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Preparation method and application of ZnO nanowire sensitive material

A technology of sensitive materials and nanowires, which is applied in the field of preparation of sensitive materials to achieve the effects of not easy to agglomerate, good surface permeability and high purity

Active Publication Date: 2021-08-27
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to adopt a preparation method that is simple to operate, low in cost, and easy for large-scale industrial production remains to be solved

Method used

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  • Preparation method and application of ZnO nanowire sensitive material
  • Preparation method and application of ZnO nanowire sensitive material
  • Preparation method and application of ZnO nanowire sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of ZnO nanomaterials

[0033] Step 1: Use a silicon substrate with a thin layer of silicon oxide on its surface as a substrate, put it in acetone, ethanol, and deionized water for ultrasonic cleaning, and then blow dry.

[0034] Step 2: Weigh 300 mg of high-purity zinc powder, grind it fully with a grinding pot, and place it in the central area of ​​the alumina porcelain boat.

[0035] Step 3: Put the silicon substrate cleaned in step 1 on the alumina porcelain boat in step 1, at a position directly above the Zn source, and then put the porcelain boat into the high-temperature area of ​​the tubular reaction furnace.

[0036] Step 4: Introduce nitrogen as a carrier gas, and the flow rate of nitrogen is 150 mL / min. After 10 minutes, the furnace tube temperature was raised to 750°C at a ramp rate of 10°C / min and maintained at this temperature for 1 hour. Then naturally cooled to room temperature.

[0037] Step 5: Take out the silicon substrate, and find ...

Embodiment 2

[0041] (1) Preparation of ZnO nanomaterials

[0042] Step 4: Introduce nitrogen as a carrier gas, and the flow rate of nitrogen is 150 mL / min. After 10 minutes, the furnace tube temperature was raised to 800°C at a rate of 10°C / min and maintained at this temperature for 1 hour. Then naturally cooled to room temperature.

[0043] Steps 1, 2, 3 and 5 are the same as in Example 1.

[0044] (2) Morphological characterization of ZnO nanomaterials

[0045] The morphology of the product was characterized by scanning electron microscopy. As shown in Figure 1(b), the ZnO product is composed of irregular particles with a particle size of about 50-1000 nm. Compared with Example 1, the particle size is increased, and a thin rod-shaped product appears.

Embodiment 3

[0047] (1) Preparation of ZnO nanomaterials

[0048] Step 4: Introduce nitrogen as a carrier gas, and the flow rate of nitrogen is 150 mL / min. After 10 minutes, the furnace tube temperature was raised to 850°C at a rate of 10°C / min and maintained at this temperature for 1 hour. Then naturally cooled to room temperature.

[0049] Steps 1, 2, 3 and 5 are the same as in Example 1.

[0050] (2) Morphological characterization of ZnO nanomaterials

[0051] The morphology of the product was characterized by scanning electron microscopy. As shown in Figure 1(c), the ZnO product is composed of irregular nanosheets, nanorods, and nanowires, and the particle size is significantly smaller than that of Example 1.

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Abstract

The invention discloses a preparation method and application of a ZnO nanowire sensitive material, and relates to a sensitive material preparation method and application thereof. According to the preparation method, high-purity zinc particles with raw materials easy to obtain serve as a zinc source, high-quality ZnO nanowires grow on the surface of a silicon substrate through a simple thermal evaporation technical route, the whole production process is easy to operate and good in repeatability, the raw materials are easy to obtain, the product is high in purity and good in crystallinity, the preparation method is suitable for industrial production, and no harmful additive or solvent is used in the whole production process. The diameter of the prepared ZnO nanowire array is about 50-200 nm, and the length of the nanowire is more than 10[mu]m. The ZnO nanowire has the advantages of high length-diameter ratio, high specific surface area and difficulty in agglomeration, so that the ZnO nanowire is beneficial to adsorption and desorption of target gas, further has good surface permeability, and accelerates rapid transmission and diffusion of gas, so that the good H2S gas detection characteristics are obtained. The preparation method is especially suitable for batch production of high-quality ZnO gas sensors.

Description

technical field [0001] The invention relates to a method for preparing a sensitive material and its application, in particular to a method for preparing a ZnO nanowire sensitive material and its application. Background technique [0002] Hydrogen sulfide (H 2 S) Gas is a flammable, colorless, highly toxic gas. When the human body inhales a certain amount of H 2 After S gas, it will stimulate people's nasal cavity, throat, and paralyze people's olfactory nerves, leading to respiratory and circulatory failure, pulmonary edema and other symptoms, and severe cases will threaten life safety. At the same time H 2 S is also a highly corrosive gas, which easily corrodes metals and emits a large amount of heat. When the heat dissipation is hindered, the high heat will cause explosion safety accidents. Many workplaces will contain H in the air 2 The maximum allowable concentration of S is 10 ppm. Therefore, for H 2 Efficient, accurate and rapid real-time detection of S gas can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/40B82Y40/00G01N27/12
CPCC23C16/407B82Y40/00G01N27/125
Inventor 孟丹谢书澳李训李旭蕃邬胡倩潘禹伯
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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