Method for preparing Ni-MOF adsorbing material by ultrasonic assisted solvent-thermal method and application of Ni-MOF adsorbing material

An auxiliary solvent and adsorption material technology, which is applied in the field of preparation of heavy metal ion treatment agents, can solve the problems of limiting the application of MOF materials and poor water quality

Active Publication Date: 2018-12-14
HEFEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The IRMOF series was designed and synthesized by the Yaghi research group in the United States. On this basis, the Yaghi research group carried out pore chemical modification and po

Method used

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  • Method for preparing Ni-MOF adsorbing material by ultrasonic assisted solvent-thermal method and application of Ni-MOF adsorbing material
  • Method for preparing Ni-MOF adsorbing material by ultrasonic assisted solvent-thermal method and application of Ni-MOF adsorbing material
  • Method for preparing Ni-MOF adsorbing material by ultrasonic assisted solvent-thermal method and application of Ni-MOF adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing Ni-MOF adsorption material by ultrasonic-assisted solvothermal method, the steps are as follows:

[0026] ① First measure 20ml of DMF and 10ml of EtOH as solvent;

[0027] ②Weigh 1-4g of terephthalic acid as organic ligand, 1.74g of Ni(NO 3 ) 2 ·6H 2 O as a coordinated metal ion;

[0028] ③ Add 1ml of acetic acid and 0.01g of benzoic acid as molecular size regulators to synthesize Ni-MOF with smaller size;

[0029] ④ After adding all the medicines, stir them with a magnetic stirrer until they are completely dissolved, and then place them in an ultrasonic instrument for 80 minutes to disperse the medicines evenly and promote crystallization;

[0030] ⑤ Finally, pour the mixed solution into a polytetrafluoroethylene-lined reaction kettle, and react in a constant temperature drying oven at 160°C for 24 hours;

[0031] ⑥ After the reaction is finished and cooled to room temperature naturally, wash 3 times with water, 3 times with ethanol, and 1 t...

Embodiment 2

[0035] Structural characterization of Ni-MOF adsorption materials

[0036] 1. XRD analysis

[0037] figure 1 It is the XRD patterns of different ratios of Ni-MOF synthesized by solvothermal method (b is a partial cut-off curve in a). From figure 1 It can be seen from the figure that the diffraction peak positions of samples synthesized with different ratios are all at 2θ=8°, and there are fewer miscellaneous peaks, and the ratios are 1:1, 1:2, 1:3, 1:4, indicating that the four samples have a similar crystal structure, but consist of figure 1 It can be seen that when Ni 2+ The peak that appears when the ratio with terephthalic acid is 1:2 is the most significant.

[0038] 2. SEM analysis

[0039] figure 2 SEM images of different proportions of Ni-MOF synthesized by solvothermal method, figure 2 a, c, e, g represent Ni(NO 3 ) 2 ·6H 2 The molar ratio of O to terephthalic acid is 1:1, 1:2, 1:3, 1:4, respectively, figure 2 b, d, f, h are respectively figure 2 High...

Embodiment 3

[0046] Performance test of Ni-MOF adsorption material

[0047] The Ni-MOF samples synthesized in Example 1 (1:2 ratio) were added to the Cu-containing 2+ and Pt 2+ After 12 hours, the precipitate was suction filtered, washed and dried before testing. The element content in each sample was obtained by emax energy spectrum analysis method, Figure 5 is the emax energy spectrum in the sample before adsorption, Figure 6 a, b are the adsorbed Cu 2+ After the emax energy spectrum and element content table, Figure 7 a, b are adsorbed Pt 2+ After comparing the emax energy spectrum and element content table, it is found that Ni-MOF has a good effect on Cu 2+ and Pt 2+ have a certain degree of adsorption. Among them, for Cu 2+ The adsorption is more obvious.

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Abstract

The invention discloses a method for preparing a Ni-MOF adsorbing material by an ultrasonic assisted solvent-thermal method and an application of the Ni-MOF adsorbing material, and relates to the technical field of preparation of heavy metal ion treatment agents. The method comprises the steps: firstly, measuring DMF and EtOH as solvents, weighing terephthalic acid as an organic ligand, and takingNi(NO3)2.6H2O as coordination metal ions; adding acetic acid and benzoic acid as molecular size regulators; stirring with a magnetic stirrer to completely dissolve, then putting in an ultrasonic instrument, carrying out ultrasonic treatment, and making the drugs dispersed evenly and promoting crystallization; finally, pouring the mixed liquid into a reaction kettle with a polytetrafluoroethyleneinner liner, and carrying out a reaction; and washing to remove unreacted drugs after the reaction is finished. The influence of Ni-MOF synthesized in different proportions between Ni<2+> and the organic ligand terephthalic acid on the removal performance of heavy metal ions is mainly studied. In a water environment, the performance of the Ni-MOF material is not destroyed, and heavy metal ions inwater can be effectively separated.

Description

technical field [0001] The invention relates to the technical field of preparation of a heavy metal ion treatment agent, in particular to a method and application of an ultrasonic-assisted solvothermal method for preparing a Ni-MOF adsorption material. Background technique [0002] With the rapid development of global industrialization, more and more people are aware of the harm of environmental pollution to life. In the past ten years, heavy metal pollution in water has seriously affected the quality of life of the people. The incidence of cancer in various regions has increased significantly, which has caused a certain degree of panic to people. It is urgent to solve this problem as soon as possible through scientific and technological means. This has prompted researchers to pay great attention to it. However, the current air pollution is also quite serious, and there are varying degrees of smog in major cities. To a large extent, this is inseparable from the waste gas ge...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/0296B01J20/226B01J20/3078C02F1/285C02F2101/20
Inventor 阳杰左秀秀孙芹英张霞查骏徽许梦琪张辉王明华彭恒星吴梦莲李东陆井王敬泽
Owner HEFEI UNIV
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