Formaldehyde gas sensor based on Ga doped In2O3 nanometer sensitive material with three-dimensional inverse opal structure and preparation method thereof

A technology of inverse opal structure and sensitive material, applied in the field of highly sensitive formaldehyde gas sensor and its preparation, can solve the problems of insufficient discharge of formaldehyde pollutants, insufficient indoor ventilation rate, etc. Active site, the effect of improving the utilization efficiency of sensitive body

Inactive Publication Date: 2019-06-14
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Moreover, modern buildings have better airtightness, which leads to insufficient indoor ventilation rate, which leads to th

Method used

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  • Formaldehyde gas sensor based on Ga doped In2O3 nanometer sensitive material with three-dimensional inverse opal structure and preparation method thereof
  • Formaldehyde gas sensor based on Ga doped In2O3 nanometer sensitive material with three-dimensional inverse opal structure and preparation method thereof
  • Formaldehyde gas sensor based on Ga doped In2O3 nanometer sensitive material with three-dimensional inverse opal structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Ga-doped three-dimensional inverse opal structure In 2 o 3 Microspheres are used as nano-sensitive materials to make formaldehyde gas sensors. The specific manufacturing process is as follows:

[0052] (1) First, add 0.3 g of sodium polystyrene sulfonate, 0.25 g of sodium bicarbonate, and 30 mL of styrene into 300 mL of deionized water in sequence, and heat in a water bath under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) (water bath heating temperature : 70°C) stirring. After stirring for 1 hour, add 0.15 g of potassium persulfate, and continue stirring in a water bath (water bath heating temperature: 70°C) under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) for 18 hours;

[0053] (2) After the reaction is finished, the obtained product is alternately centrifuged and washed with water and ethanol, and the obtained product is dried to obtain polystyrene microsphere powder;

[0054] (3) Add 10 g of polystyrene microsphere powder obtained in step (2) into...

Embodiment 2

[0061] Ga-doped three-dimensional inverse opal structure In 2 o 3 Microspheres are used as nano-sensitive materials to make formaldehyde gas sensors. The specific manufacturing process is as follows:

[0062] (1) First, add 0.3 g of sodium polystyrene sulfonate, 0.25 g of sodium bicarbonate, and 30 mL of styrene into 300 mL of deionized water in sequence, and heat in a water bath under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) (water bath heating temperature : 70°C) stirring. After stirring for 1 hour, add 0.15 g of potassium persulfate, and continue stirring in a water bath (water bath heating temperature: 70°C) under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) for 18 hours;

[0063] (2) After the reaction is finished, the obtained product is alternately centrifuged and washed with water and ethanol, and the obtained product is dried to obtain polystyrene microsphere powder;

[0064] (3) Add 10 g of polystyrene microsphere powder obtained in step (2) into...

Embodiment 3

[0071] Ga-doped three-dimensional inverse opal structure In 2 o 3 Microspheres are used as sensitive materials to make formaldehyde gas sensors. The specific manufacturing process is as follows:

[0072] (1) First, add 0.3 g of sodium polystyrene sulfonate, 0.25 g of sodium bicarbonate, and 30 mL of styrene into 300 mL of deionized water in sequence, and heat in a water bath under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) (water bath heating temperature : 70°C) stirring. After stirring for 1 hour, add 0.15 g of potassium persulfate, and continue stirring in a water bath (water bath heating temperature: 70°C) under a nitrogen atmosphere (nitrogen flow rate: 30 sccm) for 18 hours;

[0073] (2) After the reaction is finished, the obtained product is alternately centrifuged and washed with water and ethanol, and the obtained product is dried to obtain polystyrene microsphere powder;

[0074] (3) Add 10 g of polystyrene microsphere powder obtained in step (2) into 40 m...

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Abstract

The invention relates to a formaldehyde gas sensor based on a Ga doped In2O3 nanometer sensitive material with a three-dimensional inverse opal structure and a preparation method thereof, and belongsto the technical field of gas sensors. The formaldehyde gas sensor comprises an Al2O3 ceramic tube substrate with two parallel, annular and discrete gold electrodes on the outer surface; the Ga dopedIn2O3 nanometer sensitive material with a three-dimensional inverse opal structure coating the outer surface of the ceramic tube and the gold electrodes; and a nickel chromium alloy heating coil passing through the inner of the Al2O3 ceramic tube substrate. The sensor has the advantages that the sensitivity to 100ppm formaldehyde is up to 48.8; the detection lower limit can reach 0.05ppm; and goodselectivity and long-term stability are achieved. Thus, the sensor has a broad application prospect in the field of formaldehyde gas detection of indoor pollutants.

Description

technical field [0001] The invention belongs to the technical field of semiconductor oxide gas sensors, in particular to a Ga-doped three-dimensional inverse opal structure In 2 o 3 A high-sensitivity formaldehyde gas sensor of nano-sensitive materials and a preparation method thereof. Background technique [0002] In recent years, with the gradual improvement of people's living standards, people's requirements for quality of life are also getting higher and higher. Now people's decoration is more pursuit of home decoration taste and design. However, plywood, glue, interior wall paint, wallpaper, lime, adhesive, foam plastic, paint and other decoration materials are indispensable in the decoration process of new houses. These decoration materials All of them contain formaldehyde, and the worse the quality, the more harmful substances such as formaldehyde are contained. In addition, the board furniture, mattresses, and curtains purchased by the owner contain formaldehyde. ...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 卢革宇王天双孙鹏刘方猛刘凤敏高原闫旭梁喜双
Owner JILIN UNIV
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