Polyaniline/perylene bisimide organic heterojunction photocatalyst and preparation method and application thereof
A perylene imide and photocatalyst technology, applied in the field of nanomaterials, can solve the problems of environmental secondary pollution, toxic transition metals, etc., and achieve the effects of no secondary pollution, low cost, and improved catalytic stability
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Embodiment 1
[0038] Embodiment 1: A kind of preparation method of polyaniline / peryleneimide organic heterojunction photocatalyst, comprises the following steps:
[0039]5 mmol phytic acid and 25 mmol aniline were dissolved in 10 ml deionized water and stirred as solution A, and 6.25 mmol ammonium persulfate was dissolved in 5 ml deionized water as solution B. Aniline, phytic acid and ammonium persulfate were used as monomer, crosslinking agent and initiator, respectively. The solution A and solution B were simultaneously cooled to 4 °C, and then mixed rapidly, and a dark green hydrogel was obtained after about 5 minutes. Pour the reacted mixture into a beaker and add a large amount of deionized water for 20-30 hours of immersion. Pour the reacted mass into a beaker and soak in plenty of deionized water to remove excess acid or other soluble matter. After soaking for 20-30 hours, centrifuge and wash for many times, and heat-dry the obtained dark green polyaniline gel in a vacuum oven at 6...
Embodiment 2
[0045] Example 2, Evaluation of Pollutant Degradation Activity of Polyaniline / Peryleneimide Organic Heterojunction Photocatalyst
[0046] The highly active and highly stable polyaniline / peryleneimide organic heterojunction photocatalyst prepared in Example 1 was tested for the activity of photocatalytic degradation of pollutants, and the target pollutant was tetracycline (TC);
[0047] The experimental conditions are as follows: the initial concentration of tetracycline aqueous solution is 2×10 -5 mol / L, the volume of the reaction tube was 50 mL, and the dosage of the catalyst was 25 mg. The photocatalytic performance was evaluated using a 5W visible light evaluation device (PCX50B, λ>420nm).
[0048] Before the photocatalytic reaction, the mixed solution of the catalyst and tetracycline was ultrasonically treated for 10 minutes, and then stirred in a dark environment for 1 hour to mix thoroughly, so that the polyaniline / peryleneimide photocatalyst TC solution reached adsorpt...
Embodiment 3
[0049] In order to further evaluate the photocatalytic stability of 20%-polyaniline / peryleneimide, 6 cyclic photocatalytic experiments of degrading TC 20mg / L and a self-made rectangular reactor were carried out (Applied Catalysis B: Environmental, 2016 , 183:263-268) dynamic photocatalytic experiments (flow rate 20mg / L, 2.5 mL / min). From Figure 4 It can be observed that the photocatalysis of 20%-polyaniline / peryleneimide after 5 reactions still maintains a high activity. Figure 5 It is the experimental result of dynamic photocatalytic reaction for up to 75 hours, and the catalytic activity of polyaniline / peryleneimide is basically unchanged. It shows that the stability of 20%-polyaniline / peryleneimide photocatalytic group is very good, which indicates that this material has a good application prospect. Embodiment 3, polyaniline / peryleneimide organic heterojunction photocatalyst prepares hydrogen peroxide (H 2 o 2 ) activity assessment
[0050] The activity test of the p...
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