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Preparation method for nano nickel oxide

A technology of nano-nickel oxide and nickel salt, applied in nanostructure manufacturing, nickel oxide/nickel hydroxide, nanotechnology, etc., can solve the problems of using surfactants, complex preparation process, high preparation cost, etc., and achieve simple method and easy operation Convenience and less environmental pollution

Inactive Publication Date: 2011-05-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also has the disadvantages of complex preparation process, need to use surfactant, pollute the environment and high preparation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Measure 150 mL of 1.0 mol / L nickel nitrate solution, and control the solution temperature to 50°C. Another 150 mL of 1.0 mol / L sodium carbonate solution was prepared, added to the above nickel nitrate solution, and mixed and stirred at 50° C. for 0.5 h. Then prepare 300 mL of 1.0 mol / L sodium hydroxide solution, preheat to 50°C and add to the above mixed solution to form nickel hydroxide precipitate. After the addition was complete, the mixture continued to be aged at 50 °C for 4 h with stirring. After aging, the mixture was filtered, washed with deionized water, and dried at 110° C. to obtain nickel hydroxide powder. The above-mentioned nickel hydroxide powder was calcined at 400° C. for 4 hours to obtain a black-green solid powder. X-ray powder diffraction showed that the powder was a pure phase of nickel oxide. According to the broadening of the X-ray diffraction peak, the average grain size of the nickel oxide is calculated by the Scherrer formula to be 15nm, and ...

Embodiment 2

[0030] Take 200mL of 1.0mol / L nickel chloride solution, and adjust the temperature of the solution to 40°C. Add 200 mL of 1.0 mol / L potassium oxalate solution to this nickel chloride solution, and mix and stir at 40° C. for 1 h. Prepare 200 mL of 2.0 mol / L sodium hydroxide solution and preheat it to 40°C, add the sodium hydroxide solution into the above mixed solution, and nickel hydroxide precipitates will form in the solution. The precipitate was further aged at 40 °C for 5 h. After the precipitate was filtered, washed with deionized water, and dried at 110°C, the obtained nickel hydroxide powder was calcined at 450°C for 6 hours to obtain a black-green solid powder. X-ray powder diffraction showed that the powder was a pure phase of nickel oxide. According to the broadening of the X-ray diffraction peak, the average grain size of the nickel oxide is calculated by the Scherrer formula to be 17nm, and the specific surface area of ​​the nickel oxide measured by the nitrogen a...

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Abstract

The invention relates to a preparation method for nano nickel oxide. The method comprises the following steps of: reacting pre-precipitant aqueous solution with nickel salt aqueous solution to obtain pre-precipitated dirty solution; adding precipitant aqueous solution into the pre-precipitated dirty solution for reaction; and filtering, washing, drying and sintering to obtain the nano nickel oxide. The nano nickel oxide is prepared by a pre-precipitation method, and the obtained nickel oxide has small grain size and higher heat resistance.

Description

technical field [0001] The invention relates to a preparation method of nano-nickel oxide. Background technique [0002] Nickel oxide can be used as an adhesive for enamel, a pigment for ceramics and glass, and can also be used in magnetic materials, metallurgy and picture tube industries. Nano-nickel oxide has a large specific surface area and pore volume and a large number of central atoms located in grain boundaries and defects in grains. It is a new type of catalytic material, electrode material, magnetic material and gas-sensing material. [0003] At present, the preparation of nano-nickel oxide materials is mostly achieved by using surfactants, and the preparation process is complicated. For example, CN1887728A discloses a kind of nickel oxide and its preparation method for electrochemical capacitors, which adopts nickel nitrate as nickel source, sodium oxalate and sodium hydroxide as precipitant, Tween-80 as surfactant, through liquid phase Nickel oxide nanoparticle...

Claims

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Application Information

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IPC IPC(8): C01G53/04B82B3/00
Inventor 关莉莉汪颖吴佳舒兴田慕旭宏罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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