Eu-MOF complex, synthesis method thereof, and application of Eu-MOF complex in adsorption of organic dyes in wastewater

A technology of complexes and dyes, which is applied in the direction of adsorption of water/sewage treatment, water pollutants, and other chemical processes, and can solve problems such as poor chemical stability, long emission peak fluorescence lifetime, Stokes shift, short fluorescence lifetime, etc. , to reduce processing costs, reduce pollution, and save time

Inactive Publication Date: 2019-12-13
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Materials based on La-MOFs have sharp emission peaks, long fluorescence lifetimes, large Stokes shifts, and good water stability, while MOFs obtained from transition metals have short fluorescence lifetimes and poor chemical stability. There are certain limitations in application

Method used

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  • Eu-MOF complex, synthesis method thereof, and application of Eu-MOF complex in adsorption of organic dyes in wastewater
  • Eu-MOF complex, synthesis method thereof, and application of Eu-MOF complex in adsorption of organic dyes in wastewater
  • Eu-MOF complex, synthesis method thereof, and application of Eu-MOF complex in adsorption of organic dyes in wastewater

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Embodiment Construction

[0032] The synthesis of the Eu-MOF complex and the adsorption method of the Congo red dye of the present invention will be further described through specific examples below.

[0033] 1. Synthesis of MOF complexes

[0034] Ligand H 2L (0.0226g, 0.1mmol) was dissolved in 6 mL of acetonitrile / water (6:1 v / v), then added to a 10mL reactor, and then 0.25 mL of Eu(NO 3 ) 2 ·6H 2 Aqueous solution of O (0.4 mol∙L -1 ), stirred to form a suspension; then the suspension was placed in a 25 mL polytetrafluoroethylene autoclave and reacted at 120°C for 4 days. When the temperature dropped to room temperature, light yellow columnar crystals were obtained, washed with distilled water, and dried naturally to obtain the Eu-MOF complex. Yield 36.0%. Infrared data (KBr, cm -1 ): 3128(m), 2960(s), 2600(d), 1563(s), 1404(s), 1219(w), 1148(w), 999(w), 889(w), 773(w ), 719(w), 671(w).

[0035] 2. Application of Eu-MOF complexes in the treatment of dye wastewater

[0036] A certain amount o...

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Abstract

The invention designs and synthesizes an Eu-MOF complex. A synthesis method of the Eu-MOF complex comprises the following steps: dissolving a ligand H2L in an acetonitrile-water mixed solution, addingan aqueous Eu(NO3)2.6H2O solution, performing stirring to form a uniform suspension, adding the mixed suspension into a high-pressure reaction kettle, and performing a reaction at 120-130 DEG C for 90-100 h; and cooling the reaction product to room temperature to obtain a light yellow columnar crystal, washing the columnar crystal with distilled water, and naturally drying the columnar crystal toobtain the Eu-MOF complex with the structural formula of [Eu(L)2(2H2O)].4H2O. The rare earth Eu-MOF complex synthesized in the invention has a rapid adsorption capability on Congo red dye in wastewater; and the framework of the MOF complex adsorbed with dye molecules is kept intact, so that the MOF complex is repeatedly used for treating the dye wastewater, thereby the treatment cost of the dye wastewater is reduced, and the pollution of dye wastes to the environment is reduced.

Description

technical field [0001] The invention relates to a rare earth MOF complex, in particular to an Eu-MOF complex and a synthesis method thereof, and also relates to the use of the Eu-MOF complex as a dye adsorbent in the treatment of dye wastewater. Background technique [0002] Based on dye wastewater with deep color, high content of organic pollutants, diverse components, heavy metals and biological toxicity, and refractory biodegradation, dyes have strong resistance to photolysis and oxidation, and contain a variety of biological toxicity or cause "three causes" (carcinogenic , teratogenic, mutagenic) properties of organic substances, the harm to environmental pollution is extremely great. As we all know, the methods for removing dyes from industrial wastewater include biodegradation, electrochemical destruction, precipitation, photocatalytic degradation, and physical adsorption. Among them, adsorption is a more efficient, low-cost, by-product-free, and environmentally friend...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30
CPCB01J20/226C02F1/285C02F2101/308
Inventor 杨云霞张海霞
Owner NORTHWEST NORMAL UNIVERSITY
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