Exfoliated tubular carbon nitride photocatalyst and preparation method and application thereof

A photocatalytic reaction and catalyst technology, applied in the field of visible light catalysis, can solve the problems of dangerous operating environment, tubular structure damage, harsh conditions, etc., and achieve the effects of excellent photocatalytic performance, low recombination rate, and many active sites.

Active Publication Date: 2021-07-23
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used methods for stripping carbon nitride mainly include strong acid stripping, high-temperature calcination stripping, and ultrasonic stripping. Necessary; at the same time, the severe reaction conditions lead to the destruction of the tubular structure during exfoliation

Method used

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  • Exfoliated tubular carbon nitride photocatalyst and preparation method and application thereof
  • Exfoliated tubular carbon nitride photocatalyst and preparation method and application thereof
  • Exfoliated tubular carbon nitride photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for preparing a peeling tubular carbon nitride photocatalyst, which is prepared by hydroelectric processes and calcination in melamine and potassium bromide, including the following steps:

[0054] S1, 1.26 g of melamine in 80 ml of pure water, heated under a water bath at 80 ° C and stirred at a rotational speed of 300 rpm, and the melamine was completely dissolved in water to obtain a clear solution.

[0055] S2, 0.357 g of potassium bromide was added to the clarified solution obtained in step S1, continued to heat at 80 ° C water bath and stirred at a rotational speed for 30 min, resulting in a clear mixing solution.

[0056] S3, transferring the mixed solution obtained in step S2 to 100 ml of autoclave, water heat reactions at 180 ° C for 10 h, after natural cooling, the resulting reaction product was purified 3 times with pure water, filtration at a temperature of 40 ° C It was dried at 60 ° C for 12 h to give the precursor.

[0057]S4, put the precursor obtai...

Embodiment 2

[0073] A release tubular carbon nitride photocatalyst in degradation of organic contaminants, specifically, the peeling tubular carbon nitride photocatalyst (KCN-1, KCN-2, KCN-3) prepared using the extract (KCN-1, KCN-2, KCN-3) in Example 1. Tetracycline in hydrochloride, including the following steps:

[0074] The peeling tubular carbon nitride photocatalyst (KCN-1, KCN-2, KCN-3) prepared in Example 1 and the unlimited monomerified carbon nitride photocatalyst (CN) obtained in Comparative Example 1 The unfoliated tubular carbon nitride photocatalyst (TCN) prepared in Comparative Example 2, each of which was added to 50 mL, and the concentration of 10 mg / L, a pH of a hydrochloride (TCH) solution having a pH of 4.86, mixed Uniform, in the case of room temperature and 300 rpm, the hydrochloride tetracyransin is darkened, and the adsorption desorption balance is reached after 30min; the mixture reaches the adsorption equilibrium is placed under a xenon lamp (λ> 420 nm), and light a...

Embodiment 3

[0077] A release tubular carbon nitride photocatalyst is degraded in degraded organic contaminants, in particular to degrade the tubular carbon nitride photocatalyst (KCN-2) prepared in Example 1 to degrade the tetracycline in different pH hydrochlorides, Include the following steps:

[0078] The peeling tubular carbon nitride photocatalyst (KCN-2) obtained in Example 1 was taken, each of which was added to a hydrochloride (TCH) solution added to the initial pH of 3, 5, 7, 9, 11, respectively. (These solutions were 50 ml, the concentration was 10 mg / L), mixed uniform, darkened with tetracycline of hydrochloride under conditions of room temperature, 300 rpm, and reached adsorption desorption balance after 30min; a mixture of adsorption equilibrium Under xenon lamp (λ> 420 nm), a photocatalytic reaction was carried out at room temperature and 300 rpm for 90 min, and the treatment of tetracycline (TCH) of hydrochloride was completed.

[0079] Figure 9 The degradation effect of the...

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Abstract

The invention discloses an exfoliated tubular carbon nitride photocatalyst as well as a preparation method and application thereof. The preparation method of the exfoliated tubular carbon nitride photocatalyst comprises the following steps: mixing a nitrogen-containing raw material and potassium halide to prepare a mixed solution, and carrying out a hydrothermal reaction and calcination to prepare the exfoliated tubular carbon nitride photocatalyst. The exfoliated tubular carbon nitride photocatalyst prepared by the invention has the advantages of large specific surface area, multiple active sites, low photo-induced electron-hole pair recombination rate, strong visible light absorption ability, high photocatalytic activity and the like, is a novel visible light photocatalyst with novel morphology and structure and excellent photocatalytic performance, can be widely used for degrading organic pollutants and producing H2O2, and presents high practical application value; and meanwhile, the preparation method does not need additional templates, dangerous reagents or raw materials harmful to the environment, has the advantages of being simple in process, easy to operate, low in cost, high in safety, high in preparation efficiency and the like, and is suitable for large-scale preparation and beneficial to industrial application.

Description

Technical field [0001] The present invention belongs to the field of visible photocatalysis, and involves a peeling tubular carbon nitride photocatalyst and a preparation method thereof. Background technique [0002] With the rapid development of social economy, environmental and energy issues have become an issue where it is urgent to solve today. Organic pollutants' pollution and hazards of the environment are more common environmental pollution problems, including antibiotics, dyes, and the like. Taking antibiotics as an example, it is a common organic pollutant, and because antibiotics are the most common medical drugs, it has been widely used in medical industries, animal husbandry, and aquaculture industry, etc., however, excessive use Antibiotics can cause it in environmental media such as natural water, sewage and soil in the biological body, which may cause a chemical resistant strain in ambient organism to cause environmental organisms to produce a chemical and chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B21/082C01B15/027C02F1/30C02F101/30C02F101/38
CPCB01J27/24B01J35/004C01B21/0605C02F1/30C01B15/027C01P2004/03C01P2002/72C01P2004/04C01P2002/01C02F2305/10C02F2101/38C02F2101/30Y02W10/37
Inventor 吴婷刘智峰何清云邵彬彬梁清华潘园汤琳袁兴中刘洋黄靖彭赞赵陈慧
Owner HUNAN UNIV
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