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Lanthanum-tin dioxide nanofiber membrane sensitive to carbon dioxide

A technology of nanofiber membrane and tin dioxide, which is applied in the field of gas sensor to achieve the effect of simple preparation, good repeatability and low cost of raw materials

Active Publication Date: 2016-08-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Application Information

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Problems solved by technology

However, few people have studied the effect of the oxygen concentration in the background atmosphere on the CO 2 The effect of sensor detection performance, and understanding this can help us better study the impact of materials on CO 2 sensitive mechanism

Method used

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  • Lanthanum-tin dioxide nanofiber membrane sensitive to carbon dioxide
  • Lanthanum-tin dioxide nanofiber membrane sensitive to carbon dioxide
  • Lanthanum-tin dioxide nanofiber membrane sensitive to carbon dioxide

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Embodiment 1

[0022] Embodiment 1, 0.6 gram of stannous chloride dihydrate and lanthanum chloride (the mole of lanthanum and tin element are 8%) are mixed, then add respectively 4.42 gram of dimethylformamide (DMF) and 4.42 gram of dehydrated alcohol ( A total of 4 samples), the mixture was stirred for 30 minutes until the inorganic salt was completely dissolved, then 0.8 g of polyvinylpyrrolidone (PVP) was added, and stirred for 12 hours to obtain a clear and transparent electrospinning precursor solution. Use a syringe to measure a certain amount of electrospinning precursor for spinning. Set the speed of the syringe pump to 1 ml / hour, the positive power supply voltage of the DC high-voltage power supply to 20 kV, the negative power supply voltage to 1 kV, and the distance between the spinning nozzle and the collecting plate to be 15 cm. The fibers obtained by electrospinning were dried at 60°C for 24 hours and then placed in a tube furnace at 600°C for 2 hours, and the heating rate of th...

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Abstract

The invention provides a preparation method of a La-SnO2 sensor membrane capable of being used for detecting CO2, and belongs to the technical field of gas sensitive sensors. The method comprises the steps that stannous chloride dihydrate is mixed with lanthanum chloride, a La-SnO2 material is prepared through an electrostatic spinning method, and then the material is prepared into a membrane through a silk-screen printing method. The sample can detect large-range-concentration CO2, and the sensitive value of the sample for 1000 ppm CO2 under air atmosphere reaches up to 3.4. The preparation method is simple, the raw material cost is low, repeatability is good, and the material membrane is excellent in performance and has quite good application value and prospect.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a lanthanum-tin dioxide (La-SnO 2 ) Preparation of nanofibrous membrane and its gas-sensing properties to carbon dioxide. Background technique [0002] In recent years, carbon dioxide (CO 2 ) caused by the greenhouse effect has caused abnormal climate change, frequent natural disasters and increased diseases, which have attracted widespread attention from all over the world. 2 It is particularly important to quickly and accurately detect and monitor the concentration. In addition, in the fields of indoor air quality monitoring, agricultural production, clean energy technology, chemical industry, etc., it is also necessary to control CO 2 The concentration is strictly controlled. Therefore, the development of CO with excellent performance 2 Sensors have become a research hotspot at home and abroad. [0003] Currently, detecting CO 2 The means mainly include infrared, el...

Claims

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Application Information

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IPC IPC(8): G01N27/04D04H1/728D04H1/4209B41M1/12
CPCB41M1/12D04H1/4209D04H1/728G01N27/041
Inventor 薛庆忠熊雅鲁文博丁德恭
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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