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Method for treating antibiotic wastewater by using nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst

A technology for tungsten nitride modification and antibiotic wastewater, which is applied in special compound water treatment, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that catalysts cannot efficiently degrade and remove organic pollutants, limit silver phosphate recombination The promotion and application of photocatalysts, the low performance of high sulfate resistance, etc., achieve the effect of repeated treatment, high use value, and good performance of high sulfate resistance

Active Publication Date: 2021-06-15
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modified silver phosphate catalyst still has the disadvantages of low photogenerated electron-hole pair separation efficiency, weak photocorrosion resistance, and weak photocatalytic activity, which lead to the catalyst not being able to meet the requirements of efficient degradation and removal of organic pollutants, thus greatly Limit the popularization and application of the existing silver phosphate composite photocatalyst
Therefore, how to overcome the problems of low photogenerated electron-hole pair separation efficiency, poor photocatalytic activity, poor reusability, and low resistance to high sulfate in the existing silver phosphate materials, so as to obtain a photocatalytic activity, repeatability, etc. The modified silver phosphate composite photocatalyst with good utilization and high sulfate resistance is of great significance for the effective treatment of high-salt penicillin wastewater

Method used

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  • Method for treating antibiotic wastewater by using nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst
  • Method for treating antibiotic wastewater by using nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst
  • Method for treating antibiotic wastewater by using nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst

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Effect test

Embodiment 1

[0053] A method for treating antibiotic wastewater by using a nitrogen vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst, specifically using a nitrogen-vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst to treat penicillin wastewater, including the following step:

[0054] Nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst (Ag 3 PO 4 @1.0mL W 2 N 3 -NV, Ag 3 PO 4 @2.5mLW 2 N 3 -NV, Ag 3 PO 4 @5.0mL W 2 N 3 -NV, Ag 3 PO 4 @7.5mLW 2 N 3 -NV, Ag 3 PO 4 @10mL W 2 N 3 -NV), silver phosphate photocatalyst (Ag 3 PO 4 ), each 50mg, were added to 100mL penicillin solution with a concentration of 20mg / L, ultrasonicated for 1min, stirred and reacted in the dark for 30min, after reaching the adsorption equilibrium, degraded under the irradiation condition of 300W xenon lamp (λ>420nm) reaction.

[0055] Blank group: penicillin wastewater was treated without adding photo...

Embodiment 2

[0076] A method for treating waste water containing high sulfate penicillin by using nitrogen vacancy-doped tungsten nitride modified silver phosphate composite photocatalyst, which is basically the same as that of Example 1, the only difference being that different Concentration of sodium sulfate, the concentrations are 0, 1000mg / L, 5000mg / L, 10000mg / L, 50000mg / L, 100000mg / L.

[0077] figure 2 It is a graph showing the degradation effect of penicillin by nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst in Example 2 of the present invention under different concentrations of sulfate. Depend on figure 2 It can be seen that under the stress of different concentrations of sulfate, the nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst still maintains a good degradation effect on penicillin. When the sulfate concentration is 1000mg / L, the degradation rate of the catalyst and There is no change in ef...

Embodiment 3

[0079] A method for treating antibiotic wastewater using nitrogen vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst, specifically, using nitrogen-vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst for continuous treatment of penicillin wastewater. Process flow chart as image 3 shown, including the following steps:

[0080] (1) The nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst (Ag 3 PO 4 @5.0mL W 2 N 3 -NV), added to the reaction pool of the photocatalytic reaction device (equipped with 20m 3 , Penicillin wastewater with a concentration of 20mg / L, wherein the sulfate concentration is 50000mg / L).

[0081] (2) Turn on the stirrer in the reaction pool, and mix the nitrogen vacancy-doped tungsten nitride-modified silver phosphate composite photocatalyst with the penicillin wastewater.

[0082] (3) Under the condition of continuous stirring by the stirrer, the photocatalyt...

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Abstract

The invention discloses a method for treating antibiotic wastewater by using a nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst. The antibiotic wastewater is treated by using the nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst. The nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst comprises a nitrogen vacancy doped tungsten nitride nanosheet, and silver phosphate particles are loaded on the nitrogen vacancy doped tungsten nitride nanosheet. The nitrogen vacancy doped tungsten nitride modified silver phosphate composite photocatalyst is adopted to treat the antibiotic wastewater, effective removal of antibiotics in the wastewater is achieved through the degradation effect of the catalyst, and the method has the advantages of being low in cost, high in treatment efficiency, good in removal effect, good in repeated treatment effect and the like; and the method is suitable for antibiotic wastes with various properties, the antibiotics in the wastewater can be completely degraded and removed under the stress of high sulfate, the adaptability is very good, and the method has very high use value and very good application prospects.

Description

technical field [0001] The invention belongs to the technical fields of semiconductor material photocatalysis application and environmental protection, relates to a method for treating antibiotic wastewater, and specifically designs a method for treating antibiotic wastewater using a silver phosphate composite photocatalyst modified by nitrogen vacancies doped with tungsten nitride. Background technique [0002] With the rapid development of economy and modern industry, the environmental and ecological pollution caused by antibiotics has become one of the most serious problems today. Taking penicillin as an example, penicillin is a kind of antibiotic, which refers to a class of antibiotics containing penicillane in the molecule, which can destroy the cell wall of bacteria and play a bactericidal effect during the reproduction period of bacterial cells. It is an antibiotic extracted from penicillium . It is widely used because of its high efficacy in treating bacterial infec...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2305/10C02F2101/30B01J35/39
Inventor 杨春平聂金林林燕吴少华钟淇麦文欣林倩池雨嫣
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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