Method of preparing ZnO nano-line with higher length-diameter ratio through carbon thermal reduction technology

A technology of nanowires and aspect ratio, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex preparation process, more preparation conditions, high cost, etc., and achieve preparation cost Low, high-purity effect

Inactive Publication Date: 2013-09-25
SHANGHAI UNIV
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Problems solved by technology

The above-mentioned methods have all obtained zinc oxide nanowires, but the preparation process is relatively complicated, and metal catalysts (Au, Pt, etc.) need to be

Method used

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  • Method of preparing ZnO nano-line with higher length-diameter ratio through carbon thermal reduction technology
  • Method of preparing ZnO nano-line with higher length-diameter ratio through carbon thermal reduction technology
  • Method of preparing ZnO nano-line with higher length-diameter ratio through carbon thermal reduction technology

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Embodiment

[0016] A method for preparing a high aspect ratio ZnO nanowire material, characterized in that it has the following processes and steps:

[0017] A. Put 0.8139g of ordinary zinc oxide powder and 0.12g of activated carbon in an agate mortar, grind for 10-15min, make the two fully mixed, transfer to an alumina porcelain boat, and place in the center of the heating zone of the tube furnace;

[0018] B. Put the cleaned Si (100) on another porcelain boat, slowly put it into the tube furnace so that it is close to the above porcelain boat, and plug one end of the tube furnace with a rubber stopper (see attached Figure 4 );

[0019] C. Turn on the tube furnace and set the program: increase the temperature from room temperature to 950 °C at a rate of 10 °C / min, keep it warm for 30 min, and cool down to room temperature naturally;

[0020] D. Gently take out the porcelain boat with the silicon wafer, and then white ZnO nanowire material can be obtained on the silicon wafer.

[...

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Abstract

The invention relates to a method of preparing a ZnO nano-line material with higher length-diameter ratio through a carbon thermal reduction technology, and belongs to the field of chemical and chemical engineering material preparation processing technology. The method is characterized in that: zinc oxide powder is mixed with activated carbon according to a certain ratio and put in an aluminum oxide porcelain boat, then a silicon slice (100) is put on another boat, and the two boats are arranged tightly with each other; in a tube furnace, at a temperature increasing rate of 10 DEG C per minute, the temperature rises from the room temperature to 950 DEG C and maintains at the temperature for 30 minutes, then the temperature decreases to the room temperature, and finally a pure phase ZnO nano-line deposits on the silicon slice. Crystal phase, morphology and size of the product are analyzed by X-ray powder diffraction (XRD), scan electronic microscope (SEM), and the like. The analysis result shows that the method of preparing a ZnO nano-line material with higher length-diameter ratio through a carbon thermal reduction technology can prepare a ZnO nano-line of a hexagonal wurtzite, and the nano-line has a length of 100 [mu]m, an average diameter of 500 nm, and a length-diameter ratio of 200.

Description

technical field [0001] The invention relates to a method for preparing ZnO nanowire material with high aspect ratio by carbothermal reduction, which belongs to the technical field of chemical and chemical material preparation. Background technique [0002] ZnO is an important metal oxide semiconductor material. Nano-ZnO (nanowires, nanorods, etc.) has been widely used in ultraviolet lasers, photodetectors, gas and chemical sensors, and dye-sensitized solar cells due to its special properties. Huge attention. [0003] The principles of carbon thermal reduction to prepare ZnO nanowires mainly include gas-solid growth mechanism and gas-liquid-solid growth mechanism. The main content of the gas-liquid-solid mechanism: at a certain temperature, chemical reduction or gas phase reaction generates steam, and the gas phase molecules form a eutectic with the molten metal particles as the catalyst. After reaching supersaturation, the required materials are released from the catalyst ...

Claims

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Application Information

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IPC IPC(8): C01G9/03B82Y30/00B82Y40/00
Inventor 李帅朋向群秦楠徐甲强
Owner SHANGHAI UNIV
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