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A sensor based on tin dioxide functionalized graphene and its preparation method and application

A technology of tin dioxide and sensors, applied in the direction of material resistance, etc., can solve the problems of expensive and bulky instruments, and achieve the effects of low detection limit, low cost and controllable shape

Active Publication Date: 2017-01-04
SUZHOU LEANSTAR ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the detection method of benzene series in the air is mainly gas chromatography, and spectrometry is also used in a small amount. Gas chromatography is a standard detection method stipulated by the state. The instruments required by this method are relatively large and expensive.

Method used

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  • A sensor based on tin dioxide functionalized graphene and its preparation method and application
  • A sensor based on tin dioxide functionalized graphene and its preparation method and application
  • A sensor based on tin dioxide functionalized graphene and its preparation method and application

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Embodiment 1

[0031] A kind of embodiment of the preparation method of the sensor based on tin dioxide functionalized graphene of the present invention, its process is as follows figure 1 As shown, the method includes the following steps:

[0032] (1) Add tin protochloride to deionized water and carry out hydrolysis reaction, the mass ratio of described tin protochloride and described deionized water is 1:200, react 90min at 40 ℃, it is carried out during reaction Stir, stirring speed is 100r / min, obtains uniform basic stannous chloride suspension;

[0033] (2) Add a graphene aqueous solution with a concentration of 0.05 mg / mL between the gold (Au) electrodes of the aluminum oxide ceramic chip through a sampler, and then place it in a vacuum drying oven and dry it at 170 ° C for 1 h , removing the solvent in the graphene solution, depositing a layer of graphene between the electrodes, forming a conductive layer between the electrodes, and measuring the resistance between the metal electrod...

Embodiment 2

[0037] A kind of embodiment of the preparation method of the sensor based on tin dioxide functionalized graphene of the present invention, its process is as follows figure 1 As shown, the method includes the following steps:

[0038] (1) adding stannous chloride to deionized water for hydrolysis reaction, the mass ratio of stannous chloride to deionized water is 5:200 and reacted for 70min at 55°C, stirring it during the reaction , stirring speed is 40r / min, obtains uniform basic tin protochloride suspension;

[0039](2) add the graphene solution that concentration is 0.01mg / mL by injector between the gold (Au) electrode of aluminum oxide ceramic chip, the solvent in the described graphene solution is dimethylformamide, then It is placed in a vacuum drying oven, dried at 170°C for 1h, the solvent in the graphene solution is removed, a layer of graphene is deposited between the electrodes, a conductive layer is formed between the electrodes, and the probe station measures The...

Embodiment 3

[0043] A kind of embodiment of the preparation method of the sensor based on tin dioxide functionalized graphene of the present invention, its process is as follows figure 1 As shown, the method includes the following steps:

[0044] (1) Add tin protochloride to deionized water and carry out hydrolysis reaction, the mass ratio of described stannous chloride and described deionized water is 1:100, react 50min at 65 ℃, it is carried out during reaction Stirring, the stirring speed is 70r / min, obtains uniform basic tin protochloride suspension;

[0045] (2) add the graphene solution that concentration is 0.03mg / mL by injector between the gold (Au) electrode of aluminum oxide ceramic chip, the solvent in the described graphene solution is N-methylpyrrolidone, then It is placed in a vacuum drying oven, dried at 170°C for 1h, the solvent in the graphene solution is removed, a layer of graphene is deposited between the electrodes, a conductive layer is formed between the electrodes,...

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Abstract

The invention provides a method for preparing a sensor based on tin dioxide functionalized graphene, the method is carried out by putting an aluminum oxide chip deposited with graphene into a basic tin protochloride suspension in a water bath, and then Take it out and clean it, anneal it in an oxygen-containing atmosphere, and finally obtain a sensor of nano-tin dioxide functionalized graphene. The preparation method is simple, easy to operate, low in cost, and can be produced on a large scale, and the size of the nano-tin dioxide in the sensor prepared by this method is uniform, and the shape is controllable. The sensor can realize the detection of different concentrations of benzene series gas Perform real-time, rapid, and accurate detection with low detection limits and high sensitivity.

Description

technical field [0001] The invention relates to a method for preparing a sensor, in particular to a method for preparing a sensor based on tin dioxide functionalized graphene. Background technique [0002] In recent years, "indoor air pollution" in my country has become the third largest type of air pollution after "soot pollution" and "photochemical pollution". Due to the widespread use of building decoration materials containing harmful chemicals, indoor air pollution caused by excessive benzene series is becoming more and more common. Long-term exposure to low-concentration benzene series can cause chronic poisoning, neurasthenia such as dizziness, insomnia, listlessness, and memory loss. It can cause bone marrow hematopoietic dysfunction, and also have a certain impact on reproductive function, and even cause cancer risk. According to the "OECD China Environmental Performance Evaluation" report released by the Ministry of Environmental Protection and the OECD on July 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
Inventor 丁海燕张珽李光辉祁明锋刘瑞沈方平谷文
Owner SUZHOU LEANSTAR ELECTRONICS TECH