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Method for photocatalytic degradation of organic pollutants by using defective metal organic framework photocatalyst

A metal-organic framework and organic pollutant technology, which is applied in the application field of photocatalysis, can solve the problems of easy dissolution of toxic metal ions, potential environmental harm, poor treatment effect, etc., and achieves easy recovery and reuse, low cost, good quality Use value and effect of application prospects

Active Publication Date: 2019-04-19
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of adding electron acceptors has poor treatment effect, complex preparation, and potential environmental hazards; while heterojunction photocatalysis is prone to photocorrosion, and toxic metal ions are easy to dissolve, which may cause environmental hazards and cause Secondary pollution

Method used

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  • Method for photocatalytic degradation of organic pollutants by using defective metal organic framework photocatalyst
  • Method for photocatalytic degradation of organic pollutants by using defective metal organic framework photocatalyst
  • Method for photocatalytic degradation of organic pollutants by using defective metal organic framework photocatalyst

Examples

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Effect test

Embodiment 1

[0037] A method for photocatalytically degrading organic pollutants using a defect-type metal-organic framework photocatalyst, specifically using a defect-type MIL-53 metal-organic framework photocatalyst to photocatalyze degradation of tetracycline in water, comprising the following steps:

[0038] Take defective metal-organic framework photocatalysts (D-1, D-2, D-3, D-4, D-5, D-10) and perfect MIL-53 metal-organic framework photocatalysts (MIL-53), Add 50 mg each into 100 mL tetracycline solution with a concentration of 20 mg / L, ultrasonically uniform, and react for 60 min in the absence of light (magnetic stirring). Illuminated for 150 minutes, the photocatalytic degradation reaction was carried out, and the photocatalytic degradation of tetracycline in the water body was completed.

[0039] In this example, the defect-type metal-organic framework photocatalysts (D-1, D-2, D-3, D-4, D-5, D-10) used are specifically defect-type MIL-53 metal-organic framework photocatalysts. ...

Embodiment 2

[0053] A method for photocatalytically degrading organic pollutants using a defect-type metal-organic framework photocatalyst, specifically using a defect-type MIL-53 metal-organic framework photocatalyst to perform photocatalytic degradation of tetracycline in water with different concentrations, comprising the following steps:

[0054] Get 4 parts of defective metal-organic framework photocatalysts (D-1) prepared in Example 1, every part of 50mg, add to the tetracycline solution that concentration is 10mg / L, 20mg / L, 30mg / L, 40mg / L respectively (volume is 100mL), ultrasonic evenly, react in the absence of light for 60min (magnetic stirring), after reaching the equilibrium of adsorption and desorption, under the condition of visible light with wavelength λ > 420nm, light for 150min, carry out photocatalytic degradation reaction, complete the Photocatalytic degradation of tetracyclines in water.

[0055] Sample 3mL every 30min, measure the characteristic peak value of tetracycl...

Embodiment 3

[0058] A method for photocatalytically degrading organic pollutants using a defect-type metal-organic framework photocatalyst, specifically utilizing a defect-type MIL-53 metal-organic framework photocatalyst to degrade tetracycline cyclically, comprising the following steps:

[0059] (1) Take 50 mg of the defect-type metal-organic framework photocatalyst (D-1) prepared in Example 1, add it to 100 mL of tetracycline solution with a concentration of 20 mg / L, ultrasonicate evenly, and react for 60 min in the absence of light (Magnetic stirring), after reaching the adsorption-desorption equilibrium, under the condition of visible light with wavelength λ>420nm, light for 150min, carry out photocatalytic degradation reaction, and complete the photocatalytic degradation of tetracycline in the water body.

[0060] (2) After the photocatalytic degradation reaction in step (1) was completed, the remaining samples were collected and dried. Under the same experimental conditions, the tetr...

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Abstract

The invention discloses a method for photocatalytic degradation of organic pollutants by using a defective metal organic framework photocatalyst, which adopts the defective metal organic framework photocatalyst to perform photocatalytic degradation on organic pollutants, wherein the defective metal organic framework photocatalyst is prepared by solvent thermal reaction under the action of an acidregulator and taking ferric trichloride hexahydrate and terephthalic acid as raw materials, and N, N-dimethyl formamide as a solvent; the defective metal organic framework photocatalyst is a defect type MIL-53 metal organic framework photocatalyst. The method for photocatalytic degradation of organic pollutants by using the defective metal organic framework photocatalyst has the advantages of simple process, convenient operation, low cost, easy recycling, high treatment efficiency, high degradation rate and the like, can achieve effective and rapid degradation of organic pollutants, and has good application prospect in the actual treatment of the organic pollutant wastewater.

Description

technical field [0001] The invention belongs to the application field of photocatalysis, and relates to a method for photocatalytically degrading organic pollutants by using a defect-type metal-organic framework photocatalyst. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and environment. In recent years, research on photocatalytic application technology has developed very rapidly. This new technology has the advantages of low energy consumption, simple operation process, and mild reaction conditions. It can completely oxidize organic matter in water, air, and soil into non-toxic, non-toxic Harmful substances, avoiding secondary pollution. Especially in the degradation of organic pollutants, it can effectively degrade a variety of organic wastewater including antibiotic pharmaceutical wastewater, sulfur-containing fuel wastewater, fermentation production wastewater, fine chemical wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/30C02F101/30
CPCC02F1/30B01J31/1691B01J31/2213C02F2101/30C02F2305/10B01J2531/842B01J35/39B01J35/612
Inventor 姜丹妮曾光明黄丹莲陈明周成赟宋彪刘洋熊炜平汪文军杨洋易欢
Owner HUNAN UNIV
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