Flexible recyclable C3N4/ZIF-8 composite nanofiber photocatalytic membrane and preparation method thereof
A composite nanofiber, ZIF-8 technology, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of difficult recovery of photocatalysts, low catalytic degradation, etc. problem, to achieve the effect of improving visible light catalytic performance and improving separation efficiency
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Embodiment 1
[0039] Preparation of C by direct calcination 3 N 4 Nanosheets:
[0040] A certain amount of melamine powder is directly put into the ceramic ark, and the ceramic ark is placed in a muffle furnace for calcination. After heating, it is naturally cooled down to room temperature, because the fired product C 3 N 4 For bulk solids, to ensure C 3 N 4 It is a nano-scale sheet, which needs to be ground in a mortar for 30min to obtain the final product C 3 N 4 Nanosheets.
Embodiment 2
[0042] Preparation of PAN-C by Electrospinning 3 N 4 Nanofiber Membrane:
[0043] C prepared in Example 1 3 N 4 Nanosheets, dissolve 2g in 20mL of N,N-dimethylformamide solution, and sonicate for 30min to remove C 3 N 4 It was peeled off into a smaller sheet-like structure, and 2.5 g of polyacrylonitrile (molecular weight: 150,000) was added to it, and the solution was magnetically stirred at 50 °C for 2 hours. After stirring evenly, the prepared spinning precursor solution was allowed to stand. Chen Hua for one night.
[0044] The prepared spinning precursor solution was transferred to the microflow syringe pump, the anode of the high-voltage electrostatic power supply was connected to the spinneret through a wire, and the aluminum foil plate of the receiving device was grounded. The spinneret is 12cm-15cm away from the receiving device, the air humidity is controlled below 40%, and the spinning fibers are continuously collected for 10h. Denote the collected fiber as P...
Embodiment 3
[0046] PAN-C 3 N 4 The preparation method of / ZIF-8 composite flexible nanofiber photocatalytic film 1 comprises the following steps:
[0047] The PAN-C prepared in specific example 2 3 N 4 100mg of fiber was soaked in a solution of 0.074g (CH 3 COO) 2 25mL methanol solution of Zn for 5min, 0.164g C 4 H 6 N 2 Dissolved in 25mL methanol solution, under magnetic stirring, the C 4 H 6 N 2 The methanol solution was added dropwise to (CH 3 COO) 2 Zn in methanol solution, and maintain slow magnetic stirring for 12h. After stirring, the fibers were taken out and washed twice with deionized water and absolute ethanol, and dried in a vacuum oven at 60 °C for 2 h, and recorded as PAN-C. 3 N 4 / ZIF-8 composite catalyst 1, the photocatalytic degradation efficiency of Rhodamine B was 54.5%.
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