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Preparation method of nickel oxide nano flake with uniform and mesoporous structure

A nanosheet, nickel oxide technology, applied in nanostructure manufacturing, nickel oxide/nickel hydroxide, nanotechnology, etc., to achieve uniform distribution of holes, low equipment requirements, and stable performance.

Inactive Publication Date: 2010-05-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the synthesis of nano-NiO with uniform and mesoporous structure has not been reported in the literature

Method used

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  • Preparation method of nickel oxide nano flake with uniform and mesoporous structure
  • Preparation method of nickel oxide nano flake with uniform and mesoporous structure
  • Preparation method of nickel oxide nano flake with uniform and mesoporous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Put 80mL, 0.05mol / L aqueous solution of nickel chloride hexahydrate into a 100mL beaker, add 0.5g cetyl ammonium bromide (CTAB), and stir magnetically for 3 hours; add 0.8mL ammonia water dropwise , magnetically stirred for 2 hours to form a light green transparent mixed solution;

[0033] (2) Place the mixed solution obtained in step (1) in a polytetrafluoroethylene-lined stainless steel reactor, seal it, and heat it in a muffle furnace for 15 hours; the reaction temperature is 150°C;

[0034] (3) filtering, washing and drying the turbid solution obtained in step (2) to obtain a nickel hydroxide precursor;

[0035] (4) The nickel hydroxide precursor obtained in step (3) was calcined at 500 °C for 2 h to obtain uniform and mesoporous NiO nanoflakes. figure 2 The X-ray diffraction pattern of NiO nanoflakes with mesoporous structure, all the diffraction peaks correspond to the cubic phase NiO, and the diffraction peak intensity is high and sharp, indicating that the...

Embodiment 2

[0037] (1) Put 80mL, 0.75mol / L aqueous solution of nickel chloride hexahydrate into a 100mL beaker, add 0.5g polyvinylpyrrolidone (PVP), and stir magnetically for 3 hours; add 0.8mL ammonia water dropwise, and stir magnetically for 2h , forming a light green transparent mixed solution;

[0038] (2) Place the mixed solution obtained in step (1) in a polytetrafluoroethylene-lined stainless steel reactor, seal it, and heat it in a muffle furnace for 18 hours; the reaction temperature is 120°C;

[0039] (3) filtering, washing and drying the turbid solution obtained in step (2) to obtain a nickel hydroxide precursor;

[0040] (4) Calcining the nickel hydroxide precursor obtained in step (3) at 400° C. for 3 h to obtain NiO nanoflakes with uniform and mesoporous structure. image 3 The scanning electron microscope spectrum of NiO nanosheets with mesoporous structure, the mesopore distribution of NiO nanosheets is uniform, and the diameter of the holes is 30-40nm; the diameter of Ni...

Embodiment 3

[0042] (1) Put 80mL, 0.15mol / L aqueous solution of nickel nitrate hexahydrate into a 100mL beaker, add 0.7g of polyvinylpyrrolidone (PVP), and stir magnetically for 3h; add 1.0mL ammonia water dropwise, stir magnetically for 2h, Form a light green transparent mixed solution;

[0043] (2) Place the mixed solution obtained in step (1) in a polytetrafluoroethylene-lined stainless steel reactor, seal it, and heat it in a muffle furnace for 20 hours; the reaction temperature is 80°C;

[0044] (3) filtering, washing and drying the turbid solution obtained in step (2) to obtain a nickel hydroxide precursor;

[0045] (4) Calcining the nickel hydroxide precursor obtained in step (3) at 350° C. for 4 h to obtain NiO nanoflakes with uniform and mesoporous structure.

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Abstract

The invention provides a preparation method of nickel oxide nano flake with uniform and mesoporous structure, which is implemented by (1) putting 0.05-0.15mol / L of aqueous inorganic salt solution containing nickel in a beaker, adding in surfactant with concentration being 5-10g / L, and performing magnetic stirring for 3h; dripping in ammonia water with the volume ratio of ammonia water to aqueous inorganic salt solution containing nickel being 0.01:1-0.015:1, and performing magnetic stirring for 3h; (2) placing the mixed solution obtained in step (1) in a stainless reaction kettle lined by polytetrafluoroethylene to be sealed, and heating for reaction in a muffle furnace for 12-20h with reaction temperature being 80-150 DEG C; (3) filtering, washing and drying the obtained nepheloid solution to obtain nickelhydroxide primer; (4) calcinating the nickelhydroxide primer obtained in step (3) at 350-500 DEG C for 2-4h to obtain porous structural nickel oxide nano flake. The inventive NiO nano flake has pore diameter of 30-40nm, diameter of 300-400nm, belongs to cubic system, high purity, and good quality.

Description

Technical field: [0001] The invention relates to a method for preparing inorganic nanometer materials, in particular to a method for preparing nickel oxide (NiO) nanosheets with uniform and mesopore structure. Background technique: [0002] Nano-nickel oxide (NiO) is an important semiconductor material, which is mainly used in the industry to produce battery electrodes, catalysts, magnetic materials, semiconductors (such as varistors, thermistors), nickel-zinc ferrite, fuel-sensitized solar energy Battery, etc., has become one of the research hotspots in the world. Since these unique properties of nano-NiO are strongly dependent on their morphology and size, the synthesis of nano-NiO with different morphological structures has aroused great interest of researchers. According to literature reports, Han et al. (Powder Technology, 2004, 147, 113-116) prepared NiO nanoparticles by the water-oil microcellular method. Wu et al. (J. Materials Letters, 2007, 61-3174-3178) prepared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04B82B3/00
Inventor 王聪崔银芳吴素娟
Owner BEIHANG UNIV
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