Carbon nitride quantum dot/titanium dioxide sol and preparation method thereof
A technology of titanium dioxide and quantum dots, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of high preparation cost, low quantum yield, poor dispersion, etc., and achieve high quantum yield , strong catalytic activity and easy separation
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Embodiment 1
[0026] Embodiment 1: A kind of preparation method of carbon nitride quantum dot / titanium dioxide
[0027] 1. Preparation of Carbon Nitride Quantum Dots (g-CNQDS)
[0028] 5g of melamine was used as a precursor, calcined to 600°C in a muffle furnace, kept for 3 hours, cooled naturally, taken out, and ground to obtain powdered g-C 3 N 4 . Powdered g-C 3 N 4 Mix evenly with the ammoniacal liquor that volume fraction is 26%, described g-C 3 N 4 The mass-volume ratio of the powder to ammonia water is 1:250, and then placed in a polytetrafluoroethylene reactor at 180°C for hydrothermal reaction for 11 hours. After taking it out, the ammonia water is evaporated by rotary evaporation, and the light white g-C3N4 quantum dot liquid is obtained by ultrasonication. The ultrasonic frequency is 25KHz, and the ultrasonic time is 2 hours.
[0029] 2. Preparation of carbon nitride quantum dots / titanium dioxide sol
[0030]At a low temperature of 0°C, add 1ml of titanium tetrachloride t...
Embodiment 2
[0038] Embodiment 2 A kind of preparation method of carbon nitride quantum dot / titanium dioxide
[0039] 1. Carbon nitride quantum dots (g-CNQD S ) preparation
[0040] 5g of melamine was used as a precursor, calcined to 500°C in a muffle furnace, kept for 1 hour, cooled naturally, taken out, and ground to obtain powdered g-C 3 N 4 . Powdered g-C 3 N 4 Mix evenly with ammonia water with a volume fraction of 25%, the g-C 3 N 4 The mass volume ratio of the powder to ammonia water is 1:200, and then placed in a polytetrafluoroethylene reactor at 170°C for hydrothermal reaction for 10 hours. After taking it out, the ammonia water is evaporated by rotary evaporation, and the light white g-C3N4 quantum dot liquid is obtained by ultrasonication. The ultrasonic frequency is 20KHz, and the ultrasonic time is 1 hour.
[0041] 2. Preparation of carbon nitride quantum dots / titanium dioxide sol
[0042] At a low temperature of 0°C, add 1ml of titanium tetrachloride to a mixed solv...
Embodiment 3
[0044] Embodiment 3: A kind of preparation method of carbon nitride quantum dot / titanium dioxide
[0045] 1. Carbon nitride quantum dots (g-CNQD S ) preparation
[0046] 5g of melamine was used as a precursor, calcined to 700°C in a muffle furnace, kept for 1 hour, cooled naturally, taken out, and ground to obtain powdered g-C 3 N 4 . Powdered g-C 3 N 4 Mix evenly with the ammoniacal liquor that volume fraction is 28%, described g-C 3 N 4 The mass-volume ratio of the powder to ammonia water is 1:300, and then placed in a polytetrafluoroethylene reactor at 190°C for hydrothermal reaction for 12 hours. After taking it out, the ammonia water is evaporated by rotary evaporation, and the light white g-C3N4 quantum dot liquid is obtained by ultrasonication. The ultrasonic frequency is 30KHz, and the ultrasonic time is 3 hours.
[0047] 2. Preparation of carbon nitride quantum dots / titanium dioxide sol
[0048] At a low temperature of 0°C, add 5ml of titanium tetrachloride t...
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