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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 irregular; the preparation process of some is relatively long, and high-temperature calcination and ball milling are required;

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

Embodiment 1

[0026] A spherical Ni(OH) 2 The preparation method of nanopowder is made up of following steps:

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

[0028] Under magnetic stirring, add naphthenic acid with an average molecular weight between 200 and 350, isooctyl alcohol and 1.0 mol·L -1 NiSO 4 aqueous solution, add 1.0mol·L -1 Adjust the pH value with ammonia water to 7, continue to stir for 0.5 hours, pour the mixed solution into the separating funnel, separate the liquid after standing still for 5 minutes, 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 in distilled water -1 The hydrochloric acid adjustment pH value is 6, obtains aqueous phase;

[0031] (3) Hydrothermal stripping and crystal formation:

[0032] The aqueous phase and the nickel-loaded organic phase were introduced into the autoclave...

Embodiment 2

[0038] A spherical Ni(OH) 2 The preparation method of nanopowder is made up of following steps:

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

[0040] With embodiment 1;

[0041] (2) Preparation of water phase:

[0042] Use distilled water directly;

[0043] (3) Hydrothermal stripping and crystal formation:

[0044] With embodiment 1;

[0045] (4) Product handling:

[0046] With embodiment 1;

[0047] (5) Product characterization

[0048] Spherical Ni(OH) 2 Nano powder products are measured by 18KW target X-ray diffractometer (Japan Rigaku Co., Ltd.) and the results show that the product has Ni(OH) 2 diffraction features. Observe the morphology and particle size of the product under a JEM-100C*II transmission electron microscope (Japan Electronics JEOL). image 3 , the product is spherical.

Embodiment 3

[0050] A spherical Ni(OH) 2 The preparation method of nanopowder is made up of following steps:

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

[0052] With embodiment 1;

[0053] (2) Preparation of water phase:

[0054] Add 1.0mol L in distilled water -1 The ammonia water adjusts the pH value to be 8;

[0055] (3) Hydrothermal stripping and crystal formation:

[0056] With embodiment 1;

[0057] (4) Product handling:

[0058] With embodiment 1;

[0059] (5) Product characterization

[0060] Spherical Ni(OH) 2 Nano powder products are measured by 18KW target X-ray diffractometer (Japan Rigaku Co., Ltd.) and the results show that the product has Ni(OH) 2 diffraction features. Observe the morphology and particle size of the product under a JEM-100C*II transmission electron microscope (Japan Electronics 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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