Preparation method of self-repairing degradable C3N4/subject-object film
A C3N4, host-guest technology, used in nanostructure manufacturing, nanotechnology, coating and other directions, can solve problems such as no reports, achieve good self-healing effect, wide application prospects, and easy operation.
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[0026] A kind of self-healing degradable C of the present invention 3 N 4 The preparation method of host-guest film comprises the steps:
[0027] Step 1, carbon nitride (C 3 N 4 ) powder was added to the branched polyethyleneimine (PEI-βCD) solution of β-cyclodextrin, ultrasonically oscillated, and centrifuged to obtain the branched polyethyleneimine (C 3 N 4 - PEI-βCD) solution;
[0028] Step 2, the C obtained in step 1 3 N 4 -PEI-βCD solution is self-assembled on the surface of the substrate as the first layer, and then the PAA-AD solution is self-assembled as the second layer. After repeating several cycles, a PAA-AD / C is prepared 3 N 4 -PEI-βCD self-healing degradable host-guest film.
Embodiment 1
[0030] 1) 1mg carbon nitride (C 3 N 4 ) powder was added branched polyethyleneimine (PEI-βCD) of 4mg / mLβ-cyclodextrin, ultrasonic vibration 60min, centrifugation speed 3500rpm, centrifugation time 5min, obtained clear milky white carbon nitride-β-cyclodextrin branched Polyethyleneimine (C 3 N 4 - PEI-βCD) solution.
[0031] 2) Soak the cleaned glass piece in 4mg / mLLC 3 N 4 -PEI-βCD solution for 15min, rinse with water to remove the physically adsorbed polymer; then soak in 4mg / mL PAA-AD solution for 15min and rinse with water; repeat the above steps for 30 cycles to obtain PAA-AD / C 3 N 4 -PEI-βCD self-healing degradable host-guest film.
[0032] figure 1 It is that embodiment 1 prepares PAA-AD / C 3 N 4 - UV absorption curve of PEI-βCD self-healing degradable host-guest film for degradation of methylene blue.
[0033] figure 2 It is that embodiment 1 prepares PAA-AD / C 3 N 4 -Physical diagram of the degradation of methylene blue by PEI-βCD self-healing degradable hos...
Embodiment 2
[0036] 1) 2mg carbon nitride (C 3 N 4 ) powder was added branched polyethyleneimine (PEI-βCD) of 5mg / mLβ-cyclodextrin, ultrasonic vibration 80min, centrifugation speed 4000rpm, centrifugation time 7min, obtained clear milky white carbon nitride-β-cyclodextrin branched Polyethyleneimine (C 3 N 4 - PEI-βCD) solution.
[0037] 2) Soak the cleaned glass piece in 5mg / mLLC 3 N 4 -PEI-βCD solution for 20min, rinse with water to remove the physically adsorbed polymer; then soak in 5mg / mL PAA-AD solution for 20min and then rinse with water; repeat the above steps for 25 cycles to obtain PAA-AD / C 3 N 4 -PEI-βCD self-healing degradable host-guest film.
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