pd/crystalline carbon nitride heterojunction photocatalyst and preparation method and application of photocatalytic Ullmann coupling reaction
A photocatalyst, coupling reaction technology, applied in physical/chemical process catalysts, photochemical reaction preparation of amino compounds, organic chemical methods, etc., can solve the problems of limiting the application of nitrogen-carbon polymers, low surface area active site charge recombination rate, etc. , to achieve the effect of green reaction system, short reaction time, good repeatability and stability
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Embodiment 1
[0035] 1. Preparation of g-C 3 N 4 Nanosheets
[0036] Place 3g of melamine in a crucible with a cover, place it in a muffle furnace, raise the temperature to 550°C at a rate of 5°C / min, and keep it warm for 4 hours to obtain 600mg g-C 3 N 4 Nanosheets.
[0037] 2. Preparation of crystalline carbon nitride nanoribbons
[0038] 600mg g-C 3 N 4Nanosheets, 3.3g of potassium chloride and 2.7g of anhydrous lithium chloride were ground and mixed evenly and put into a porcelain boat, calcined at 450°C for 4 hours in an argon atmosphere, cooled naturally to room temperature, and cleaned with deionized water and ethanol. Vacuum drying at 60°C for 12 hours to obtain crystalline carbon nitride nanobelts.
[0039] 3. Preparation of Pd / Crystalline Carbon Nitride Heterojunction Photocatalyst
[0040] Taking the mass of the catalyst as 100%, and according to the loading capacity of Pd as 6%, 300 mg of crystalline carbon nitride nanobelts were uniformly dispersed in 40 mL of methanol,...
Embodiment 2
[0045] In this example, based on the mass of the catalyst as 100%, and according to the loading of Pd as 1%, 300 mg of crystalline carbon nitride nanobelts were uniformly dispersed in 40 mL of methanol, and 40 mL of 0.0007 mol / L palladium acetate in methanol was added, Other steps are identical with embodiment 1, obtain Pd / crystalline carbon nitride heterojunction photocatalyst (recorded as Pd 1 / CN-C).
Embodiment 3
[0047] In this example, based on the mass of the catalyst as 100%, and according to the loading of Pd as 3%, 300 mg of crystalline carbon nitride nanobelts were uniformly dispersed in 40 mL of methanol, and 40 mL of 0.0021 mol / L palladium acetate methanol solution was added, Other steps are identical with embodiment 1, obtain Pd / crystalline carbon nitride heterojunction photocatalyst (recorded as Pd 3 / CN-C).
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