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Methanol gas sensor and preparation method thereof

A gas sensor and sensor technology, applied in the field of sensors, to achieve the effects of no sintering, good selectivity and high responsiveness

Inactive Publication Date: 2016-06-08
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a sensor based on graphene oxide doped Sn (bipyO 2 ) 2 Cl 2 Methanol gas sensor of gas sensitive material and preparation method thereof

Method used

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  • Methanol gas sensor and preparation method thereof
  • Methanol gas sensor and preparation method thereof

Examples

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Embodiment 1

[0021] 1) Take 100 parts by weight of Sn (bipyO 2 ) 2 Cl 2 The solid was ground for 3 hours, and then uniformly dispersed in deionized water under 30kHz ultrasonic waves; another 0.1 part by weight of graphene oxide was uniformly dispersed in deionized water under 30kHz ultrasonic waves, and then slowly added to Sn under ultrasonic waves. (bipyO 2 ) 2 Cl 2 In the dispersion liquid, evaporate 80%, then add 0.1% polyvinyl alcohol to obtain a sol.

[0022] 2) Take the aluminum oxide ceramic circular substrate, put it into a sodium hydroxide solution with a concentration of 6 mol / liter and boil for 30 minutes, take it out after cooling, rinse it three times with distilled water, and dry it in an oven. Au slurry was coated on the cleaned Al2O3 ceramic substrate to make interdigitated electrodes, dried, and then Pt wires with a diameter of 0.1 mm were welded to the electrodes as lead wires.

[0023] 3) The graphene prepared in step 1) was doped with Sn (bipyO 2 ) 2 Cl 2 The...

Embodiment 2

[0025] 1) Take 100 parts by weight of Sn (bipyO 2 ) 2 Cl 2 The solid was ground for 3 hours, and then uniformly dispersed in deionized water under 40kHz ultrasonic waves; another 0.5 weight of graphene oxide was uniformly dispersed in deionized water under 40kHz ultrasonic waves, and then slowly added to Sn under ultrasonic waves. (bipyO 2 ) 2 Cl 2 In the dispersion liquid, evaporate two-thirds of the water, and then add 0.1% polyvinyl alcohol to obtain a sol.

[0026] 2) Take the aluminum oxide ceramic circular substrate, put it into a sodium hydroxide solution with a concentration of 6 mol / liter and boil for 30 minutes, take it out after cooling, rinse it three times with distilled water, and dry it in an oven. Au slurry was coated on the cleaned Al2O3 ceramic substrate to make interdigitated electrodes, dried, and then Pt wires with a diameter of 0.1 mm were welded to the electrodes as lead wires.

[0027] 3) The graphene prepared in step 1) was doped with Sn (bipyO ...

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Abstract

The present invention discloses a methanol gas sensor and a preparation method thereof. The sensor comprises an insulating ceramic substrate, a pair of metal electrodes arranged on the insulating ceramic substrate, metal leading-out conducting wires, and a gas sensitive material layer sprayed on the metal electrodes and the insulating ceramic substrate, wherein graphene oxide is doped with a Sn(bipyO2)2Cl2 material to form the gas sensitive material layer. The preparation method comprises: taking 100 parts by weight of a Sn(bipyO2)2Cl2 solid, grinding for 3 h, and carrying out ultrasonic uniform dispersion in deionized water; taking 0.1-0.5 part by weight of graphene oxide, carrying out ultrasonic uniform dispersion in deionized water, and slowly adding to the Sn(bipyO2)2Cl2 dispersion system under ultrasonic vibration; and evaporating out a proper amount of water, spraying the obtained sol onto the interdigital electrodes and the insulating substrate, and drying for 4 h. According to the present invention, the sensor has advantages of good selectivity, high response, rapid response, rapid recovery and being free of sintering, and can work at a room temperature.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a methanol gas sensor and a preparation method thereof, the sensor is based on graphene oxide doped Sn (bipyO 2 ) 2 Cl 2 gas sensitive material. Background technique [0002] A gas sensor is a device that converts information such as gas composition and concentration into information that can be used by instruments, computers, etc. Its types include: semiconductor gas sensors, electrochemical gas sensors, catalytic combustion gas sensors, thermal conductivity Gas sensor, infrared gas sensor, etc. Its working principle is generally that gas molecules interact with the surface of gas-sensitive materials such as adsorption, desorption, catalytic combustion, redox, etc., so that the electrochemical properties of the material change. Under the external circuit, through the current and voltage changes in the circuit measurement to achieve gas detection. With the continuous improvement of pe...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 傅铁祥张一翔
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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