Method for preparing composite air-sensitive membrane of carbon nano tube embedded with oxide quantum dots

A carbon nanotube composite and oxide technology, which is applied in the direction of measuring devices, instruments, and analytical materials, can solve the problems of difficult to accurately distinguish gas types and poor gas-sensing selectivity of carbon nanotubes.

Active Publication Date: 2012-05-23
CHANGZHOU RUIFENGTE TECH CO LTD
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Problems solved by technology

However, the gas-sensing selectivity of carbon nanotubes is relatively poor, and it is difficult to accurately distinguish the types of gases

Method used

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  • Method for preparing composite air-sensitive membrane of carbon nano tube embedded with oxide quantum dots
  • Method for preparing composite air-sensitive membrane of carbon nano tube embedded with oxide quantum dots

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Experimental program
Comparison scheme
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Embodiment Construction

[0011] refer to figure 1 As shown, 1 is a substrate, 2 is an oxide particle film layer, and 3 is a carbon nanotube film. A layer of oxide film is arranged on the base, and a dendritic carbon nanotube composite film embedded with oxide quantum dots is grown on the oxide film.

[0012] refer to figure 2 The SEM photo of the carbon nanotube tin oxide composite film shown, the dendritic carbon nanotubes are wrapped by tin oxide particles, and the grown carbon nanotubes are bamboo-shaped, and it can be clearly seen that there are tin oxide quantum dots embedded in the The walls and interior of carbon nanotubes.

[0013] According to the technical scheme of the present invention, the specific requirements for the preparation method of the dendritic carbon nanotube composite gas-sensitive film embedded with oxide quantum dots are as follows: 1) the oxide particles are obtained by ball milling, and the oxide film layer is obtained by passing through a screen It is formed by printi...

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Abstract

The invention discloses a method for preparing a composite air-sensitive membrane of a carbon nano tube embedded with oxide quantum dots. The composite air-sensitive membrane is prepared by preparing a layer of an oxide nano particle membrane layer on a silicon substrate, sintering the silicon substrate in a sintering furnace at a high temperature and then growing a carbon nano tube on the oxide nano particle membrane through high-temperature pyrolysis. The composite air-sensitive membrane is the dendritic carbon nano tube embedded with the oxide quantum dots. The air-sensitive membrane with a composite structure increases passages for electron transportation and absorption, increases surface area and contributes to improvement on air sensitivity and selectivity. The preparation process of the composite air-sensitive membrane has the advantages of simple operation and low cost.

Description

technical field [0001] The invention belongs to the field of preparation of sensitive thin films of gas-sensitive sensors, and relates to a preparation method of a carbon nanotube composite gas-sensitive film embedded with oxide quantum dots. Background technique [0002] The main principle of the gas sensor is that the detected gas reacts with the gas-sensitive film, causing changes in the material structure and surface state of the gas-sensitive film, and converting this property change into electrical signal output such as resistance, conductance, and capacitance. Information such as the composition and concentration of the gas can be analyzed through the output electrical signal. Therefore, for gas detection, the role of the sensitive membrane is very important. The sensitive film often largely determines the key characteristics of the gas sensor, such as the structure, power consumption, life, sensitivity, response time, and detection range. Semiconductor metal oxides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00C04B41/50C03C17/22
Inventor 李昕左曙刘卫华张勇朱长纯
Owner CHANGZHOU RUIFENGTE TECH CO LTD
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