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Preparation method of nickel-cobalt hydroxide with controllable appearance

A nickel-cobalt hydroxide and hydroxide technology, which is applied in the field of preparation of nickel-cobalt hydroxide, can solve the problems of long period, single shape of nickel-cobalt hydroxide, uniform particle size and difficulty in shape control. , to achieve the effect of short process, simple reaction process and mild conditions

Inactive Publication Date: 2011-05-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the morphology of the preparation of nickel-cobalt hydroxide is relatively simple, most of which are spherical, and the preparation process generally takes a long time. Difficulties

Method used

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  • Preparation method of nickel-cobalt hydroxide with controllable appearance
  • Preparation method of nickel-cobalt hydroxide with controllable appearance
  • Preparation method of nickel-cobalt hydroxide with controllable appearance

Examples

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Embodiment example 1

[0024] Prepare 10 ml of a mixed solution of nickel nitrate and cobalt nitrate with a concentration of 0.75 mol / L at room temperature, wherein the molar ratio of nickel ions to cobalt ions is 2:1, add 0.024 mol of ethylenediamine under stirring conditions, continue stirring for 1 h, and then Add 48ml of sodium hydroxide solution with a concentration of 7mol / L, stop stirring after 1h, then control the temperature at 100°C for 1h, filter and wash, then dry at 40°C for 12h to obtain the final product nickel-cobalt hydroxide. Scanned photographs and X-ray diffraction patterns such as figure 1 with figure 2 shown. The structure of the obtained nickel-cobalt hydroxide is a spherical structure, and the basic structural unit is a double-wheel structure. The diameter of the wheels on both sides is 1.5 μm, the thickness is 70 nm, and the length of the middle axis is 50 nm.

Embodiment example 2

[0026] Prepare 10ml concentration of 0.75mol / L nickel nitrate and cobalt nitrate mixed solution at normal temperature, wherein the molar ratio of nickel ion and cobalt ion is 3:1, add 0.012mol triethylenetetramine under stirring condition, continue to stir for 1h, Then add 48ml of sodium hydroxide solution with a concentration of 8mol / L, stop stirring after 1.5h, then control the temperature at 90°C for 1.5h, filter and wash, then dry at 40°C for 12h to obtain the final product nickel-cobalt hydroxide , the scanned photo of the product is as image 3 As shown; the obtained nickel-cobalt hydroxide structure is a spherical structure, and the basic structural unit is a hexagonal disk, the thickness of the hexagonal disk is 100nm, and the side length is 600nm.

Embodiment example 3

[0028] Prepare 10 ml of a mixed solution of 0.8 mol / L nickel nitrate and cobalt nitrate at room temperature, wherein the molar ratio of nickel ions to cobalt ions is 1:3, add 0.012 mol of triethylenetetramine under stirring conditions, and continue stirring for 1 h. Then add 48ml of sodium hydroxide solution with a concentration of 7mol / L, stop stirring after 1.8h, then control the temperature at 110°C for 2h, filter and wash, then dry at 40°C for 12h to obtain the final product nickel-cobalt hydroxide, The scanned photo of the product is as Figure 4 shown. The obtained nickel-cobalt hydroxide structure is a three-dimensional sisal structure, and the basic structural unit is a smooth rod-like structure, wherein the length of the rod is 1.5 μm and the diameter is 400 nm.

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Abstract

The invention discloses a preparation method of nickel-cobalt hydroxide with controllable appearance, belonging to the technical field of chemical engineering and new materials. The preparation method comprises the following steps of: firstly adding an ethylene amine chelating agent into mixed solution of soluble nickel salt and cobalt salt to form metal amine chelating agent solution, fully chelating metal ions and the chelating agent by stirring, then adding alkali metal hydroxide solution into a reaction system, and obtaining hydroxide precipitate by controlling the reaction temperature; and filtering, cleaning and drying the obtained hydroxide precipitate and obtaining the nickel-cobalt hydroxide with a spherical structure or a three-dimensional sisal-shaped structure. The preparation method has the advantages that 1, a new appearance of the nickel-cobalt hydroxide is provided; 2, for the nickel-cobalt hydroxide prepared by using the method provided by the invention, the control for the appearance of the nickel-cobalt hydroxide can be realized by adjusting the molar ratio of nickel ions and cobalt ions in the system, the variety of ethylene amine, the molar ratio of different amines and the dropping sequence; and 3, in the method provided by the invention, the reaction technology is simple, the condition is mild, and the process is short, so that the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of chemical engineering and new materials, in particular to a preparation method of nickel-cobalt hydroxide with controllable morphology. Background technique [0002] Transition metal hydroxides and oxides have important applications in many fields due to their special redox properties and phase structure characteristics. The development of nanoscience has opened up new fields for the research of new materials. Nickel and cobalt hydroxides and oxide nanomaterials in transition metal hydroxides and oxides have interesting magnetic, optical, transport, catalytic, electrochemical and and field emission properties, it has broad application prospects in the fields of magnetism, catalysis, sensing, and energy storage. Morphology has an important impact on performance, and changes in material morphology will cause changes in performance. Therefore, it is particularly important to control the morphology of materials. [0...

Claims

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Application Information

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IPC IPC(8): C01G53/04B82Y40/00
Inventor 王戈杨穆高鸿毅谭丽
Owner UNIV OF SCI & TECH BEIJING
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