Preparation method of nanoflower-shaped zinc oxide

A flower-shaped zinc oxide and nano-technology, applied in the field of nano-materials, can solve the problems of poor shape integrity, cumbersome operation, and low controllability of nano-flower-shaped zinc oxide, and achieve simple and fast reaction routes, easy-to-obtain raw materials, and rich effect

Inactive Publication Date: 2015-03-25
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned production method is cumbersome to operate, low in controllability, high in cost, and easily pollutes the final product; the nano-flower-shaped zinc oxide produced has poor morphology integrity, uneven particle size, and low purity, which hinders flower-shaped nano-oxidation. Large scale application of zinc

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  • Preparation method of nanoflower-shaped zinc oxide
  • Preparation method of nanoflower-shaped zinc oxide
  • Preparation method of nanoflower-shaped zinc oxide

Examples

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Embodiment 1

[0020] Take 2.7055g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 25ml of deionized water to prepare a 0.37mol / L zinc salt solution. Slowly add the potassium hydroxide solution dropwise into the zinc salt solution until the pH value of the zinc salt solution is 11 to form a reaction solution. Put the reaction solution in the polytetrafluoroethylene lining of the hydrothermal reaction kettle, screw the hydrothermal reaction kettle tightly, and place it in an oven. The temperature of the oven was raised to 200°C at a rate of 10°C / min. After a constant temperature reaction for 3 hours, the hydrothermal reactor was taken out and cooled at room temperature. The reaction solution was centrifuged to obtain a white precipitate, which was alternately washed with absolute ethanol and deionized water, and then dried in an oven at 80° C. to obtain ZnO powder with a nano-flower structure.

[0021] Such as figure 1 As shown, the prepared powder is subjected to XRD (X-ray diffraction) testing, a...

Embodiment 2

[0029] Take solid zinc sulfate and add deionized water to dissolve it to prepare a 0.15 mol / L zinc salt solution. Slowly add the sodium hydroxide solution dropwise into the zinc salt solution until the pH value of the zinc salt solution is 12 to form a reaction solution. Put the reaction solution in the polytetrafluoroethylene lining of the hydrothermal reaction kettle, screw the hydrothermal reaction kettle tightly, and place it in an oven. The temperature of the oven was raised to 120°C at a rate of 15°C / min. After a constant temperature reaction for 5 hours, the hydrothermal reactor was taken out and cooled at room temperature. The reaction solution was centrifuged to obtain a white precipitate, which was alternately washed with absolute ethanol and deionized water, and then dried in an oven at 60° C. to obtain ZnO powder with a nano-flower structure. The prepared powder is a flower-like structure composed of petal structures of nano-sheet units, wherein the thickness of t...

Embodiment 3

[0031] Take solid zinc acetate and add deionized water to dissolve, and prepare a 0.3mol / L zinc salt solution. Slowly add the potassium hydroxide solution dropwise into the zinc salt solution until the pH value of the zinc salt solution is 11 to form a reaction solution. Put the reaction solution in the polytetrafluoroethylene lining of the hydrothermal reaction kettle, screw the hydrothermal reaction kettle tightly, and place it in an oven. The oven was heated up to 140°C at a rate of 20°C / min, and after 4 hours of constant temperature reaction, the hydrothermal reactor was taken out and cooled at room temperature. The reaction solution was centrifuged to obtain a white precipitate, which was alternately washed with absolute ethanol and deionized water, and then dried in an oven at 70° C. to obtain ZnO powder with a nano-flower structure. The prepared powder is a flower-like structure composed of petal structures of nano-sheet units, wherein the thickness of the nano-sheet p...

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Abstract

The invention discloses a preparation method of nanoflower-shaped zinc oxide. The preparation method specifically comprises the following steps: preparing a zinc salt aqueous solution; dropwise adding an alkaline solution into the zinc salt aqueous solution till the zinc salt aqueous solution is strongly alkaline to form a reaction liquid; putting the reaction liquid into a liner of a hydrothermal reaction kettle; screwing the hydrothermal reaction kettle and putting the kettle into an oven to react; taking out the hydrothermal reaction kettle and cooling at room temperature, centrifugalizing the reaction liquid to obtain a white precipitate and respectively cleaning the white precipitate alternately by using absolute ethyl alcohol and deionized water; and putting the cleaned white precipitate into the oven to be dried at 60-100 DEG C to obtain ZnO powder in a nanoflower-shaped structure, wherein the pedal is a nanosheet which is about 30nm thick. The raw materials are easily available, and the preparation method has the characteristics of simple equipment process, high yield, low preparation cost and the like and is suitable for industrial production on a large scale.

Description

technical field [0001] The invention relates to nanometer material technology, in particular to a preparation method of nanometer flower-shaped zinc oxide. Background technique [0002] Zinc oxide is an important wide-bandgap semiconductor material. Due to its special structure, the material exhibits many special functions in catalysis, optics, magnetism, mechanics, etc., and is widely used in light-emitting diodes, gas sensors, and ultraviolet detection. Devices and other optoelectronic fields. Because its size is between atomic clusters and macroscopic particles, nano-zinc oxide has the volume (small size) effect, surface effect and macroscopic quantum tunneling effect of nanomaterials. It has special functions that ordinary zinc oxide products do not have. In recent years, the research on the preparation, performance and application of ZnO nanomaterials has received extensive attention. Since the structure and morphology of materials are closely related to the properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00
CPCC01G9/02C01P2002/72C01P2004/03C01P2004/50C01P2004/61
Inventor 彭程郭佼佼刘明瑞杨文科
Owner HUAQIAO UNIVERSITY
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