A kind of high fluorescence intensity silicon doped carbon quantum dots and its photochemical synthesis method and application
A technology of photochemical synthesis and carbon quantum dots, which is applied in the field of carbon nanometers, can solve the problems of weakened fluorescence intensity, unstable fluorescence, and low quantum efficiency, and achieve high fluorescence intensity, high fluorescence intensity, and good photostability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] A photochemical synthesis method of silicon-doped carbon quantum dots with high fluorescence intensity, the steps of the photochemical synthesis method are as follows:
[0043] S1: Prepare N-phenyl-p-phenylenediamine and 3-aminopropyltrimethoxysilane (C 6 h 17 NO 3 Si), N-phenyl-p-phenylenediamine is added into distilled water as a carbon source, after ultrasonic treatment to make it uniformly dispersed, 3-aminopropyltrimethoxysilane is added dropwise to the system as a silicon source, and the mixture system fully stir;
[0044] S2: Infuse nitrogen gas into the above system to remove dissolved oxygen, then transfer the system to a photochemical reactor, and perform photochemical reaction under xenon lamp irradiation and continuous stirring;
[0045] S3: After the photochemical reaction is completed, cool naturally to below 30°C, centrifuge the system, collect the supernatant and perform ultrafiltration on it, and collect the filtrate to obtain silicon-doped carbon qu...
Embodiment 2
[0047] A photochemical synthesis method of silicon-doped carbon quantum dots with high fluorescence intensity, the steps of the photochemical synthesis method are as follows:
[0048] S1: Prepare N-phenyl-p-phenylenediamine and 3-aminopropyltrimethoxysilane according to the molar ratio of 3.1:1, add N-phenyl-p-phenylenediamine as a carbon source into distilled water, and disperse it by ultrasonic treatment After uniformity, 3-aminopropyltrimethoxysilane is added dropwise into the system as a silicon source, and the mixture system is fully stirred;
[0049] S2: Infuse nitrogen gas into the above system to remove dissolved oxygen, then transfer the system to a photochemical reactor, and perform a photochemical reaction under 450W ultraviolet xenon lamp irradiation and continuous stirring for 1 to 5 hours;
[0050] S3: After the photochemical reaction, cool naturally to below 30°C, centrifuge the system at 8000rpm for 15min, collect the supernatant and perform ultrafiltration wit...
Embodiment 3
[0052] S1: Add 0.5g of N-phenyl-p-phenylenediamine as a carbon source to 90mL of distilled water, and after ultrasonic treatment for 5min to disperse N-phenyl-p-phenylenediamine evenly, add 10mL of 3-aminopropyl Trimethoxysilane was slowly added dropwise into the system as a silicon source, and the mixture was fully stirred for 5 minutes;
[0053] S2: Introduce nitrogen into the above system to remove dissolved oxygen, then transfer the system to a photochemical reactor, and perform a photochemical reaction under 450W ultraviolet xenon lamp irradiation and continuous stirring. The xenon lamp irradiation provides light and heat, and as the reaction time progresses , the color of the system solution gradually changed to dark brown, which indicated that silicon-doped carbon quantum dots (Si-CQDs) had been formed;
[0054] S3: After 5 hours of irradiation, the photochemical reaction ends, the reaction system is naturally cooled to below 30°C, and the system is centrifuged at 8000r...
PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
| luminous efficiency | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More