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Method for preparing ZnO nano rod

A technology of nanorods and zinc nitrate hexahydrate, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of complex process, expensive equipment and instruments, poor repeatability, etc., achieve simple process equipment, reduce preparation cost, The effect of a short reaction cycle

Inactive Publication Date: 2008-05-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods either have high requirements on equipment, and the equipment and instruments are relatively expensive; or the utilization rate of raw materials is very small; or the process is complex, the preparation cycle is long, and the repeatability is poor.

Method used

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  • Method for preparing ZnO nano rod

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Embodiment 1

[0013] Embodiment 1, at first analytically pure zinc nitrate hexahydrate (Zn(NO 3 ) 3 ·6H 2 O) add in distilled water, stir, be mixed with Zn 2+ Concentration is the zinc nitrate transparent solution of 0.6mol / L; Add analytically pure sodium hydroxide (NaOH) in the zinc nitrate transparent solution, make the molar concentration ratio in the solution be Zn 2+ / OH - = 1:2, and keep stirring to form a precursor solution; pour the precursor solution prepared above into the hydrothermal reaction kettle, and the filling degree is controlled at 70%; then seal the hydrothermal reaction kettle and put it into MDS-6 Type temperature and pressure double control microwave hydrothermal reactor; select the temperature control mode to react, the hydrothermal temperature is controlled at 160 ° C, the reaction time is controlled at 20 minutes, and the reaction is naturally cooled to room temperature after the reaction is completed; the hydrothermal reaction kettle is opened, and the product...

Embodiment 2

[0015] Embodiment 2, at first analytically pure zinc nitrate hexahydrate (Zn(NO 3 ) 3 ·6H 2 O) add in distilled water, stir, be mixed with Zn 2+ Concentration is the zinc nitrate transparent solution of 0.8mol / L; Add analytically pure urea (CO(NH 2 ) 2 ), so that the molar concentration ratio in the solution is Zn 2+ / urea=1:2, and keep stirring to form a precursor solution; pour the precursor solution prepared above into the hydrothermal reaction kettle, and the filling degree is controlled at 60%; then seal the hydrothermal reaction kettle and put it into the MDS -6 type temperature-pressure dual-control microwave hydrothermal reactor; choose the temperature control mode to react, the hydrothermal temperature is controlled at 180°C, the reaction time is controlled at 10min, and naturally cool to room temperature after the reaction; open the hydrothermal reaction kettle, the product Collected by filtration, then washed several times with deionized water and anhydrous iso...

Embodiment 3

[0016] Embodiment 3, at first analytically pure zinc nitrate hexahydrate (Zn(NO 3 ) 3 ·6H 2 O) add in distilled water, stir, be mixed with Zn 2+ Concentration is the zinc nitrate transparent solution of 1.0mol / L; Add analytically pure sodium hydroxide (NaOH) in the zinc nitrate transparent solution, make the molar concentration ratio in the solution be Zn 2+ / OH - = 1:2, and keep stirring to form a precursor solution; pour the precursor solution prepared above into the hydrothermal reaction kettle, and the filling degree is controlled at 80%; then seal the hydrothermal reaction kettle and put it into MDS-6 Type temperature-pressure double-control microwave hydrothermal reactor; select the temperature control mode to react, the hydrothermal temperature is controlled at 100 ° C, the reaction time is controlled at 60 minutes, and the reaction is naturally cooled to room temperature after the reaction is completed; the hydrothermal reaction kettle is opened, and the product is ...

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Abstract

A preparation method of ZnO nanorods, at first adding analytically pure zinc nitrate hexahydrate into distilled water to make a zinc nitrate transparent solution; adding sodium hydroxide or urea to the zinc nitrate transparent solution to form a precursor solution; pouring the precursor solution Put it into the hydrothermal reaction kettle, then seal the hydrothermal reaction kettle, put it into the temperature-pressure dual-control microwave hydrothermal reaction instrument; after the reaction is completed, cool it down to room temperature naturally; open the hydrothermal reaction kettle, the product is collected by filtration, and then separately Washing several times with deionized water, absolute ethanol or isopropanol, and drying to obtain the final ZnO nanorods. The invention adopts the microwave hydrothermal method without post-processing, and the process equipment is simple, and the obtained nanorods have a narrow diameter distribution of about 20nm-50nm, and the ZnO nanorods with a length ranging from tens of nanometers to hundreds of nanometers have a short reaction period and can be repeated. Sex is well prepared. The method not only greatly reduces the preparation cost, but also has simple operation, short reaction cycle and good repeatability.

Description

technical field [0001] The invention relates to a preparation method of ZnO, in particular to a preparation method of ZnO nanorods. Background technique [0002] Zinc oxide (ZnO) has a wide band gap (3.37eV) and a large exciton binding energy (60eV), and is a unique material that possesses both semiconducting and piezoelectric characteristics and various properties resulting therefrom. It has attracted worldwide research interest due to its potential as the most promising candidate material for short-wavelength luminescence, transparent conductors, piezoelectric materials, and room-temperature ultraviolet laser applications. So far, ZnO nanowires, nanorods, nanocombs, nanobelts, nanorings, nanohelices / nanosprings, nanospheres, nanoflowers and nanocages have been successfully synthesized under special growth conditions. These unique nanostructures irrefutably illustrate that among all materials, ZnO may be the material with the most abundant structure and properties in the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82B3/00
Inventor 黄剑锋夏昌奎曹丽云吴建鹏贺海燕
Owner SHAANXI UNIV OF SCI & TECH
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