g-C3N4/S-TiO2/AC photocatalyst as well as preparation method and application thereof
A photocatalyst, g-c3n4 technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of ineffective use of sunlight, high exciton binding energy, and low quantum efficiency. , to achieve the effect of good application prospects
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Embodiment 1
[0016] 1) Add 0.5 g of nanocellulose to 1-butyl-3-methylimidazolium bromide [Bmim] Br, heat up to 40 ° C under the action of ultrasonic waves, react for 4 h, and quickly freeze with liquid nitrogen for 1 h; slowly melt, Slowly add 50 mL of a mixture of tetrabutyl titanate and absolute ethanol (volume ratio 1:10) dropwise under the action of ultrasonic waves, react for 2 hours, add 3 g of thiourea, react for 5 hours, add 5 g of diaminomaleonitrile and dimer For the mixture of cyanamide (molar ratio 1:1), the temperature and pressure were raised to 200°C and 20MPa, respectively, and the heat preservation and pressure reaction was carried out for 5h, freeze-dried and ground;
[0017] 2) Under the protection of high-purity nitrogen, the ground sample was heated up to 400°C at 5°C / min, kept at a constant temperature for 1h, then raised to 520°C at 10°C / min, kept for 2h, and cooled naturally to room temperature to obtain the g-C 3 N 4 / S-TiO 2 / AC photocatalyst.
Embodiment 2
[0019] 1) Add 0.5 g of nanocellulose to 1-butyl-3-methylimidazolium bromide [Bmim] Br, heat up to 40 ° C under the action of ultrasonic waves, react for 4 h, and quickly freeze with liquid nitrogen for 1 h; slowly melt, Slowly add 50 mL of a mixture of tetrabutyl titanate and absolute ethanol (volume ratio 1:10) dropwise under the action of ultrasonic waves, react for 2 hours, add 3 g of thiourea, react for 5 hours, add 5 g of diaminomaleonitrile and dimer For the mixture of cyanamide (molar ratio 2:1), the temperature and pressure were raised to 250°C and 20MPa respectively, and the heat preservation and pressure reaction was carried out for 5h, freeze-dried and ground;
[0020] 2) Under the protection of high-purity nitrogen, the ground sample was heated up to 400°C at 5°C / min, kept at a constant temperature for 1h, then raised to 520°C at 10°C / min, kept for 2h, and cooled naturally to room temperature to obtain the g-C 3 N 4 / S-TiO 2 / AC photocatalyst.
Embodiment 3
[0022] 1) Add 0.5 g of nanocellulose to 1-butyl-3-methylimidazolium bromide [Bmim] Br, heat up to 40 ° C under the action of ultrasonic waves, react for 4 h, and quickly freeze with liquid nitrogen for 1 h; slowly melt, Slowly add 50 mL of a mixture of tetrabutyl titanate and absolute ethanol (volume ratio 1:10) dropwise under the action of ultrasonic waves, react for 2 hours, add 3 g of thiourea, react for 5 hours, add 5 g of diaminomaleonitrile and dimer For the mixture of cyanamide (molar ratio 3:1), the temperature and pressure were raised to 300°C and 25MPa respectively, and the heat preservation and pressure reaction was carried out for 5h, freeze-dried, and ground;
[0023] 2) Under the protection of high-purity nitrogen, the ground sample was heated up to 400°C at 5°C / min, kept at a constant temperature for 1h, then raised to 520°C at 10°C / min, kept for 2h, and cooled naturally to room temperature to obtain the g-C 3 N 4 / S-TiO 2 / AC photocatalyst.
[0024] Catal...
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