Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof

A technology of cobalt tetroxide nanometer and cobalt tetroxide gas is applied in the field of nano-sensors, which can solve the problems of high optimal working temperature, cumbersome preparation process, poor working performance, etc., and achieve the effects of increasing surface active points, large electron mobility and simple structure

Active Publication Date: 2014-01-29
ZHEJIANG UNIV
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Problems solved by technology

[0008] Aiming at the problems of cumbersome preparation process, high cost, high optimal working temperature and poor working performance of the existing gas sensor, the present in

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  • Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof
  • Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof
  • Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] The gas sensor based on the cobalt trioxide nanoneedle of this implementation, such as figure 1 As shown, it includes an insulating substrate, a comb-shaped intersecting electrode layer and a cobalt tetraoxide gas-sensing sensing layer from bottom to top.

[0052] In this implementation:

[0053] The insulating substrate is a polycrystalline alumina ceramic sheet with an area of ​​2×1cm 2 .

[0054] The diameter of the cobalt trioxide nanoneedle array is 50nm-200nm, and the length is 10μm.

[0055] The material of the comb-shaped intersecting electrode layer is silver-palladium alloy, and the specific structure is as follows: figure 2 As shown, the thickness is 90nm-100nm, and the distance between adjacent intersecting electrodes is 100μm.

[0056] The preparation method of the cobalt trioxide nanoneedle gas sensor based on the pre...

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Abstract

The invention discloses a gas-sensitive sensor based on cobaltosic oxide nanoneedle array as well as a preparation method thereof. The sensor structurally comprises an insulation substrate, a comb-shaped crossed electrode layer and a cobaltosic oxide gas-sensitive sensing layer which is a cobaltosic oxide nanoneedle array from bottom to top in sequence. According to the preparation of the gas-sensitive sensor based on water thermal reaction, the water solution used in the water thermal reaction contains cobalt salt, bonding agents and alkaline reactant; according to the gas-sensitive sensor provided by the invention, the cobaltosic oxide nanoneedle array is taken as the gas-sensitive sensor; the device is simple in structure, and the performance is superior, and the nanoneedle has a large specific surface area and electron mobility, and is beneficial to improving the flexibility of the gas-sensitive sensor, the best working temperature is reduced to be 130 DEG C, the preparation method is simple, the cost is low, and the difficulty of dispersing or operating nano materials is avoided; the prepared gas-sensitive sensor is small in performance difference, and is suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of nanometer sensors, in particular to a gas sensor based on cobalt trioxide nanoneedles and a preparation method thereof. Background technique [0002] With the rapid development of my country's economic level and residents' living standards in recent years, people's demand for gas sensors has become increasingly prominent. Gas sensor, also known as "gas sensor", refers to a sensor device that uses various chemical and physical effects to convert gas composition and concentration into electrical signal output according to certain rules. It is the most active type of chemical sensor. As early as the 1930s, people had discovered that metal oxide semiconductors had a gas-sensing effect. At first, semiconductor gas-sensing sensors were mainly used to detect flammable and toxic gases. Food, mining, national defense security, and automatic monitoring of industrial production have been paid more and more attentio...

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Application Information

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IPC IPC(8): G01N27/12
Inventor 朱丽萍文震李亚光
Owner ZHEJIANG UNIV
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