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Production and application of Pt-SnO2 oxide semiconductor carbon monoxide sensor

A technology of oxide semiconductor and carbon monoxide, which is applied in the detection of carbon monoxide concentration in mines and atmospheric environments. In the field of Pt-SnO2 oxide semiconductor carbon monoxide sensor preparation, it can solve the problems of low sensitivity and high detection limit of the sensor, and achieve high sensitivity, The effect of low detection limit and simple method

Inactive Publication Date: 2016-07-27
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main factors limiting the practicality of this type of sensor is the high detection limit and low sensitivity of the sensor.

Method used

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  • Production and application of Pt-SnO2 oxide semiconductor carbon monoxide sensor
  • Production and application of Pt-SnO2 oxide semiconductor carbon monoxide sensor
  • Production and application of Pt-SnO2 oxide semiconductor carbon monoxide sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Pt-SnO with a mass ratio of element Pt / Sn in the reactant of 0.015:1 2 Oxide semiconductors are used as sensitive materials to make side-heated carbon monoxide sensors. The specific manufacturing process:

[0038] (1) First, 0.9gSnCl 2 2H 2 O, 2.94gNa 3 C 6 h 5 o 7 2H 2 O, 10mlNaOH (0.2M), and 10ml water were stirred for 10 minutes to form a homogeneous solution. 2 PtCl 6 Put into the above solution and continue to stir for 10 minutes, so that the mass ratio of element Pt and element Sn is 1.5wt%;

[0039] (2) Put the mixed solution of (1) into a 100ml polytetrafluoroethylene kettle, seal it, put it into a microwave hydrothermal system, and set the microwave parameters as follows: the maximum power is 300W, first heat it to 180°C for 10 minutes, and keep the temperature at 180°C for one hour. After the end, the temperature was naturally lowered to room temperature, and the sample was collected by centrifugation with ethanol and deionized water, and then placed ...

Embodiment 2

[0043] Pt-SnO with a mass ratio of element Pt / Sn in the reactant of 0.030:1 2 Oxide semiconductors are used as sensitive materials to make side-heated carbon monoxide sensors. The specific manufacturing process:

[0044] (1) First, 0.9gSnCl 2 2H 2 O, 2.94gNa 3 C 6 h 5 o 7 2H 2 O, 10mlNaOH (0.2M), and 10ml water were stirred for 10 minutes to form a homogeneous solution. 2 PtCl 6 Put into the above solution and continue to stir for 10 minutes, so that the mass ratio of element Pt and element Sn is 3.0wt%;

[0045] (2) Put the mixed solution of (1) into a 100ml polytetrafluoroethylene kettle, seal it, put it into a microwave hydrothermal system, and set the microwave parameters as follows: the maximum power is 300W, first heat it to 180°C for 10 minutes, and keep the temperature at 180°C for one hour. After the end, the temperature was naturally lowered to room temperature, and the sample was collected by centrifugation with ethanol and deionized water, and then placed ...

Embodiment 3

[0049] Pt-SnO with a mass ratio of element Pt / Sn in the reactant of 0.045:1 2 Oxide semiconductors are used as sensitive materials to make side-heated carbon monoxide sensors. The specific manufacturing process:

[0050] (1) First, 0.9gSnCl 2 2H 2 O, 2.94gNa 3 C 6 h 5 o 7 2H 2 O, 10mlNaOH (0.2M), and 10ml water were stirred for 10 minutes to form a homogeneous solution. 2 PtCl 6 Put into the above solution and continue to stir for 10 minutes, so that the mass ratio of element Pt and element Sn is 4.5wt%;

[0051] (2) Put the mixed solution of (1) into a 100ml polytetrafluoroethylene kettle, seal it, put it into a microwave hydrothermal system, and set the microwave parameters as follows: the maximum power is 300W, first heat it to 180°C for 10 minutes, and keep the temperature at 180°C for one hour. After the end, the temperature was naturally lowered to room temperature, and the sample was collected by centrifugation with ethanol and deionized water, and then placed ...

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Abstract

A Pt‑SnO 2 The invention relates to a preparation method of an oxide semiconductor carbon monoxide sensor and its application in detecting the concentration of carbon monoxide in mines and atmospheric environments, belonging to the technical field of gas sensors. The sensor is made of commercially available Al with 2 ring-shaped gold electrodes on its outer surface. 2 o 3 Insulating ceramic tube, coated with ring-shaped gold electrodes and Al 2 o 3 Pt‑SnO on the outer surface of an insulating ceramic tube 2 Oxide semiconductor sensitive material, through Al 2 o 3 It consists of a nickel-cadmium alloy heating coil inside an insulated ceramic tube. The sensor has good linearity to low concentration of carbon monoxide (lower detection limit 10ppm), these characteristics make Pt‑SnO 2 The oxide semiconductor carbon monoxide sensor can be well applied to the detection of carbon monoxide in the atmospheric environment and mines, and can further judge mine safety and environmental safety by detecting the concentration of carbon monoxide.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to Pt-SnO 2 A preparation method of an oxide semiconductor carbon monoxide sensor and its application in detecting the concentration of carbon monoxide in mines and atmospheric environments. Background technique [0002] Carbon monoxide (CO) is a colorless, tasteless and odorless gas that is the third most carbon-containing component in the atmosphere, second only to CO 2 and CH 4 , is an important gas in the study of the global carbon cycle. In the case of uneven distribution of emission sources, the concentration of global atmospheric CO has obvious temporal and spatial distribution differences, and it is often used as an important tracer in the study of greenhouse gas sources and sinks. In 1949, CO in the atmosphere was discovered through the study of solar spectrum, and the first measurement of CO concentration in the atmosphere was realized by using the spectrometer meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 王庆吉林君李旭
Owner JILIN UNIV
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