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

CN110465315AActive Publication Date: 2019-11-19HUNAN UNIV
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Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-11-19

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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.
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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...

Examples

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...