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Method for preparing tetrapod-like zinc oxide nanorod

A four-needle zinc oxide and nanorod technology, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of large size and low purity of nanorods, and achieve simple operation, high purity and high product quality. The effect of size and shape stabilization

Active Publication Date: 2014-01-08
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the low-temperature vapor deposition method, does not need a catalyst, and the process temperature used is low, which is easy to realize. However, the nanorods obtained by this method have a large size and low purity.

Method used

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  • Method for preparing tetrapod-like zinc oxide nanorod
  • Method for preparing tetrapod-like zinc oxide nanorod
  • Method for preparing tetrapod-like zinc oxide nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Shred zinc foil with a purity >99.9% and clean it ultrasonically, fill it in one end of a small quartz tube (6) with an inner diameter of 5 mm and leave a gap, and plug the other end with refractory asbestos (9) and leave a gap; then fill it Put the small quartz tube (6) of crushed zinc foil (8) in the porcelain boat; put the porcelain boat (7) into the middle and rear part of the large quartz tube (3) with an inner diameter of 30mm in the tube resistance furnace, and the large quartz tube (3) Three hole plugs are required at the open end, which are nitrogen inlet, oxygen inlet and tail gas outlet respectively. Use a flow meter to adjust the total flow of nitrogen and oxygen into the large quartz tube (3) to be 20 sccm. The nitrogen tube mouth directly passes into the bottom of the large quartz tube (3). Continue to feed nitrogen after it is empty; the oxygen nozzle is placed in the middle of the large quartz tube (3). Oxygen is fed in at a rate of 5% by volume. The ox...

Embodiment 2

[0030] Shred the zinc foil with a purity >99.9% and clean it ultrasonically, fill it in one end of a small quartz tube (6) with an inner diameter of 13mm and leave a gap, and plug the other end with refractory asbestos (9) and leave a gap; then fill it Put the small quartz tube (6) of crushed zinc foil (8) in the porcelain boat, and set the inclination angle of 45°; put the porcelain boat (7) into the large quartz tube (3) with an inner diameter of 65mm in the tubular resistance furnace The opening end of the large quartz tube (3) is required to be provided with three-hole plugs, which are nitrogen inlet, ozone inlet, and exhaust gas outlet. Use a flow meter to adjust the total flow of nitrogen and ozone into the large quartz tube (3) to be 350 sccm. The nitrogen tube mouth directly passes into the bottom of the large quartz tube (3). Continue to feed nitrogen after it is empty; the ozone nozzle is placed in the middle of the large quartz tube. Ozone is introduced at a ratio ...

Embodiment 3

[0032]Shred the zinc foil with a purity >99.9% and clean it ultrasonically, fill it in one end of a small quartz tube (6) with an inner diameter of 20mm and leave a gap, and plug the other end with refractory asbestos (9) and leave a gap; then fill it Put the small quartz tube (6) of broken zinc foil (8) in the porcelain boat, and set the inclination angle of 20°; put the porcelain boat (7) into the large quartz tube (3) with an inner diameter of 100mm in the tubular resistance furnace At the rear, the open end of the large quartz tube (3) requires three-hole plugs, which are nitrogen inlet, oxygen inlet, and exhaust gas outlet. Use a flow meter to adjust the total flow of nitrogen and oxygen into the large quartz tube (3) to 200 sccm. The nitrogen tube mouth directly passes into the bottom of the large quartz tube (3). Continue to feed nitrogen after it is empty; the oxygen nozzle is placed in the middle of the large quartz tube (3). Oxygen is introduced at a ratio of 40% by...

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Abstract

The invention discloses a method for preparing a tetrapod-like zinc oxide nanorod. The method comprises the following steps: (1) putting a small tube filled with zinc foil into a closed big tube, introducing inert gas to evacuate the air in the big tube, then, heating the big tube, and continuing to introduce the inert gas, and simultaneously, introducing an oxygen elementary substance into the big tube, wherein the oxygen elementary substance needs to be dried by an inert drying solution before being introduced; and (2) heating up to 400-900 DEG C, stopping heating, stopping introduction of the oxygen elementary substance, and stopping introduction of the inert gas when the big tube is cooled to be less than 200 DEG C, wherein the tail gas generated in the reaction process needs to be dried by the inert drying solution. The method has the advantages of high product yield, high purity, even and steady size and excellent controllability, and has a large-scale production prospect.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a method for preparing zinc oxide nanorods, in particular to a method for preparing tetrapod-like zinc oxide nanorods. Background technique [0002] As a photoanode material for solar cells, zinc oxide may become a more powerful competitor for photoanode thin film materials. The main reasons are as follows: (1) ZnO is a wide bandgap semiconductor, and TiO 2 For comparison, their physical and chemical properties are very close, and their conduction band energy levels are very different; (2) ZnO is more complex than TiO 2 It has greater electron mobility, which can shorten the transfer time of electrons in the ZnO-based photoanode film, which is conducive to the reception of electrons; (3) the preparation process of ZnO nanomaterials is simple, the method is diverse, and the cost is low; (4) ZnO nanomaterials have many shapes, and low-temperature chemical methods ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/03B82Y40/00B82Y30/00
Inventor 周立亚杨于民庞起
Owner GUANGXI UNIV
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