Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure

A vanadium oxide and nanorod technology, applied in the direction of material resistance, can solve the problems of cumbersome procedures and high cost of gas sensors, and achieve the effects of less process conditions, convenient use, and quick response to recovery time.

Inactive Publication Date: 2016-04-13
TIANJIN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention provides a ceramic-based vanadium oxide nanorod structure at room temperature NO 2 The preparation method of the sensor overcomes the room temperature NO of the vanadium oxide nanorod structure in the prior art 2 The problem of high cost and cumbersome process of gas sensor

Method used

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  • Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure
  • Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure
  • Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Cleaning of ceramic substrates

[0034] Cut a piece of ceramic sheet with a size of 2cm*2cm into two rectangular pieces with a size of 2cm*1cm, then put a complete and two cut pieces of ceramic sheet into a glass, and ultrasonically clean them in acetone and ethanol respectively 5-20 minutes, after cleaning, take out the ceramic substrate and blow off the liquid on the surface of the substrate with a suction ball, after absorbing the liquid, put it on the filter paper and dry it in a vacuum oven at 60-80°C for 5-10 minutes for later use;

[0035] (2) Weigh V 2 o 5 powder

[0036] Weighing 0.15gV 2 o 5 powder spare;

[0037] (3) Preparation of ceramic-based vanadium oxide nanorods by single gas phase transport method

[0038] V of step (2) 2 o 5 Spread the powder evaporation source evenly on the 2cm*2cm ceramic substrate in step (1), and put it into the quartz tube as a whole, and then place it at a distance of V 2 o 5Place two ceramic substrates of 2cm*1cm...

Embodiment 2

[0044] The difference between this example and Example 1 is that: in step (3), the setting working temperature for preparing ceramic-based vanadium oxide nanorods by single vapor transport method is 950°C, and the prepared ceramic-based vanadium oxide nanorods structure gas sensor Sensor element at room temperature to 3ppmNO 2 Gas has a sensitivity of 1.73.

Embodiment 3

[0046] The difference between this example and Example 1 is that: in step (3), the setting working temperature for the preparation of ceramic-based vanadium oxide nanorods by the single gas-phase transport method is 900°C, and the prepared ceramic-based vanadium oxide nanorods structure gas sensor Sensor element at room temperature to 3ppmNO 2 Gas has a sensitivity of 1.62.

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Abstract

The invention discloses a preparation method for a room temperature NO2 sensor with a ceramic-based vanadium oxide nanorod structure. The preparation method comprises the following steps: cleaning of a ceramic substrate; weighing of V2O5 powder; preparation of a ceramic-based vanadium oxide nanorod by using a single vapor transport method; and preparation of a ceramic-based vanadium oxide nanorod gas-sensitive sensor element. The ceramic substrate used in the invention has a rough bottom surface, is low in cost and can easily realize large-area preparation of the vanadium oxide nanorod. The ceramic-based vanadium oxide nanorod gas-sensitive sensor element is simple in structure, low in preparation cost, easy in operation and time-saving and can work at room temperature. Thus, the prepared gas-sensitive sensor element can detect NO2 gas at room temperature and has the advantages of high sensitivity, rapid response, short recovery time and repeatable detection.

Description

technical field [0001] The invention relates to a manufacturing method of a gas sensor element, in particular to a NO sensor suitable for working at room temperature. 2 A method for preparing a ceramic-based vanadium oxide nanorod structure gas sensor for gas. Background technique [0002] Human daily life and production activities are closely related to the surrounding environment. For example, in mining areas, chemical companies, families, etc., changes in the atmosphere have a great impact on human production and work and the body. In recent years, acid rain, the greenhouse effect, the destruction of the ozone layer, and the existence of flammable, explosive, toxic and harmful gases have all become serious human health problems, among which nitrogen oxides (NO X ) gas is the main cause of acid rain and photochemical smog, research and development for nitrogen oxides (NO X ) The sensor structure of gas detection is of great significance. [0003] With the enhancement of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
CPCG01N27/04
Inventor 梁继然李文娇刘俊峰杨然
Owner TIANJIN UNIV
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