Preparation method and application of beta-phase ferronickel hydroxide/carbon nanotube compound with atomic defects

A technology of hydroxide and carbon nanotubes, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low density and large specific surface area, and achieve The effects of reduced production costs, uniform size distribution, and simple experimental techniques

Active Publication Date: 2020-12-08
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a method for preparing a β-phase nickel-iron hydroxide / carbon nanotube composite with atomic defects, which The synthesis process has high safety, simple operation, and the product has the characteristics of magnetic properties, low density, and large specific surface area; the method is cheap and easy to obtain raw materials, convenient synthesis, simple equipment, no pollution in the production process, and can quickly realize scale Chemical production, the material has more defect sites and active centers, and has better electrolytic water oxygen evolution performance

Method used

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  • Preparation method and application of beta-phase ferronickel hydroxide/carbon nanotube compound with atomic defects
  • Preparation method and application of beta-phase ferronickel hydroxide/carbon nanotube compound with atomic defects
  • Preparation method and application of beta-phase ferronickel hydroxide/carbon nanotube compound with atomic defects

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1, Preparation of β-phase nickel-iron hydroxide / carbon nanotube composites with atomic defects

[0023] Weigh 10 mg of carbon dioxide nanotubes in 40 ml of deionized water (N 2 ) in ultrasonic for 30min to disperse, then add 0.0357g (0.0375mol / L) nickel chloride hexahydrate, 0.0299g (0.0375 mol / L) ferrous chloride tetrahydrate, 0.2804g (0.05mol / L) hexamethylene Tetramine and 0.0222g (0.015mol / L) ammonium fluoride were dissolved and transferred to a polytetrafluoroethylene high-temperature autoclave. After reacting at 120°C / 6 h, wait for cooling and wash with deionized water to obtain a black powder . Subsequently, the powder was dispersed in a mixed solution of 50 ml of hydrogen peroxide and water (1:1 by volume) and mechanically stirred for 24 hours, then filtered and washed with deionized water and ethanol, and air-dried at room temperature.

Embodiment 2

[0024] Embodiment 2, preparation of β-phase nickel-iron hydroxide / carbon nanotube composite

[0025] Weigh 10 mg of carbon dioxide nanotubes in 40 ml of deionized water (N 2 ) in ultrasonic for 30min to disperse, then add 0.0357g (0.0375 mol / L) nickel chloride hexahydrate, 0.0299g (0.0375 mol / L) ferrous chloride tetrahydrate, 0.2804g (0.05mol / L) hexamethylene Tetramine and 0.0222g (0.015mol / L) ammonium fluoride were dissolved and transferred to a polytetrafluoroethylene high-temperature autoclave. After reacting at 120°C / 6 h, wait for cooling and wash with deionized water to obtain a black powder .

[0026] Synthesized atomically defective β-phase nickel-iron hydroxide / carbon nanotube composites such as Figure 1-2 As shown, indicating the successful growth of nanosheets on carbon nanotubes, the β-phase nickel iron hydroxide / carbon nanotube composites as image 3 shown.

[0027] The oxygen evolution performance of electrolyzed water is as follows: Figure 4 As shown, the ...

Embodiment 3

[0028] Example 3, Preparation of β-phase nickel-iron hydroxide / carbon nanotube composites with atomic defects

[0029] Weigh 5 mg of carbon dioxide nanotubes in 40 ml of deionized water (N 2) in ultrasonic for 30min to disperse, then add nickel chloride hexahydrate 0.05625mol / L, ferrous chloride tetrahydrate 0.01875mol / L, hexamethylenetetramine 0.03mol / L and ammonium fluoride 0.035mol / L after dissolving It was transferred to a polytetrafluoroethylene high-temperature autoclave, reacted at 120°C for 24 h, and was cooled and washed with deionized water to obtain a black powder. Then the powder was dispersed in a mixed solution of 50 mL of hydrogen peroxide and water (volume ratio 1:1) and mechanically stirred for 36 hours, then deionized water and ethanol were used to filter and wash the β-phase nickel iron with atomic defects air-dried at room temperature Hydroxide / Carbon Nanotube Composite.

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Abstract

The invention discloses a preparation method and application of a beta-phase ferronickel hydroxide/carbon nanotube compound with atomic defects, and the preparation method comprises the following steps: (1) uniformly dispersing carbon oxide nanotubes in deionized water (introduced with nitrogen) by adopting an ultrasonic dispersion technology; (2) adding nickel chloride hexahydrate, ferrous chloride tetrahydrate, hexamethylenetetramine and ammonium fluoride into the solution, transferring into a reaction kettle, and reacting at 120 DEG C for 6 hours to obtain a ferronickel hydroxide/carbon nanotube compound; and (3) dispersing the obtained material in a mixed solution of hydrogen peroxide and water at room temperature to oxidize ferronickel hydroxide/carbon nanotube compounds with different defect degrees for different time. The method has the advantages of cheap and accessible raw materials, convenient synthesis, simple equipment and no pollution in the production process, can quicklyimplement large-scale production, and has the advantages of more defect sites, more active centers and favorable water electrolysis and oxygen evolution properties.

Description

technical field [0001] The invention relates to a preparation technology applicable to transition metal hydroxides, in particular to a preparation method and application thereof for the controllable formation of β-phase nickel-iron hydroxide / carbon nanotube composites with atomic defects. Background technique [0002] The use of traditional fossil fuels (coal, oil, natural gas, etc.) will cause energy depletion, serious environmental problems such as greenhouse effect, acid rain, and destruction of the ozone layer, which seriously affect human survival and development. Therefore, it is necessary to find clean, Sustainable new energy sources replace traditional fossil fuels to meet human needs (Journal of the American Chemical Society 137.10(2015):3638-3648). Hydrogen has the advantages of high energy density, high combustion calorific value, and zero pollution, so it is considered to be one of the best candidates to replace traditional fossil fuels (Nano Research 8.1(2014):2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10C25B11/06C25B1/04
CPCB01J23/755B01J35/0033B01J35/1004C25B11/04C25B1/04Y02E60/36
Inventor 马炜葛佳佳蒋苏毓周科朝
Owner ZHENGZHOU UNIV
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