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honeycomb porphyrin cop and g-c 3 no 4 Synthesis of Composite Materials and Its Application in Photocatalytic Degradation of Dyes

A composite material, g-c3n4 technology, applied in the field of new inorganic composite materials, can solve the problems of limitation, low specific surface area, and high synthesis cost of porphyrin COP, and achieve the effects of low cost, increased absorption range, and new synthesis methods

Active Publication Date: 2022-04-15
HENAN INST OF SCI & TECH
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Problems solved by technology

However, the synthesis cost of porphyrin COP is relatively high, how to ensure that the catalyst cost can be reduced without reducing the catalytic ability is also a problem that needs to be considered
[0004] The same two-dimensional material graphitic nitrogen carbide (g-C 3 N 4 ) The synthetic method of the semiconductor material is simple, and the raw materials are industrially produced chemical raw materials such as urea or melamine, and g-C 3 N 4 It has attracted attention due to its good stability, non-toxicity, narrow bandgap, and low price. However, due to g-C 3 N 4 The high photogenerated charge recombination rate and low specific surface area of ​​the material limit the direct application of the material in photocatalysis. Therefore, how to improve the photocatalytic performance of the material is a key issue for this type of material. Hybrid, compound with other inorganic semiconductor materials, dye sensitization and other methods to increase its charge separation efficiency, and the two-dimensional porphyrin COP material and two-dimensional g-C 3 N 4 Examples of material composites have not been reported so far

Method used

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  • honeycomb porphyrin cop and g-c <sub>3</sub> no <sub>4</sub> Synthesis of Composite Materials and Its Application in Photocatalytic Degradation of Dyes
  • honeycomb porphyrin cop and g-c <sub>3</sub> no <sub>4</sub> Synthesis of Composite Materials and Its Application in Photocatalytic Degradation of Dyes
  • honeycomb porphyrin cop and g-c <sub>3</sub> no <sub>4</sub> Synthesis of Composite Materials and Its Application in Photocatalytic Degradation of Dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] g-C 3 N 4 Preparation of melamine: put 15g of melamine in an alumina crucible, cover the lid, put it into a muffle furnace, heat at a rate of 10°C / min, and heat for 1 hour at 550°C under the protection of nitrogen to obtain a light yellow powder g-C 3 N 4 7.8g.

[0032] 2wt% CuDAPP-TP-COP / g-C 3 N 4 Preparation: Weigh g-C 3 N 4 200mg, trialdehyde pyroglucinol 2mg, then add two drops of o-dichlorobenzene and n-butanol (volume ratio 1:1) mixed solution and 1 drop of 6M acetic acid solution, grind for 0.5h, then add 4mg 5,15-di( 4-aminobenzene)-10,20-diphenylporphyrin copper, then add two drops of a mixed solution of o-dichlorobenzene and n-butanol (1:1) and 1 drop of 6M acetic acid solution, continue grinding for 2 hours, and finally use three Chloromethane, methanol wash, filter and dry to get 2wt% CuDAPP-TP-COP / g-C 3 N 4 ; Prepare 1wt% CuDAPP-TP-COP / g-C by the same method 3 N 4 , 3wt% CuDAPP-TP-COP / g-C 3 N 4 , 4wt% CuDAPP-TP-COP / g-C 3 N 4 and CuDAPP-TP-...

Embodiment 2

[0035] Photocatalytic degradation experiment: In order to further explore the synthesis of CuDAPP-TP-COP / 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.

[0036] Take 20mg catalyst (CuDAPP-TP-COP, g-C 3 N 4 , 1wt% CuDAPP-TP-COP / g-C 3 N 4 , 2wt% CuDAPP-TP-COP / g-C 3 N 4 , 3wt% CuDAPP-TP-COP / g-C 3 N 4 , 4wt% CuDAPP-TP-COP / g-C 3 N 4 ), then add 50mL 10mg / L RhB aqueous solution. After stirring for 1 hour without light to reach adsorption equilibrium, the RhB aqueous solution was irradiated with a 400nm filter xenon lamp light source, and the reaction solution was taken every 15 minutes, centrifuged, and the supernatant was taken to measure its absorbance.

[0037] Such as figure 2 Shown, combined with 1%, 2%, 3%, 4% CuDAPP-TP-COP / g-C 3 N 4 Material degradability and pure g-C 3 N 4 Compared with significantly improved, pure g-C 3 N 4 The degradation eff...

Embodiment 3

[0039] pH condition screening: take 20mg 2wt% CuDAPP-TP-COP / g-C 3 N 4 , then add 50mL (10 mg / L) RhB aqueous solution, adjust the pH of the solution to 3, 5, 7 with 1mol / L hydrochloric acid solution, and ultrasonically ensure that the catalyst is completely dispersed. After dark adsorption for 1 hour to reach adsorption equilibrium, the RhB aqueous solution was irradiated with a 400nm filter xenon lamp light source, and the reaction solution was taken every 3 minutes, centrifuged, and the supernatant was taken to measure its absorbance. 2wt% CuDAPP-TP-COP / g-C in pH 5 solution 3 N 4 It showed the best catalytic performance, and the catalytic efficiency reached 100% in 12 minutes.

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Abstract

The invention discloses the synthesis of honeycomb structure porphyrin COP and g-C3N4 composite material and its application in photocatalytic degradation of dyes, belonging to the technical field of inorganic chemistry. Copper 5,15‑bis(4‑aminobenzene)‑10,20‑diphenylporphyrin was grown in situ on g‑C by grinding method with trialdehyde pryroglucinol via amine‐aldehyde condensation reaction 3 N 4 surface, the composite material CuDAPP‑TP‑COP / g‑C 3 N 4 . As a photocatalyst, the composite material can efficiently degrade rhodamine B in aqueous solution, and the degradation efficiency reaches 100%. It has excellent photocatalytic degradation ability and is expected to be practically applied in dye wastewater treatment. At the same time, the synthesis of the composite material has the advantages of mild reaction conditions, easy operation, low cost, and easy large-scale production.

Description

technical field [0001] The invention relates to a novel inorganic composite material, in particular to the synthesis of a honeycomb structure porphyrin COP and g-C3N4 composite material and its application in photocatalytic degradation of dyes, belonging to the technical field of inorganic chemistry. Background technique [0002] As a molecule selected by nature, porphyrin mainly plays the role of absorbing sunlight in the photosynthesis of chlorophyll. The advantages of mild conditions, high efficiency, and ease of photosynthesis have prompted researchers to continuously develop various porphyrin derivatives to simulate nature. In the past, the research mainly focused on the homogeneous catalysis research at the molecular level. Due to the difficulty in the recovery of homogeneous catalysts and the high cost of porphyrin synthesis, it is difficult for industrial application. Therefore, the synthesis of heterogeneous porphyrin catalysts is a hot issue in catalyst research. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J27/24C02F1/30C02F101/30
CPCB01J31/0244B01J27/24C02F1/30C02F2101/308B01J35/39
Inventor 侯玉霞王吉超韩慧娟李永芳张恩慧高佳音
Owner HENAN INST OF SCI & TECH
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