Preparation of spherical Ni(OH)2 nano powder

A nano-powder and spherical technology, which is applied in the field of preparation of spherical Ni2 nano-powder, can solve the problems of difficult control of product particle size, difficult industrial production, irregular shape, etc. The effect of product purity

Inactive Publication Date: 2009-06-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of some products of the above methods is not easy to control, the distribution is uneven, and the shape is

Method used

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  • Preparation of spherical Ni(OH)2 nano powder
  • Preparation of spherical Ni(OH)2 nano powder
  • Preparation of spherical Ni(OH)2 nano powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] A spherical Ni(OH) 2 The preparation method of nano powder consists of the following steps:

[0027] (1) Preparation of nickel-loaded organic phase:

[0028] Under magnetic stirring, add naphthenic acid with an average molecular weight of 200-350, isooctyl alcohol and 1.0 mol·L in a volume ratio of 2:1:3 in an Erlenmeyer flask. -1 NiSO 4 Aqueous solution, add 1.0mol·L -1 Adjust the pH to 7 with ammonia water, continue to stir for 0.5 hours, pour the mixed solution into a separatory funnel, stand still for 5 minutes, separate the liquids, wash the organic phase with distilled water and then separate the liquid twice, collect the organic phase, which is the nickel-loaded organic phase ;

[0029] (2) Preparation of water phase:

[0030] Add 1.0mol·L to distilled water -1 The pH value of hydrochloric acid is adjusted to 6 to obtain the water phase;

[0031] (3) Hydrothermal back extraction and crystal formation:

[0032] Introduce the water phase and the nick...

Example Embodiment

[0037] Example 2

[0038] A spherical Ni(OH) 2 The preparation method of nano powder consists of the following steps:

[0039] (1) Preparation of nickel-loaded organic phase:

[0040] Same as Example 1;

[0041] (2) Preparation of water phase:

[0042] Use distilled water directly;

[0043] (3) Hydrothermal back extraction and crystal formation:

[0044] Same as Example 1;

[0045] (4) Product processing:

[0046] Same as Example 1;

[0047] (5) Characterization of the product

[0048] The spherical Ni(OH) 2 The measurement result of the nano powder product with an 18KW target X-ray diffractometer (Rigaku Corporation) shows that the product has Ni(OH) 2 Diffraction characteristics. Observe the morphology and particle size of the product under JEM-100C*II transmission electron microscope (JEOL) image 3 , The product is spherical.

Example Embodiment

[0049] Example 3

[0050] A spherical Ni(OH) 2 The preparation method of nano powder consists of the following steps:

[0051] (1) Preparation of nickel-loaded organic phase:

[0052] Same as Example 1;

[0053] (2) Preparation of water phase:

[0054] Add 1.0mol·L to distilled water -1 Adjust the pH of the ammonia water to 8;

[0055] (3) Hydrothermal back extraction and crystal formation:

[0056] Same as Example 1;

[0057] (4) Product processing:

[0058] Same as Example 1;

[0059] (5) Characterization of the product

[0060] The spherical Ni(OH) 2 The measurement result of the nano powder product with an 18KW target X-ray diffractometer (Rigaku Corporation) shows that the product has Ni(OH) 2 Diffraction characteristics. Observe the morphology and particle size of the product under JEM-100C*II transmission electron microscope (JEOL) Figure 4 , The product is spherical.

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Abstract

The invention discloses a method for preparing spherical Ni(OH)2 nano powder, which is characterized by comprising the following steps: (1) uniformly mixing naphthenic acid or bis(2-ethylhexyl)phosphoric acid and isooctyl alcohol with stirring, adding an aqueous solution of NiSO4 into the mixture, adjusting the pH value, transferring the mixed solution into a dispensing device, standing the mixed solution, separating an organic phrase, washing the organic phrase with distilled water and obtaining a nickel loaded organic phrase; (2) adjusting the pH value of the water to 5 to 8 and obtaining a water phrase; (3) introducing the water phrase and the nickel loaded organic phrase into a high-pressure kettle, sealing the kettle and starting stirring and stopping heating and stirring after the reaction goes on for 10 to 300 minutes at 110 to 300 DEGC and 0.05 to 5.8MPa; and (4) naturally cooling the mixed solution to room temperature, separating solid from liquid, washing the solid with absolute ethanol, drying the solid and obtaining the spherical Ni(OH)2 nano powder. The product of the invention is uniform in granularity and regular in shape. The process is simple and low in energy consumption. The product is high in purity. And the extractant can be recycled.

Description

technical field [0001] The invention relates to the field of preparation of inorganic functional materials, in particular to a spherical Ni(OH) 2 Preparation method of nanopowder. Background technique [0002] Nano Ni(OH) 2 than ordinary Ni(OH) 2 The material has more excellent electrocatalytic activity, high discharge platform, high electrochemical capacity and high density. Ni(OH) as battery cathode material 2 It plays an important role in the development of chemical power sources and is widely used in various nickel-cadmium batteries, hydrogen storage batteries, zinc-nickel batteries and iron-nickel batteries. [0003] Currently preparing nano Ni(OH) 2 The main methods are: precipitation transformation method, homogeneous precipitation method, absolute ethanol method, wet chemical synthesis method, coordination precipitation method, ion exchange method, microemulsion method, high energy ball milling method and solid phase reaction method. The particle size of some o...

Claims

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Application Information

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IPC IPC(8): C01G53/04
Inventor 王兴尧王艳明苗翠
Owner TIANJIN UNIV
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