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A kind of water-stable dye adsorbent and preparation method thereof

An adsorbent and water-stabilized technology, which is applied in the field of dye adsorbent preparation, can solve the problems of restricting the development of the dye adsorption field, small pore size, and weak reusability, and achieve the effects of easy implementation, improved adsorption, and novel structure

Inactive Publication Date: 2019-12-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At home and abroad, traditional porous materials such as activated carbon, zeolite, ethylenediamine sporin, and aluminosilicate are usually used as adsorbents. Due to the small pore size and weak reusability, their development in the field of dye adsorption is limited.

Method used

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  • A kind of water-stable dye adsorbent and preparation method thereof
  • A kind of water-stable dye adsorbent and preparation method thereof
  • A kind of water-stable dye adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The organic ligand HBPEA (0.025 mmol) and copper nitrate (0.05 mmol) were mixed uniformly in 2 mL of N,N-dimethylformamide, and then 1 mL of H 2 O, sealed in a vial. Crystals of the metal-organic framework were obtained via thermal reaction at 100° C. for 48 hours. Place the crystal in a beaker, add methanol solution to soak, and replace the methanol solution every three hours for three days, then filter and remove the methanol solution. The crystals were dried in a vacuum drying blower box, the drying temperature was set at 50° C., and the drying time was set at 24 hours.

Embodiment 2

[0025] Mix the organic ligand HBPEA (0.025 mmol) and copper nitrate (0.05 mmol) in 2 mL of N,N-dimethylformamide, and then add 1.5 mL of H 2 O, sealed in a vial. Crystals of the metal-organic framework were obtained via thermal reaction at 100° C. for 48 hours. Place the crystal in a beaker, add methanol solution to soak, and replace the methanol solution every three hours for three days, then filter and remove the methanol solution. The crystals were dried in a vacuum drying blower box, the drying temperature was set at 50° C., and the drying time was set at 28 h.

Embodiment 3

[0027] The organic ligand HBPEA (0.035 mmol) and copper nitrate (0.05 mmol) were mixed uniformly in 2.0 mL of N,N-dimethylformamide, and then 2 mL of H 2 O, sealed in a vial. Crystals of the metal-organic framework were obtained via thermal reaction at 100° C. for 48 hours. Place the crystal in a beaker, add methanol solution to soak, and replace the methanol solution every three hours for three days, then filter and remove the methanol solution. The crystals were dried in a vacuum drying blower box, the drying temperature was set at 50° C., and the drying time was set at 30 h.

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Abstract

The invention belongs to the technical field of preparation of dye adsorbents, and particularly relates to a water stable dye adsorbent and a preparation method. Under sealing conditions, in a mixed solution of DMF and H2O, an organic ligand biphenyl-3,4,5,3',5'-pentaocarboxylate and copper nitrate Cu(NO3)2.3H2O are subjected to thermal reaction to obtain metal-organic framework crystal; and the obtained blue flaky crystal is placed into a methanol solution to be immersed and replaced, and after the methanol solution is removed by filtration, the crystal is placed in a vacuum drying air blower for drying. Metal-organic framework functional groups of the water stable dye adsorbent provided by the invention contains uncoordinated carboxylic acid groups and are bonded with dyes by ion exchange, hydrogen-bond interaction, Van der Waal's force, electrostatic attraction and hydrophilic interaction to achieve the purposes of adsorption and removal, so that the adsorption of metal-organic frameworks for cationic dyes such as methylene blue can be improved, and the selectivity of the metal-organic frameworks for the dyes can be improved simultaneously.

Description

technical field [0001] The invention belongs to the technical field of dye adsorbent preparation, and in particular relates to a water-stable dye adsorbent and a preparation method. Background technique [0002] With economic development, various dyes are widely used in industry, and my country has become the largest dye consumer in the world. Dyes are discharged into environmental waters during production and use, which will cause serious pollution to the environment, and because most dyes and dye intermediates have carcinogenic, teratogenic, and mutagenic effects, they are highly toxic and difficult to degrade. Very big. According to the regulations of the national environmental department, industrial waste liquid must undergo strict treatment before it can be discharged, especially the dye molecules in the waste liquid need to be removed. [0003] Currently, several methods have been developed to remove organic dyes from water, including photodegradation, extraction, bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C07F1/08C02F101/30
CPCB01J20/226C02F1/285C02F2101/308C07B2200/13C07F1/005
Inventor 孙雯夏昌坤姜德立王方平
Owner JIANGSU UNIV
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