Zinc and copper bi-metal organic framework material and preparation method and application thereof

An organic framework and bimetallic technology, applied in the field of zinc-copper bimetallic organic framework materials and their preparation, can solve the problems of easy agglomeration, poor adsorption performance, poor water stability, etc. The effect of high adsorption capacity

Inactive Publication Date: 2016-02-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, Cu 3 (BTC) 2 It is a kind of MOFs material with high specific surface, but its water stability is not good, it is easy to agglomerate in the water phase, and the adso...

Method used

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  • Zinc and copper bi-metal organic framework material and preparation method and application thereof
  • Zinc and copper bi-metal organic framework material and preparation method and application thereof
  • Zinc and copper bi-metal organic framework material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Comparative Example

[0028] Dissolve 0.88g copper nitrate and 0.420g trimellitic acid into 45ml of a 1:1:1 mixture of deionized N,N′-dimethylformamide, water and ethanol, stir uniformly and ultrasonically process to obtain The reaction solution was raised from room temperature to 120°C at a rate of 5°C / min, kept at a constant temperature for 24h, and cooled to room temperature naturally. The product after suction filtration was first washed with N,N'-dimethylformamide for 3 times, then immersed in ethanol for 3 days, and then activated under vacuum at 120°C for 12 hours, marking this sample as Cu-BTC.

Embodiment 2

[0029] Example 2: Preparation of zinc-copper bimetallic organic framework material

[0030] Dissolve 0.90g copper nitrate, 0.124g zinc nitrate and 0.50g trimesic acid into 22.5ml of a 1:1:1 mixed solution of N,N′-dimethylformamide, deionized water and ethanol. After stirring and ultrasonic treatment, the obtained reaction solution was raised from room temperature to 85°C at a rate of 10°C / min, kept at a constant temperature for 20 hours, and naturally cooled to room temperature. The product after suction filtration was first washed with N,N'-dimethylformamide for 3 times, then immersed in ethanol for 3 days, and then activated under vacuum at 100°C for 13 hours, marking this sample as Zn10 / Cu-BTC.

Embodiment 3

[0031] Example 3: Preparation of zinc-copper bimetallic organic framework material

[0032] Dissolve 0.694g copper nitrate, 0.14g zinc nitrate and 0.420g trimellitic acid in 22.5ml of a 1:1:1 mixture of N,N′-dimethylformamide, deionized water and ethanol. After stirring and ultrasonic treatment, the obtained reaction solution was raised from room temperature to 125°C at a speed of 7°C / min, kept at a constant temperature for 12 hours, and naturally cooled to room temperature. The product after suction filtration was first washed with N,N'-dimethylformamide for 3 times, and then immersed in ethanol for 3 days, and then activated under vacuum at 110°C for 14 hours, marking this sample as Zn20 / Cu-BTC.

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Abstract

The invention belongs to the technical field of metal organic framework materials, and discloses a zinc and copper bi-metal organic framework material and a preparation method and application thereof. The preparation method comprises the steps that 1, soluble copper salt, soluble zinc salt and trimesic acid are added to mixed solvent of N,N'-dimethyl formamide, water and ethyl alcohol, even stirring and ultrasonic treatment are conducted, and reaction liquid is obtained; 2, the reaction liquid obtained in the first step is transferred into a polytef reaction kettle for a hydrothermal reaction, and a roughly prepared zinc and copper bi-metal organic framework material is obtained; 3, the material obtained in the second step is washed through the N,N'-dimethyl formamide firstly and then soaked through ethyl alcohol solvent, and the purified zinc and copper bi-metal organic framework material is obtained after activation is conducted. According to the zinc and copper bi-metal organic framework material, the framework structure of an original copper-based organic material is reserved; meanwhile, the prepared material is large in specific surface and developed in micro-pore structure and has higher adsorption capacity to low-concentration congo red dye molecules in water.

Description

Technical field [0001] The invention relates to a dye molecule Congo red adsorption material in water, in particular to a zinc-copper bimetallic organic framework material and a preparation method thereof. Background technique [0002] The continuous development of society has promoted the development of the chemical industry, but in the process of development, industrial wastewater is also increasing, and dye wastewater is one of the main harmful industrial wastewater. Dyes play a very important role in people's daily life and are widely used in various industries such as printing and dyeing, papermaking, paint, and wood preservatives. It is estimated that in some developing countries, the amount of wastewater discharged by the textile industry is more than one billion tons per year. High-chroma dye wastewater seriously affects water quality, and will have toxic effects and even "three causes" effects on organisms. In view of the toxicity of dye molecules, their complex struct...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30
Inventor 程建华范笑笑杨草梁小燕
Owner SOUTH CHINA UNIV OF TECH
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