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Preparation method of microcystic toxins composite material through photocatalytic degradation and application thereof

A catalytic material and composite photocatalytic technology, applied in the field of Ag3VO4/g-C3N4 composite visible photocatalytic material and its preparation, to achieve high photocatalytic activity, efficient use of solar energy, and low cost

Inactive Publication Date: 2018-09-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, about Ag 3 VO 4 / g -C 3 N 4 The report of composite photocatalytic materials on microcystin (MC-LR) in water has not involved

Method used

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  • Preparation method of microcystic toxins composite material through photocatalytic degradation and application thereof
  • Preparation method of microcystic toxins composite material through photocatalytic degradation and application thereof
  • Preparation method of microcystic toxins composite material through photocatalytic degradation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Ag 3 VO 4 / g-C 3 N 4 Preparation of composite photocatalytic material: Weigh 1g of prepared CN(32) powder, dissolve it in ultrapure water, and ultrasound for 0.5h to make the powder uniformly dispersed in the solution to obtain a light yellow suspension. Take 0.1025g AgNO 3 Dissolved in 100mL of ultrapure water. Weigh 0.37g Na 3 VO 4 ·6H 2 O is dissolved in 100mL ultrapure water, then Na 3 VO 4 The solution slowly drips into AgNO 3 In the mixed solution of CN(32), avoid light and magnetically stir for 4h to avoid Ag 3 VO 4 Photolysis, centrifugal separation, take out the precipitate, wash 4 times each with absolute ethanol and ultrapure water. Finally, it was placed in a vacuum drying oven and dried at 60°C for 10 hours. Finally, Ag is prepared 3 VO 4 / CN(32) photocatalytic material, in which Ag 3 VO 4 The mass ratio in the composite photocatalytic material is 10wt%.

[0027] figure 1 Shows Ag with different recombination ratio 3 VO 4 / CN(32) SEM characterization sample i...

Embodiment 2

[0031] The operation process is the same as in Example 1 except for the following differences.

[0032] Weigh 0.2049g AgNO 3 , 0.74g Na 3 VO 4 ·6H 2 O and 1.0g of the CN(32) powder obtained in Example 1, in which Ag 3 VO 4 The mass ratio in the composite photocatalytic material is 20wt%.

[0033] For the XRD analysis results of the samples, see figure 2 . The SEM analysis result of the sample is similar to Example 1. The visible light degradation rate of microcystin within 100 minutes of the sample is shown in image 3 .

Embodiment 3

[0035] The operation process is the same as in Example 2 except for the following differences.

[0036] Weigh 0.3074g AgNO 3 , 1.11g Na 3 VO 4 ·6H 2 O and 1.0g of the CN(32) powder obtained in Example 1, in which Ag 3 VO 4 The mass ratio in the composite photocatalytic material is 30wt%.

[0037] The XRD analysis results of the samples are shown in figure 2 . The SEM analysis result of the sample is similar to Example 2. The visible light degradation rate of microcystin within 100 minutes of the sample is shown in image 3 .

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Abstract

The invention belongs to the field of photocatalysis environmental protection, and concretely relates to an Ag3VO4 / g-C3N4 composite visible photocatalysis material for photocatalytic degradation of the microcystic toxins and a preparation method and an application thereof. Compared with a traditional processing technology, the employed photocatalysis technology has the advantages of no secondary pollution, thoroughly processing, safety and stabilization, and low cost, has obvious degraded effect for toxic organic pollutants which take microcystic toxin (MC-LR) as a representative, and no relative result is reported. The method improves a traditional polymerization method to prepare g-C3N4, a calcining precursor and its mixture proportion can be changed, and nano sheets having high crystallinity and high catalysis performance can be prepared, and the Ag3VO4 / g-C3N4 composite visible photocatalysis material with different mass ratio is successfully synthesized by a chemical precipitationmethod. The composite material can effectively reduce the photoproduction electron-cavity compounding machine rate, increases the photocatalysis efficiency, and has good application prospect for degradation of the microcystic toxins.

Description

Technical field: [0001] The invention belongs to the field of photocatalysis and environmental protection, and specifically relates to an Ag that catalyzes the degradation of microcystin 3 VO 4 / g-C 3 N 4 Composite visible light catalytic material and its preparation method and application. Background technique: [0002] In recent years, with the development of human society, environmental problems have also emerged. During the development process, a large amount of wastewater containing N and P is discharged into the water body, causing eutrophication of the water body, especially in summer cyanobacteria blooms. A variety of toxins, mainly Microcystin, are released. This toxin will target hepatocytes and cause damage or even death to the liver of animals and humans. Microcystin (MC) is a biologically active monocyclic polypeptide compound. The Adda structure in its structure determines the physiological activity of the toxin. MC is stable and resistant to acid and alkali. Gener...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J37/03B01J37/08C02F1/30C02F101/30
CPCC02F1/30B01J27/24B01J37/031B01J37/082C02F2305/10C02F2101/30B01J35/00B01J35/30B01J35/39
Inventor 焦莉王利平马佳慧凌泽玉蒋善庆汪楚乔
Owner CHANGZHOU UNIV