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A tetrapod-like nanorod of zinc oxide, its preparation method and apparatus

A tetrapod-shaped zinc oxide and nanorod technology, applied in the field of nanomaterials, can solve the problems of low product purity, high cost, and low steam concentration, and achieve the effects of simple preparation method, reduced material cost, and reduced preparation temperature

Inactive Publication Date: 2006-10-11
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existing preparation methods all use high-purity zinc powder or zinc particles as the zinc source, and the temperature is 800-900°C
Zinc has a fast evaporation rate, a low degree of oxidation (resulting in very low product purity), and is expensive
Although ZnO carbon reduction method can obtain easily controlled Zn vapor, it cannot be used to prepare tetrapod ZnO nanostructures due to the low concentration (partial pressure) of the vapor at the experimental temperature, which cannot achieve high-density nucleation.

Method used

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  • A tetrapod-like nanorod of zinc oxide, its preparation method and apparatus
  • A tetrapod-like nanorod of zinc oxide, its preparation method and apparatus
  • A tetrapod-like nanorod of zinc oxide, its preparation method and apparatus

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Effect test

Embodiment 1

[0043] In the special-purpose tetrapod-shaped zinc oxide nanostructure device of the present invention, a single-crystal silicon wafer is used as a substrate, and zinc oxide nanocrystals are used as a catalyst (seed crystal) layer, and a diameter of 60 to 80 nanometers and a length of 300 to 500 nanometers are prepared. Micron single-crystal zinc oxide nanorods are self-assembled into tetrapod-shaped zinc oxide nanostructures with a purity of more than 99%.

[0044] 1. Preparation of zinc oxide nanocrystalline substrate.

[0045] Analytical pure ZnSO 4 (99.9%) and concentrated ammonia water (25-28%) are formulated into zinc ammonium ion ([Zn(NH 3 ) 4 ] 2+ ) solution, namely 0.1mol / l ZnSO 4 Put 50ml of the solution in a 500ml small beaker, and add concentrated ammonia water dropwise to it while stirring until the solution is in a clear and transparent state. At this time, about 4ml of concentrated ammonia water was added.

[0046] Using the above-mentioned zinc ammine ions...

Embodiment 2

[0055] In the above-mentioned device of Example 1, the monocrystalline silicon wafer is used as the substrate, and the nickel oxide nanoparticle layer is used as the catalytic substrate to prepare tetrapods with an outer diameter of 60 to 100 nanometers, a length greater than 500 nanometers, and a purity of more than 99%. ZnO nanostructures.

[0056] 1. Preparation of Nickel Oxide Nanoparticle Layer

[0057] The specific process is: dissolving nickel nitrate (analytical pure) particles in alcohol with a concentration of 0.01M. Take a silicon wafer with a size of 20×10mm, drop a drop of nickel nitrate alcohol solution on it with a dropper, and let it dry naturally for 1 hour at room temperature. After holding the temperature at 600°C for 15 minutes, the desired substrate can be obtained.

[0058] 2. Preparation of catalytic metal film and nano-metal particles, and in-situ growth of scaly carbon nanotubes.

[0059] The preparation process of the tetrapod zinc oxide nanostruct...

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Abstract

The invention relates to a four-pin zinc oxide nanometer stick and the process for preparing the same and preparing device. The process comprises: designing current air transferring device; preparing mixing powder; preparing supporting base catalyst layer; zinc oxide four-pin structure growth; systhesizing zinc oxide nanameter stick at 850-950 Deg. C and its self-organizing assembly; forming four-pin zinc oxide nanometer structure of three-dimensional with 110 degree. The zinc comes from decomposition of cheap zinc salt and reduction of carbon, and the supporting base is zinc oxide nanometer crystqal layer or cheap metallic oxide nanometer granular layer. The inventio is characterized by cheap raw material, low working temperature, simple method for getting catalyst, and simple structure of mixing device and easy for industrial production.

Description

technical field [0001] The invention relates to a tetrapod-shaped zinc oxide nanorod, a preparation method and a preparation device thereof, and belongs to the field of nanomaterials. Background technique [0002] One-dimensional nanomaterials have unique physical and chemical properties, and have great application potential in the construction of nanoscale electronic and optoelectronic devices, and have become one of the new materials that has attracted much attention in the field of nanotechnology research. The research on one-dimensional nanomaterials began in 1991, when Japanese scientist Sumio Iijima first observed carbon nanotubes under an electron microscope [Nature 354, 56 (1991)]. Subsequent research on carbon nanotubes and their related derivatives has made many major breakthroughs, which has greatly promoted the research on the preparation and properties of related one-dimensional nanomaterials, especially nanowires (rods). [0003] ZnO is an excellent semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82B1/00
Inventor 于伟东李效民高相东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI