A kind of preparation method of nitrogen-doped graphene quantum dot material
A technology of graphene quantum dots and nitrogen doping, which is applied in the field of nanomaterials, can solve the problems of graphene quantum dot doping difficulties, unstable luminescence, etc., and achieve mass production, improve charge transport capabilities, and reduce costs.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0033] Take 0.1g of network-shaped reduced graphene oxide, disperse it in 100ml of concentrated nitric acid with a mass percentage of 65%, stir it magnetically, heat the oil bath to 150°C while circulating water condenses, and react at a constant temperature for 12h; then remove the condensed water and continue to evaporate at a constant temperature for 2h; Cool to room temperature, then add ultrapure water for ultrasonic dispersion for 15 minutes; filter, and concentrate the filtrate to 10 mL by rotary evaporation, put it into a 3000Da dialysis bag for dialysis for 2 days; the obtained dialysate is again concentrated by rotary evaporation to obtain a high concentration of nitrogen-doped graphene quantum points; finally, vacuum freeze-drying at -50~-60°C for 10 h to obtain brown nitrogen-doped graphene quantum dots with a yield of 70%.
[0034] The particle size of the brown nitrogen-doped graphene quantum dots is about 8nm; the fluorescence emission color of the quantum dots i...
Embodiment 2
[0036] Take 0.1g of network-shaped reduced graphene oxide, disperse it in 100ml of concentrated nitric acid with a mass percentage of 65%, heat it in an oil bath under magnetic stirring to 150°C while circulating water condenses, and react at a constant temperature for 24 hours; then remove the condensed water and continue to evaporate at a constant temperature for 2 hours; Cool to room temperature, add ultrapure water to it for ultrasonic dispersion for 15min; filter, and concentrate the filtrate to 15mL by rotary evaporation; then put it into a 3000Da dialysis bag and dialyze for 1 day; the dialysate is again concentrated by rotary evaporation to obtain high-concentration nitrogen-doped graphene Quantum dots; finally, vacuum freeze-drying at -50~-60°C for 10 hours to obtain yellow nitrogen-doped graphene quantum dots. The yield was 54%.
[0037] The particle size of the yellow nitrogen-doped graphene quantum dots is about 5nm; the fluorescence emission color of the quantum d...
Embodiment 3
[0039] Take 0.1g of network reduced graphene oxide, disperse it in 100ml of concentrated nitric acid with a mass percentage of 65%, heat it in an oil bath under magnetic stirring to 150°C while circulating water condenses, and react at a constant temperature for 48h; then remove the condensed water and continue to evaporate at a constant temperature for 1.5h Cool to room temperature, add ultrapure water and ultrasonically disperse for 10min; filter, the filtrate is concentrated to 15mL by rotary evaporation, and put into a 3000Da dialysis bag for dialysis for 2 days; the dialysate is again concentrated by rotary evaporation to obtain high-concentration nitrogen-doped graphene quantum dots ; Finally, vacuum freeze-drying at -50~-60°C for 10 hours to obtain light yellow nitrogen-doped graphene quantum dots. The yield was 35%.
[0040] The particle size of the light yellow nitrogen-doped graphene quantum dots is about 4nm; the fluorescence emission color of the quantum dots under t...
PUM
Property | Measurement | Unit |
---|---|---|
boiling point | aaaaa | aaaaa |
size | aaaaa | aaaaa |
size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com