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Sol-gel preparation method of porous nickel cobaltate material

A technology of sol-gel and nickel cobaltate, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of expensive, harmful, and non-environmentally friendly organic compounds, and achieve high crystallinity and simple process , the effect of uniform pore size distribution

Inactive Publication Date: 2011-06-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous sol-gel methods for preparing nickel cobaltate, most methods use high-molecular organics as ligands for metal ions and organics as solvents, but high-molecular organics are expensive, not environmentally friendly, and many organics are harmful to the human body.

Method used

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  • Sol-gel preparation method of porous nickel cobaltate material
  • Sol-gel preparation method of porous nickel cobaltate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The sol-gel preparation method of the porous nickel cobaltate material of the present embodiment operates according to the following steps:

[0023] Mix 50mL of cobalt acetate solution with a concentration of 0.32mol / L and 50mL of nickel acetate solution with a concentration of 0.16mol / L to form an aqueous solution of acetate, and then add 50mL of lemon with a concentration of 0.48mol / L to the aqueous solution of acetate Aqueous acid solution, dilute with distilled water so that the molar concentration of cobalt acetate in the mixed solution is 0.016mol / L, stir and mix evenly, place in a drying oven, dry at 120°C for 16 hours to obtain a precursor, and grind the obtained precursor Crush and pass through a 200-mesh sieve, and place it in a tube furnace for calcination at 400°C for 2 hours to obtain a porous nickel cobalt oxide material.

Embodiment 2

[0025] The sol-gel preparation method of the porous nickel cobaltate material of the present embodiment operates according to the following steps:

[0026] Mix 50mL of cobalt acetate solution with a concentration of 0.32mol / L and 50mL of nickel acetate solution with a concentration of 0.16mol / L to form an aqueous solution of acetate, and then add 50mL of lemon with a concentration of 0.48mol / L to the aqueous solution of acetate Aqueous acid solution, dilute with distilled water so that the molar concentration of cobalt acetate in the mixed solution is 0.016mol / L, stir and mix evenly, place in a drying oven, dry at 130°C for 12 hours to obtain a precursor, and grind the obtained precursor Crush and pass through a 200-mesh sieve, and calcinate at 350°C for 3 hours in a tube furnace to obtain a porous nickel cobaltate material.

Embodiment 3

[0028] The sol-gel preparation method of the porous nickel cobaltate material of the present embodiment operates according to the following steps:

[0029] Mix 50mL of cobalt acetate solution with a concentration of 0.32mol / L and 50mL of nickel acetate solution with a concentration of 0.16mol / L to form an aqueous solution of acetate, and then add 50mL of lemon with a concentration of 0.48mol / L to the aqueous solution of acetate Aqueous acid solution, dilute with distilled water so that the molar concentration of cobalt acetate in the mixed solution is 0.03mol / L, stir and mix evenly, place in a drying oven, dry at 125°C for 14 hours to obtain a precursor, and grind the obtained precursor Crush and pass through a 200-mesh sieve, and place it in a tube furnace for calcination at 380°C for 2 hours to obtain a porous nickel cobaltate material.

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Abstract

The invention discloses a sol-gel preparation method of a porous nickel cobaltate material. The method comprises the following steps of: dissolving cobalt acetate and nickel acetate in distilled water to obtain acetate aqueous solution, adding citric acid aqueous solution, uniformly mixing, adding distilled water for diluting until the concentration of the cobalt acetate is between 0.016 and 0.05 mol / L to obtain diluted solution, and drying to obtain a precursor; and grinding and calcining the precursor to obtain the porous nickel cobaltate material. The method has a simple preparation process and is environmentally-friendly; and the obtained nickel cobaltate has a spinel cubic phase, high purity, high degree of crystallinity, uniform pore diameter distribution and the pore diameter size of less than 200 nanometers, and is porous.

Description

1. Technical field [0001] The invention relates to a preparation method of an inorganic porous material, in particular to a sol-gel preparation method of a porous nickel cobaltate material. 2. Background technology [0002] NiCo 2 o 4 It is a spinel-type composite oxide. Recent studies have found that nickel cobaltate has good applications in many aspects and is an important inorganic functional material. For example, nickel cobaltate is a good electrode material in alkaline electrolyte, can be used as the active electrode of electrochemical capacitor, and shows good catalytic activity for some substances. Someone discovered NiCo 2 o 4 to H 2 o 2 Electrochemical reduction has high catalytic activity and stability, and has high catalytic activity for oxygen precipitation in the petroleum industry. Nickel cobalt oxide also exhibits excellent magnetic properties after research. [0003] At present, there are few studies on the preparation method of nickel cobaltate, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
Inventor 陈祥迎吴烨钦计娉婷周青青
Owner HEFEI UNIV OF TECH
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