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Method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser

A layered bimetallic and hydroxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of increasing catalyst cost, weakening LDHs catalytic activity and Stability and other issues, to achieve the effect of easy control, convenient operation and simple process

Inactive Publication Date: 2017-06-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of NiFe LDHs and carbon materials has become the mainstream method to improve the catalytic performance, but under these conditions, the sacrificial metal ions will be reduced accordingly, forming metal deposition on the surface of LDHs, thus weakening the catalytic activity and stability of LDHs, while greatly increasing the catalytic performance. cost

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  • Method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser
  • Method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser
  • Method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser

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Embodiment 1

[0026] This embodiment provides a method for synthesizing nickel and nickel-iron layered double hydroxide composites by nanosecond laser ablation in liquid phase, comprising the following steps:

[0027] (1) Using the bulk nickel-iron alloy target as the raw material, the surface of the alloy target was polished with sandpaper and then ultrasonically cleaned with dilute hydrochloric acid to remove the oxide layer; then the surface of the alloy target was cleaned several times with deionized water to remove residual dilute hydrochloric acid, and then Dry the surface of the alloy target for use. Among them, the purity of the bulk nickel-iron alloy target is 99.9%.

[0028] (2) Put the dried alloy target in a 50 ml beaker, add 20 ml of 0.75M urea solution into the beaker, so that the height of the liquid surface above the alloy target is 1-1.5 cm.

[0029] (3) Start the nanosecond laser, adopt the nanosecond pulse laser of 1064 nanometer wavelength to ablate the alloy target in ...

Embodiment 2

[0036] This embodiment provides a method for synthesizing nickel and nickel-iron layered double hydroxide composites by nanosecond laser ablation in liquid phase, comprising the following steps:

[0037] (1) Using the bulk nickel-iron alloy target as the raw material, the surface of the alloy target was polished with sandpaper and then ultrasonically cleaned with dilute hydrochloric acid to remove the oxide layer; then the surface of the alloy target was cleaned several times with deionized water to remove residual dilute hydrochloric acid, and then Dry the surface of the alloy target for use. Among them, the purity of the bulk nickel-iron alloy target is 99.9%.

[0038] (2) Put the dried alloy target in a 50 ml beaker, add 20 ml of 1.5M urea solution into the beaker, so that the height of the liquid surface above the alloy target is 1-1.5 cm.

[0039] (3) Start the nanosecond laser, adopt the nanosecond pulse laser of 1064 nanometer wavelength to ablate the alloy target in t...

Embodiment 3

[0046] This embodiment provides a method for synthesizing nickel and nickel-iron layered double hydroxide composites by nanosecond laser ablation in liquid phase, comprising the following steps:

[0047] (1) Using the bulk nickel-iron alloy target as the raw material, the surface of the alloy target was polished with sandpaper and then ultrasonically cleaned with dilute hydrochloric acid to remove the oxide layer; then the surface of the alloy target was cleaned several times with deionized water to remove residual dilute hydrochloric acid, and then Dry the surface of the alloy target for use. Among them, the purity of the bulk nickel-iron alloy target is 99.9%.

[0048] (2) Place the dried alloy target in a 50 ml beaker, and add 20 ml of 6M urea solution into the beaker to make the liquid level above the alloy target 1-1.5 cm.

[0049] (3) Start the nanosecond laser, adopt the nanosecond pulse laser of 1064 nanometer wavelength to ablate the alloy target in the urea solution...

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Abstract

The invention belongs to a method for synthesizing a nano material from top to bottom in a physical mode, and discloses a method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser. The method comprises the following steps of: taking a blocky ferronickel alloy target as a raw material, and grinding and washing the alloy target to remove a surface oxidization layer; putting the blocky ferronickel alloy target into a container, and adding an urea solution into the container until 1-1.5 cm highly above the alloy target; ablating the alloy target for 20-30 minutes through nanosecond-pulse laser liquid phase with wavelength of 1064 nanometers; and finally, taking out a dark brown solution in the container, and performing freeze-drying after centrifuging to obtain a powder composite product. The method is used for ablating the ferronickel alloy target in the urea solution through a nanosecond-pulse laser liquid phase ablating technology to obtain composite of nickel and ferronickel layered double metal hydroxides; the defects of material conductivity are effectively overcome through the synergistic effect of nickel and ferronickel layered double metal hydroxides, and catalytic activity is further greatly improved; and the method is simple in process, is delicate in design, is safe and controllable, and is low in cost.

Description

technical field [0001] The invention belongs to a method for synthesizing nanomaterials from top to bottom in a physical way, in particular to a method for synthesizing layered double metal hydroxides. Background technique [0002] Layered double hydroxides (Layered Doubled Hydroxides, LDHs), also known as hydrotalcite compounds, have been used as excellent materials in recent years because of their unique two-dimensional layered structure and adjustable composition, as well as their low price and rich content. Water oxidation catalysts have been extensively studied by more and more researchers. The two-dimensional layered structure provides it with a larger specific surface area, so more active sites will be exposed; the layered structure is also conducive to the diffusion of gas molecules and the progress of the reaction, see Lu X, Zhao C.et al. Nature communications, 2015, 6. [0003] How to further improve the catalytic activity of LDHs has become a research hotspot. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02B01J23/755B01J35/10B82Y40/00
CPCB82Y40/00B01J23/755B22F9/02B01J35/61
Inventor 杜希文高治文董存库
Owner TIANJIN UNIV
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