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Method for preparing NiO nano flowerlike microspheres with surface topography controllable

A technology of surface morphology and nanoflowers, applied in the direction of nanotechnology, nickel oxide/nickel hydroxide, etc., to achieve stable performance, low price, and easy access

Inactive Publication Date: 2011-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the synthesis of NiO nanospheres whose surface morphology can be continuously tuned has not been reported in the literature.

Method used

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  • Method for preparing NiO nano flowerlike microspheres with surface topography controllable
  • Method for preparing NiO nano flowerlike microspheres with surface topography controllable
  • Method for preparing NiO nano flowerlike microspheres with surface topography controllable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Put 30mL ethylene glycol into a 50mL beaker, add 0.6mL polyethylene glycol (PEG-400), and stir magnetically for 2h; add 10mmol nickel nitrate hexahydrate and 1mmol benzoic acid, stir magnetically for 1h; drop Add 0.6 mL of NaOH solution with a concentration of 2 mol / L, and stir magnetically for 0.5 h to form a blue-green transparent mixed solution.

[0033] (2) The above mixed solution was placed in a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, sealed, and heated in an oven for 8 hours; the reaction temperature was 160°C.

[0034] (3) Take out the polytetrafluoroethylene pressure vessel and cool it down to normal temperature. Take out the reaction solution, put it into a 50ml centrifuge tube, separate the precipitation product in the reaction solution by centrifugation, and wash it repeatedly with absolute ethanol and deionized water for 3 times, and place the obtained precipitation product in an oven at 60°C Dry to obtain nickel hydroxide p...

Embodiment 2

[0037] (1) Put 30mL ethylene glycol into a 50mL beaker, add 1.2mL polyethylene glycol (PEG-400), and stir magnetically for 2h; add 6mmol nickel nitrate hexahydrate and 3mmol benzoic acid, stir magnetically for 1h; drop Add 0.9 mL of NaOH solution with a concentration of 2 mol / L, and stir magnetically for 0.5 h to form a blue-green transparent mixed solution.

[0038] (2) The above mixed solution was placed in a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, sealed, and heated in an oven for 10 hours; the reaction temperature was 180°C.

[0039] (3) Take out the polytetrafluoroethylene pressure vessel and cool it down to normal temperature. Take out the reaction solution, put it into a 50ml centrifuge tube, separate the precipitation product in the reaction solution by centrifugation, and wash it repeatedly with absolute ethanol and deionized water for 3 times, and place the obtained precipitation product in an oven at 80°C Dry to obtain nickel hydroxide p...

Embodiment 3

[0042] (1) Put 30mL ethylene glycol into a 50mL beaker, add 1.8mL polyethylene glycol (PEG-400), and stir magnetically for 2h; add 1mmol nickel nitrate hexahydrate and 5mmol benzoic acid, stir magnetically for 1h; drop Add 1.5 mL of NaOH solution with a concentration of 2 mol / L and stir magnetically for 0.5 h to form a blue-green transparent mixed solution.

[0043] (2) The above mixed solution was placed in a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, sealed, and heated and reacted in an oven for 14 hours; the reaction temperature was 220°C.

[0044] (3) Take out the polytetrafluoroethylene pressure vessel and cool it down to normal temperature. Take out the reaction solution, put it into a 50ml centrifuge tube, separate the precipitated product in the reaction solution by centrifugal separation, and wash it repeatedly with absolute ethanol and deionized water for 3 times, and place the obtained precipitated product in an oven at 100°C Dry to obtain ...

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Abstract

The invention discloses a method for preparing NiO nano flowerlike microspheres with surface topography controllable, belonging to the technical field of inorganic nano materials. The method is characterized by preparing the microspheres by a solvothermal method and comprises the following steps: dissolving a surfactant into a glycol solvent, respectively dissolving nickel nitrate and benzoic acid into the prepared solution, and later, adding a 2mol / L NaOH solution to form blue-green transparent mixed solution; putting the mixed solution into a stainless steel reactor with polytetrafluoroethylene lining to react; centrifuging the obtained turbid solution and then drying the obtained precipitate in a drying oven to obtain a nickel hydroxide precursor; and calcining the precursor in a muffle furnace to obtain the target products, namely NiO nano flowerlike microspheres. The microspheres prepared by the method have the characteristics of high specific surface area, multiple pore size distribution and high purity; and the preparation process is simple.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and relates to a method for preparing nickel oxide (NiO) nano flower-like microspheres whose surface morphology and structure can be continuously adjusted. Background technique [0002] Nano-nickel oxide (NiO) is an important P-type semiconductor material. Due to its unique electrical, magnetic and catalytic properties, it is widely used in the field of catalysis, smart windows, fuel cells, magnetic materials, and gas sensors. It is a promising functional material and has become one of the research hotspots in the world. Since these unique properties of nano-NiO are strongly dependent on its morphology and size, the research on the synthesis of nano-NiO with different morphology has attracted great attention of scientific and technological workers. According to literature reports, Gui et al. (J.Phys.Chem.C, 2007, 111, 5622-5627) prepared hexagonal NiO nanosheets by mixing n...

Claims

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Application Information

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IPC IPC(8): C01G53/04B82Y40/00
Inventor 肖君佳陈标华梁鑫
Owner BEIJING UNIV OF CHEM TECH
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