Preparation method of fluorescent carbon dots modified by organosilane
A technology of fluorescent carbon dots and organosilanes, applied in chemical instruments and methods, luminescent materials, nano optics, etc., can solve the problems of low yield of carbon dots, cumbersome process, high cost, etc., and achieve difficult quenching and good fluorescence intensity , the effect of low production cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0021] Weigh 1 g of soybean milk powder, add 10 mL of deionized water and 10 mL of silane coupling agent, and mix ultrasonically, then put the mixture into a 100 mL polytetrafluoroethylene autoclave, and react at 150 °C for 2 h. The reactor was cooled at room temperature, filtered with filter paper, centrifuged at 10,000 rpm for 10 min, and the supernatant was taken to obtain a fully dispersed carbon dot dispersion, which was golden yellow.
[0022] as attached image 3 As shown, the emission peak of the carbon dot dispersion is roughly around 550 nm under different excitation wavelengths from 340 nm to 540 nm. As the excitation wavelength increases, the emission peak appears a slight red shift, which indicates that the fluorescence emission of the carbon dots is dependent on the excitation wavelength; the carbon dots emit bright turquoise fluorescence under ultraviolet light, and the fluorescence intensity decreases with the increase of the excitation wavelength. It showed a...
Embodiment 2
[0024] Weighed 1 g of soybean milk powder, added 10 mL of deionized water and 10 mL of silane coupling agent, and ultrasonically mixed the mixture into a 100 mL polytetrafluoroethylene autoclave for 2 h at 160 °C. The reactor was cooled at room temperature, filtered with filter paper, centrifuged at 10,000 rpm for 10 min, and the supernatant was taken to obtain a fully dispersed carbon dot dispersion, which was brownish yellow.
[0025] as attached Figure 4 As shown, the carbon dot dispersion has obvious emission peaks in the 550 nm to 560 nm band under different excitation wavelengths from 420 nm to 580 nm. With the increase of the excitation wavelength, the emission peak has a significant red shift, which indicates that the fluorescence emission of the carbon dots is dependent on the excitation wavelength; the carbon dots emit bright turquoise fluorescence under ultraviolet light.
Embodiment 3
[0027] Weighed 1 g of soybean milk powder, added 10 mL of deionized water and 10 mL of silane coupling agent, and ultrasonically mixed the mixture into a 100 mL polytetrafluoroethylene autoclave for 2 h at 170 °C. The reactor was cooled at room temperature, filtered with filter paper, centrifuged at 10,000 rpm for 10 min, and the supernatant was taken to obtain a fully dispersed carbon dot dispersion, which was brownish yellow.
[0028] as attached Figure 5 As shown, the emission peak of the carbon dot dispersion is around 550 nm under different excitation wavelengths from 420 nm to 540 nm. With the increase of the excitation wavelength, the emission peak has a red shift, which indicates that the fluorescence emission of the carbon dots is dependent on the excitation wavelength; the carbon dots emit bright turquoise fluorescence under ultraviolet light.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More