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Preparation method of nickel ion modified covalent organic framework material and application thereof

A technology of covalent organic framework and nickel ions, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, carbon monoxide, etc., can solve the problem of low product selectivity, and achieve simple operation and moderate price , the effect of saving energy consumption

Active Publication Date: 2018-11-13
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These research work in CO 2 Significant progress has been made in molecular activation, photogenerated charge separation and transport, product selectivity, and new catalytic reaction pathways, but the major problem of low product selectivity in the photocatalytic process has not been fundamentally solved.

Method used

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  • Preparation method of nickel ion modified covalent organic framework material and application thereof
  • Preparation method of nickel ion modified covalent organic framework material and application thereof
  • Preparation method of nickel ion modified covalent organic framework material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]5,5'-diamino-2,2'-bipyridine and 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde were synthesized by solvothermal method to Bpy-COF containing bipyridine group, The mass ratio of 5,5'-diamino-2,2'-bipyridine to 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde is 9.3:7, and the process parameters of the solvothermal method are : The reaction temperature is 120°C, and the reaction time is 72h. Then the obtained Bpy-COF and nickel perchlorate were added into 30ml of acetonitrile solvent at a mass ratio of 2:1, stirred at room temperature for 4h, then centrifuged and washed 5 times with a large amount of acetonitrile solvent, and dried in vacuum at 70°C for 12h. The obtained nickel ion-modified covalent organic framework catalyst Ni-Bpy-COF. Such as figure 1 , 2 , 3, and 4 show the XRD pattern of the prepared Ni-Bpy-COF, the structure diagram of Ni-Bpy-COF, the SEM diagram of Ni-Bpy-COF and the FTIR diagram of Ni-Bpy-COF.

Embodiment 2

[0030] 5,5'-diamino-2,2'-bipyridine and 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde were synthesized by solvothermal method to Bpy-COF containing bipyridine group, The mass ratio of 5,5'-diamino-2,2'-bipyridine to 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde is 9.3:7, and the process parameters of the solvothermal method are : The reaction temperature is 120°C, and the reaction time is 120h. Then the obtained Bpy-COF and nickel perchlorate were added into a certain amount of 30ml of acetonitrile solvent at a mass ratio of 1:1, stirred at room temperature for 6 hours, then centrifuged and washed 3 times with a large amount of acetonitrile solvent, and vacuum-dried at 70°C 12h, the obtained nickel ion modified covalent organic framework catalyst Ni-Bpy-COF.

Embodiment 3

[0032] 5,5'-diamino-2,2'-bipyridine and 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde were synthesized by solvothermal method to Bpy-COF containing bipyridine group, The mass ratio of 5,5'-diamino-2,2'-bipyridine to 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde is 9.3:7, and the process parameters of the solvothermal method are : The reaction temperature is 120° C., and the reaction time is 100 h. Then the obtained Bpy-COF and nickel perchlorate were added to a certain amount of 30ml acetonitrile solvent according to the mass ratio of 2:1, stirred at room temperature for 5h, then centrifuged and washed 4 times with a large amount of acetonitrile solvent, and dried in vacuum at 70°C 12h, the obtained nickel ion modified covalent organic framework catalyst Ni-Bpy-COF.

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Abstract

The invention discloses a preparation method of a nickel ion modified covalent organic framework material and an application thereof, and belongs to the field of material preparation and environment.The preparation method includes utilizing 5,5'-diamido-2,2'-bipyridine and 2,4,6-trihydroxy-1,3,5-benzenetrialdehyde to synthesize a covalent organic framework Bpy-COF by Schiff base condensation; conducting nickel ion post modification to obtain the nickel ion modified covalent organic framework material Ni-Bpy-COF. The principle and a method of the coordination chemistry are utilized to combinethe advantages of a metal complex molecular catalyst in high-selectivity photocatalytic conversion of CO2 with COFs having semiconductor properties, and the obtained Ni-Bpy-COF photocatalytic materialexhibits photocatalytic activity and has high efficiency and high selectivity photocatalytic reduction of CO2 to produce CO under visible light, the selectivity to CO2 photocatalytic reduction reaches 94%, and the problem of low selectivity of products in the existing photocatalytic reduction of CO2 of a semiconductor is solved.

Description

technical field [0001] The invention belongs to the field of material preparation and environment, and in particular relates to a preparation method and application of a nickel ion-modified covalent organic framework material. Background technique [0002] In recent years, the world is facing the severe challenges of energy crisis and environmental pollution, and it is urgent to explore a green development path that can achieve economic development and effectively protect the environment. Catalysts and solar energy convert CO 2 Converting to reduced products with high added value is an ideal solution. Photocatalytic technology based on semiconductor materials utilizes solar energy to drive CO with water as hydrogen source 2 The reduction reaction of photons converts and stores photon energy into chemical bond energy, which can not only alleviate environmental problems such as the greenhouse effect, but also get rid of the dependence on traditional fossil energy, and has g...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22C01B32/40
CPCC01B32/40C08G83/008B01J31/2208B01J2531/847B01J35/39
Inventor 于岩李留义钟万福杨鑫怡陈鑫
Owner FUZHOU UNIV
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