Method for preparing carbon nitride material with nano sheet/nano tube composite structure
A nanotube composite and nanosheet technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited photocatalytic performance improvement and single morphology, and achieve improved photocatalytic performance , simple process, and the effect of reducing mass transfer resistance
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Embodiment 1
[0032] Step 1, according to the mass ratio of melamine and deionized water is 1:10, the mass ratio of potassium fluoride and deionized water is 1:50, add melamine, potassium fluoride and deionized water into clean polytetrafluoroethylene Mix in the lining and stir evenly; cover the above-mentioned polytetrafluoroethylene lining with a lid, put it into the corresponding stainless steel jacket, tighten it, put it in an oven, and keep it warm at 200 ° C for 12 hours; after cooling with the furnace, the obtained solid-liquid mixture , with deionized water and absolute ethanol to wash five times by centrifugation; then dry in an oven at 70°C for 20 hours to obtain a white modified melamine precursor.
[0033] Step 2, put the precursor obtained in step 1 into an alumina crucible, and cover it; heat preservation at 550°C for 3.5h, calcining at a heating rate of 0.5°C / min, to obtain a nanosheet / nanotube composite structure of carbon nitride materials.
[0034] The g-C that embodiment...
Embodiment 2
[0036] Step 1, according to the mass ratio of melamine and deionized water is 1:10, and the mass ratio of potassium bromide and deionized water is 1:50, add melamine, potassium bromide and deionized water into clean polytetrafluoroethylene Mix in the lining and stir evenly; cover the above-mentioned polytetrafluoroethylene lining with a lid, put it into the corresponding stainless steel jacket, tighten it, put it in an oven, and keep it warm at 200 ° C for 12 hours; after cooling with the furnace, the obtained solid-liquid mixture , respectively centrifuged and washed 6 times with deionized water and absolute ethanol; then dried in an oven at 60° C. for 24 hours to obtain a white modified melamine precursor.
[0037] Step 2, put the precursor obtained in step 1 into an alumina crucible, and cover it; heat preservation at 550°C for 3.5h, calcining at a heating rate of 0.5°C / min, to obtain a nanosheet / nanotube composite structure of carbon nitride materials.
[0038] The g-C th...
Embodiment 3
[0040]Step 1, according to the mass ratio of melamine and deionized water is 1:100, and the mass ratio of potassium fluoride and deionized water is 10:1, add melamine, potassium fluoride and deionized water into clean polytetrafluoroethylene Mix in the lining and stir evenly; cover the above-mentioned polytetrafluoroethylene lining with a lid, put it into the corresponding stainless steel jacket, tighten it, put it in an oven, and keep it warm at 220 ° C for 8 hours; after cooling with the furnace, the obtained solid-liquid mixture , were centrifuged and washed 8 times with deionized water and absolute ethanol respectively; then dried in an oven at 65°C for 30 hours to obtain a white modified melamine precursor.
[0041] Step 2. Put the precursor obtained in step 1 into an alumina crucible and cover it; heat preservation at 450°C for 6 hours, and calcining at a heating rate of 0.1°C / min to obtain a nanosheet / nanotube composite structure carbon nitride material.
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