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Preparation method of porphyrin COF and carbon nitride composite material and application in photocatalytic degradation of organic dyes

A composite material and photocatalytic technology, which is applied in the field of porphyrin-based COF materials and graphite-phase carbon nitride composite materials, and semiconductor materials, can solve the problems of limiting the practical application of COF materials, harsh synthesis conditions, and high cost of COF materials, and achieve good results. Photocatalytic degradation of organic pollutants, low cost, and improved absorption capacity

Inactive Publication Date: 2019-09-13
HENAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the cost of synthetic raw materials for COF materials is extremely high, and the synthesis conditions are relatively harsh, which limits the practical application of COF materials.

Method used

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  • Preparation method of porphyrin COF and carbon nitride composite material and application in photocatalytic degradation of organic dyes
  • Preparation method of porphyrin COF and carbon nitride composite material and application in photocatalytic degradation of organic dyes
  • Preparation method of porphyrin COF and carbon nitride composite material and application in photocatalytic degradation of organic dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] g-C 3 N 4 Preparation: Put 15g of melamine in an alumina crucible, cover it, put it into a muffle furnace, heat at a rate of 10°C / min, and heat at 550°C for 1 hour under nitrogen protection to obtain 7.8g of light yellow powder.

[0039] 8%CuP-Ph-COF / g-C 3 N 4 Preparation: weigh 100mg synthetic g-C 3 N 4 , and 2.88g terephthalaldehyde, drop two drops of a mixed solution of o-dichlorobenzene and n-butanol (volume ratio 1:1) and 1 drop of 6M acetic acid solution, grind for 0.5h, then add 8mg CuTAPP, and then drop two drops of o-dichlorobenzene Mixed solution of chlorobenzene and n-butanol (1:1) and 1 drop of 6M acetic acid solution, continued to grind for 2 hours, then washed with chloroform, filtered, and dried to obtain 8% CuP-Ph-COF / g-C 3 N 4 ; Prepare 5% CuP-Ph-COF / g-C in the same way 3 N 4 , 6% CuP-Ph-COF / g-C 3 N 4 10%CuP-Ph-COF / g-C 3 N 4 and 20% CuP-Ph-COF / g-C 3 N 4 .

[0040] Such as figure 1 Shown, CuP-Ph-COF at 1620cm -1 There is a strong absorpt...

Embodiment 2

[0045] Photocatalytic degradation of Rhodamine B: In order to further explore the synthesis of CuP-Ph-COF / g-C 3 N 4 The performance of the composite material, a series of experiments were designed to verify the efficiency of its catalytic degradation of Rhodamine B.

[0046] Take 20mg catalyst (5%CuP-Ph-COF / g-C 3 N 4 , 6% CuP-Ph-COF / g-C 3 N 4 , 8% CuP-Ph-COF / g-C 3 N 4 , 10% CuP-Ph-COF / g-C 3 N 4 , 20% CuP-Ph-COF / g-C 3 N 4 , CuP-Ph-COF, g-C 3 N 4 ), then add 50mL (10mg / L) rhodamine B aqueous solution, and ultrasonically ensure that the catalyst is added and dispersed completely. After dark reaction adsorption reached adsorption equilibrium for one hour, the rhodamine B solution was irradiated with a xenon lamp light source with a 400nm filter, and the reaction solution was taken every 15 minutes, centrifuged, and the supernatant was taken to measure its absorbance.

[0047] Such as Figure 5 Shown, composite 5%, 6%, 8%, 10%, 20% CuP-Ph-COF / g-C 3 N 4 The ability o...

Embodiment 3

[0049] Photocatalytic degradation of rhodamine B pH condition screening: take 20mg 8% CuP-Ph-COF / g-C 3 N 4 , then add 50mL (10mg / L) rhodamine B aqueous solution, adjust the pH of the solution to 1, 2, 3, 4, 7, 10 with 1mol / L hydrochloric acid solution and sodium hydroxide solution, and ultrasonically ensure that the catalyst is completely dispersed. After the dark reaction adsorption reached adsorption equilibrium for one hour, the rhodamine B solution was irradiated with a xenon light source with a 400nm filter, and the reaction solution was taken every 5 minutes, centrifuged, and the supernatant was taken to measure its absorbance and monitor the reaction progress.

[0050] Such as Figure 6 As shown, regardless of acidic or alkaline conditions, 20mg 8% CuP-Ph-COF / g-C 3 N 4 The efficiency of photocatalytic degradation of Rhodamine B is higher than that of neutral conditions, and 20mg 8% CuP-Ph-COF / g-C in pH 3 solution 3 N 4 It showed the best catalytic performance, and ...

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PUM

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Abstract

Belonging to the technical field of inorganic chemistry, the invention discloses a preparation method of a porphyrin COF and carbon nitride composite material and application in photocatalytic degradation of organic dyes. Copper tetraminophenyl porphyrin and terephthalaldehyde are compounded on the surface of g-C3N4 through amine-aldehyde condensation reaction by grinding. The method has the advantages of simple operation, mild reaction conditions, high yield, low cost, easy large-scale production and the like. The material CuP-Ph-COF / g-C3N4 is used as a photocatalyst to degrade the dye rhodamine B, shows excellent ability of photocatalytic degradation of organic pollutants, and is expected to be practically applied in dye wastewater treatment.

Description

technical field [0001] The present invention relates to a kind of porphyrin COF and g-C 3 N 4 Composite semiconductor materials, specifically related to porphyrin-based COF materials and graphite-phase carbon nitride composite materials CuP-Ph-COF / g-C 3 N 4 The preparation method and the application in photocatalytic degradation of organic dyes belong to the technical field of inorganic chemistry. Background technique [0002] With the development of society, the deterioration of the environment has attracted the attention of the whole society, especially the pollution of water, which is indispensable in our life. Among them, dye wastewater has high toxicity and difficult treatment, which has attracted many attentions. At present, the treatment of dye wastewater The methods mainly include adsorption, separation and other methods, but their application in the treatment of dye wastewater is limited due to high cost and poor effect. [0003] The photocatalytic method has th...

Claims

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Application Information

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IPC IPC(8): B01J31/22C02F1/30C02F101/30
CPCB01J31/183B01J31/1691C02F1/30B01J2531/16C02F2101/308B01J35/39
Inventor 侯玉霞王吉超李英娄慧慧刘萍张玉泉
Owner HENAN INST OF SCI & TECH
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