Method for producing nano-wire or nano-belt of zinc oxide

A zinc oxide nanowire, zinc oxide nanotechnology, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of high reaction temperature, unavailability, strict requirements on atmospheric conditions, etc., and achieves low sintering temperature, simple operation and controllable strong effect

Inactive Publication Date: 2007-09-12
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, zinc oxide nanowires and nanoribbons are mainly prepared by metal-catalyzed vapor phase transfer, high-temperature pyrolysis and high-temperature physical evaporation. Because the reaction temperature of this type of method is higher than 1000 ° C, the atmosphere conditions are strict, and the equipment is expensive, etc., it is not conducive to large-scale production. Large-scale production is not compatible with semiconductor technology and is not conducive to device integration
The alumina template method can better control the diameter and length of zinc oxide nanowires, but because this method is easy to introduce impurities, it is not conducive to the device research of zinc oxide nanomaterials
The current wet chemical preparation method of ZnO cannot obtain long nanowires and nanobelts, which limits the application of ZnO in nanoelectronic devices

Method used

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  • Method for producing nano-wire or nano-belt of zinc oxide
  • Method for producing nano-wire or nano-belt of zinc oxide
  • Method for producing nano-wire or nano-belt of zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In a quartz beaker, dissolve 2g of polyvinyl alcohol with a degree of polymerization of 1000-1500 in 50ml of deionized water at 90°C; add 1g of zinc acetate, stir it mechanically for 0.5h at a speed of 800 rpm, and disperse it with a 40KHz, 150W ultrasonic wave 0.5h. Lay the etched quartz substrate on the bottom of the quartz beaker. Then place the quartz cup in an oven and raise the temperature to 120°C at a rate of 5°C / min and keep it warm for 0.5h until drying; raise the temperature to 200°C at a rate of 3°C / min and keep it warm for 1h. The sample was transferred to a muffle furnace and calcined at 300°C for 0.5h; the temperature was raised to 400°C at a rate of 5°C / min and held for 0.5h; the temperature was raised to 550°C at a rate of 8°C / min and held for 1h. SEM observation found that nanowires with a diameter of 30-50 nm and a length of more than 15 μm and nanobelts with a width of 100-500 nm and a length of more than 20 μm were formed on the substrate, as shown...

Embodiment 2

[0019] This example is similar to Example 1, except that the consumption of zinc acetate and polyvinyl alcohol in step 1 is 2g respectively, and the temperature is raised to 130°C at a rate of 9°C / min, and kept for 0.5h until drying; The temperature was raised to 210°C at a rate of °C / min and kept for 1h. The sample was transferred to a muffle furnace and calcined at 310°C for 0.5h; the temperature was raised to 400°C at a rate of 7°C / min and kept for 1h; the temperature was raised to 560°C at a rate of 10°C / min and kept for 1h. SEM observation found that the product consists of nanobelts with a width of about 100-200 nm and a length of about 15 μm and an area of ​​about 2-6 μm. 2 It is composed of zinc oxide scale flakes, and there are also several nanowires with a diameter of about 20-60nm, as shown in Figure 2.

Embodiment 3

[0021] This example is similar to Example 1, and this example is similar to Example 1, except that the dosages of zinc acetate and polyvinyl alcohol in step 1 are 2g and 1g respectively, and the temperature is raised to 150°C at a rate of 9°C / min , keep warm for 1h until drying; raise the temperature to 210°C at a rate of 3°C / min, and keep warm for 1.5h. The sample was transferred to a muffle furnace and calcined at 310°C for 1 hour; the temperature was raised to 420°C at a rate of 10°C / min, and kept for 1 hour; the temperature was raised to 560°C at a rate of 10°C / min, and held for 3 hours. SEM observation found that the product was composed of nanobelts with a width of 100-1000 nm and a length of about 6 μm, as shown in FIG. 3 .

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Abstract

The invention discloses a method for preparing zinc oxide nano line or zinc oxide nano belt, belonging to technology of preparing zinc oxide nano line and zinc oxide nano belt by adglutinating, comprising the flowing steps: mixing the polyvinyl alcohol and deionized water, batch-water heating until dissolves; mixing zinc acetate and polyvinyl alcohol, separating by mechanical stirring and supersonic wave, immersing the silicon, quarte or glass base plate into solution, layinf it on the bottom of the solution, putting the mixing solution into the baking box for procedure drying, transferring the dried sample into Muffle furnace for progressive warming up and calcining, zinc oxide nano line or zinc oxide nano belt is formed on the baseplate. The invention is characterized by the simple process and controllable shape of the zinc oxide nano line or zinc oxide nano belt. The process is compatible with current semiconductor technology because of the low calcining temperature.

Description

technical field [0001] The invention relates to a method for preparing zinc oxide nanowires or zinc oxide nanobelts, which belongs to the technology of preparing zinc oxide nanowires and nanobelts by sintering. Background technique [0002] ZnO is a wide-bandgap (3.37eV) semiconductor oxide with high melting point and exciton binding energy (60meV). Due to the size-dependent photoelectric effect of ZnO nanowires and ZnO nanoribbons, ZnO nano The structure has broad application prospects in the fields of semiconductor lasers, nanoelectronic devices, gas sensors and solar energy. Due to factors such as structure, size and shape that have a great influence on the characteristics and applications of zinc oxide, zinc oxide nanostructures have a series of excellent properties. Many companies and scientific research institutions are engaged in zinc oxide nanostructures, such as: nanowires, Research on the preparation of nanoribbons, nanorods, nanocombs, etc. At present, zinc oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02
Inventor 李海燕邹强张之圣胡明秦玉香刘志刚王秀宇樊攀峰
Owner TIANJIN UNIV
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