2% w / v (g / mL) and a concentration of ethylenediaminetetraacetic acid of 1 mmol / L, after boiling for 10 min, take out the dialysis bag and wash it with deionized water.
[0056] 3) Transfer the obtained silicon quantum dot crude product into the dialysis bag treated in step 2), obtain a colorless transparent solution after dialysis for 48 hours, freeze...
Embodiment 2
[0058] The method for synthesizing water-soluble quantum dots with 3-aminopropyltrimethoxysilane as the silicon source dehydrated alcohol as the solvent, the specific steps are as follows:
[0059] 1) Take 16mL of absolute ethanol in a 50mL round bottom flask, add 4mL of 3-aminopropyltrimethoxysilane as silicon source, add 10mL of different 10mL (0.1mol / L) sodium ascorbate solutions while stirring, at room temperature Stir for 20 minutes to obtain a crude product of silicon quantum dots.
[0060] 2) Place a dialysis bag with a molecular weight cut-off of 1000 in a mixed solution with a NaHCO3 concentration of 2% w / v (g / mL) and an EDTA concentration of 1 mmol / L, boil for 10 minutes, take out the dialysis bag and use it for deionization Wash with water.
[0061] 3) Transfer the obtained silicon quantum dot crude product into the dialysis bag treated in step 2), obtain a colorless transparent solution after dialysis for 48 hours, freeze the obtained liquid after dialysis and obt...
Embodiment 3
[0063] The method for synthesizing water-soluble quantum dots with 3-aminopropyltriethoxysilane as a silicon source and deionized water as a solvent, the specific steps are as follows:
[0064] 1) Take 16mL of absolute ethanol in a 50mL round bottom flask, add 4mL of 3-aminopropyltriethoxysilane as a silicon source, add 10mL of different 10mL (0.1mol / L) sodium ascorbate solutions while stirring, at room temperature Stirring for 20 minutes at lower temperature, the crude product of silicon quantum dots was obtained.
[0065] 2) Place a dialysis bag with a molecular weight cut-off of 1000 in a mixed solution with a NaHCO3 concentration of 2% w / v (g / mL) and an EDTA concentration of 1 mmol / L, boil for 10 minutes, take out the dialysis bag and use it for deionization Wash with water.
[0066] 3) Transfer the obtained silicon quantum dot crude product into the dialysis bag treated in step 2), obtain a colorless transparent solution after dialysis for 48 hours, freeze the obtained l...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More