Method for preparing triazine/heptaazine allotropic heterojunction carbon nitride photocatalyst
A technology for forming carbon nitride photocatalysts, applied in the field of photocatalytic materials, can solve the problem of low performance of photocatalysts, and achieve the effects of simple and easy operation, good reproducibility and simple process in the preparation process
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Embodiment 1
[0026] The preparation of the adduct of melamine and melamine is as follows: Weigh 1.0 g of melamine and place it in a 20 mL ceramic crucible and cover the crucible. Then the crucible was placed in a tube furnace, and the temperature was programmed to rise to 370°C at a rate of 2°C / min under an argon atmosphere with a flow rate of 100mL / min. After keeping for 4 hours, it was allowed to cool naturally to room temperature to prepare white melamine and Adducts of melamine. Subsequently, 0.2 g of the calcined adduct material of melamine and melamine was weighed, placed in an agate mortar in a glove box under nitrogen protection, mixed with 2.7 g of lithium chloride and 3.3 g of potassium chloride, and then thoroughly ground. The above milled mixture was then poured into a ceramic crucible and covered. Afterwards, the crucible containing the mixture was placed in the tube furnace again, and the temperature was programmed to 550 °C at a rate of 10 °C / min under an argon atmosphere w...
Embodiment 2
[0028] The preparation of the adduct of melamine and melamine is as follows: Weigh 4.0 g of melamine and place it in an 80 mL ceramic crucible and cover the crucible. Then the crucible was placed in a tube furnace, and the temperature was programmed to rise to 390°C at a rate of 5°C / min under an argon atmosphere with a flow rate of 200mL / min. Adducts of melamine. Subsequently, 0.4 g of the calcined adduct material of melamine and melamine was weighed, placed in an agate mortar in a glove box under nitrogen protection, mixed with 2.7 g of lithium chloride and 3.3 g of potassium chloride, and then thoroughly ground. The above milled mixture was then poured into a ceramic crucible and covered. Afterwards, the crucible containing the mixture was placed in the tube furnace again, and the temperature was programmed to 560 °C at a rate of 15 °C / min under an argon atmosphere with a flow rate of 200 mL / min, and kept for 4 h, and then allowed to cool naturally The solid solution of tr...
Embodiment 3
[0030] The preparation of the adduct of melamine and melamine is as follows: Weigh 8.0 g of melamine and place it in a 100 mL ceramic crucible and cover the crucible. Then the crucible was placed in a tube furnace, and the temperature was programmed to rise to 430° C. at a rate of 5° C. / min under an argon atmosphere with a flow rate of 350 mL / min. After keeping for 20 hours, it was allowed to cool naturally to room temperature to prepare white melamine and Adducts of melamine. Subsequently, 1.0 g of the calcined adduct material of melamine and melamine was weighed, placed in an agate mortar in a glove box under nitrogen protection, mixed with 2.7 g of lithium chloride and 3.3 g of potassium chloride, and then thoroughly ground. The above milled mixture was then poured into a ceramic crucible and covered. Afterwards, the crucible containing the mixture was placed in the tube furnace again, and the temperature was programmed to 600 °C at a rate of 20 °C / min under an argon atmos...
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