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Supramolecular polymerized carbon nitride photocatalyst and preparation method and application thereof

A supramolecular and catalyst technology, applied in the field of photocatalysis, can solve the problems of affecting the morphology and photocatalytic performance of carbon nitride, unfavorable large-scale mass production, high raw material cost, etc., and achieve superior photocatalytic degradation performance and good separation effect of photogenerated charges , the effect of high photogenerated charge separation efficiency

Active Publication Date: 2019-11-19
HUNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, in the existing supramolecular polymerization methods, hydrogen bonds are usually used as covalent bonds to carry out superpolymerization to prepare carbon nitride precursors with supramolecular structures. This supramolecular polymerization method using a single hydrogen bond as a covalent bond The prepared carbon nitride still has problems such as small specific surface area, poor separation efficiency of photogenerated charges, and low photocatalytic activity.
In addition, in the process of preparing carbon nitride precursors by supramolecular polymerization, the preparation of carbon nitride precursors is easily affected by factors such as raw material types, solvent types, raw material ratios, reaction temperature, and reaction time. Problems such as complex process, high raw material cost, high energy consumption, long time consumption, and difficult control conditions are not conducive to continuous large-scale mass production and industrial utilization. At the same time, different subsequent treatment methods and different treatment conditions will also affect the production of carbon nitride. Morphology and photocatalytic performance
The existence of the above problems greatly limits the application of supramolecular polymerization in the preparation of carbon nitride

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  • Supramolecular polymerized carbon nitride photocatalyst and preparation method and application thereof
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  • Supramolecular polymerized carbon nitride photocatalyst and preparation method and application thereof

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Embodiment 1

[0032] A preparation method of supramolecular polymerization carbon nitride photocatalyst, comprising the following steps:

[0033] (1) be 4: 4: 1 according to the ratio of the amount of substance of melamine, cyanuric acid and urea, take by weighing melamine, cyanuric acid and urea (the total mass of the three is 8g); Melamine, cyanuric acid and urea were added to dimethyl sulfoxide (the total volume of dimethyl sulfoxide used was 160mL), sonicated, so that melamine, cyanuric acid and urea were completely dissolved in dimethyl sulfoxide , to obtain melamine solution, cyanuric acid solution and urea solution.

[0034] (2) In a constant temperature water bath, heat the melamine solution, cyanuric acid solution and urea solution obtained in step (1) to 30°C, and keep the constant temperature, then these three solutions are mixed with each other, at a speed of 250r Molecular polymerization was carried out for 30 min under the electric stirring condition of / min. After the reacti...

Embodiment 2

[0038] A preparation method of supramolecular polymerization carbon nitride photocatalyst, comprising the following steps:

[0039] (1) According to the mass ratio of melamine, cyanuric acid and urea is 1:1:1, take by weighing melamine, cyanuric acid and urea (the total mass of the three is 8g); Polycyanuric acid and urea were added respectively in dimethyl sulfoxide (the total volume of dimethyl sulfoxide used was 160mL), sonicated, melamine, cyanuric acid and urea were respectively completely dissolved in dimethyl sulfoxide to obtain melamine solution, cyanuric acid solution and urea solution.

[0040] (2) In a constant temperature water bath, heat the melamine solution, cyanuric acid solution and urea solution obtained in step (1) to 60°C, and keep the constant temperature, then these three solutions are mixed with each other, at a speed of 250r Molecular polymerization was carried out for 30 min under the electric stirring condition of / min. After the reaction was complet...

Embodiment 3

[0044] A preparation method of supramolecular polymerization carbon nitride photocatalyst, comprising the following steps:

[0045] (1) According to the mass ratio of melamine, cyanuric acid and urea is 1:1:1, take by weighing melamine, cyanuric acid and urea (the total mass of the three is 8g); Polycyanuric acid and urea were added respectively in dimethyl sulfoxide (the total volume of dimethyl sulfoxide used was 160mL), sonicated, melamine, cyanuric acid and urea were respectively completely dissolved in dimethyl sulfoxide to obtain melamine solution, cyanuric acid solution and urea solution.

[0046] (2) In a constant temperature water bath, heat the melamine solution, cyanuric acid solution and urea solution obtained in step (1) to 30°C, and keep the constant temperature, then these three solutions are mixed with each other, at a speed of 250r Molecular polymerization was carried out for 30 min under the electric stirring condition of / min. After the reaction was complet...

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Abstract

The invention discloses a supramolecular polymerized carbon nitride photocatalyst and a preparation method and an application thereof. The supramolecular polymerized carbon nitride photocatalyst is prepared from melamine, cyanuric acid, urea and dimethyl sulfoxide through a molecular polymerization reaction and calcination. The supramolecular polymerized carbon nitride photocatalyst has the advantages of high specific surface area, high photocatalytic activity and the like, can efficiently degrade organic wastewater and is a novel visible light catalyst. The preparation method has the advantages of simple synthetic method, low raw material cost, less energy consumption, short time consumption, easy control of conditions and the like, is suitable for continuous large-scale batch productionand facilitates the industrial use. the supramolecular polymerized carbon nitride photocatalyst of the invention can be used for degrading the organic wastewater, has the advantages of good degradation effect and good stability, and has good practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a supramolecular polymerized carbon nitride photocatalyst and a preparation method and application thereof. Background technique [0002] With the rapid growth of industrial technology and the rapid expansion of population, the problems of global environmental pollution and resource shortage are becoming more and more serious. Traditional pollution control technologies include physical adsorption, chemical oxidation, biodegradation, etc. However, due to various reasons such as economic cost, secondary pollution, and energy consumption, these technologies can no longer meet the basic needs of environmental purification. Therefore, exploring a low-energy, low-cost, and environmentally friendly pollution control technology is the most urgent task at present. Photocatalytic technology is an environmentally friendly technology with important application prospects in the fields o...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/30C02F2101/308C02F2101/38B01J35/39
Inventor 黄瑾辉史亚慧曾光明程文健于瀚博顾岩岭史丽秀易开心
Owner HUNAN UNIV
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