zno/znfe 2 o 4 Composite sensitive material, preparation method and application in acetone gas sensor

A gas sensor and composite sensitive technology, which can be used in material resistance, separation methods, chemical instruments and methods, etc., and can solve problems such as harsh experimental conditions, restricting application and development, and cumbersome operating procedures.

Active Publication Date: 2017-07-18
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned synthetic methods have many serious shortcomings in practical applications, such as cumbersome operating procedures, lengthy reaction process, large energy consumption and harsh experimental conditions.
These deficiencies greatly restrict their application and development

Method used

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  • zno/znfe <sub>2</sub> o <sub>4</sub> Composite sensitive material, preparation method and application in acetone gas sensor

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Embodiment 1

[0043] With ZnO / ZnFe 2 o 4 The heterogeneous structure is a sensitive material to make an acetone gas sensor, and the specific method is as follows:

[0044] ①Add 1.1g Zn(CH 3 COO) 2 2H 2 O and 0.0588g Na 3 C 6 h 5 o 7 2H 2 O was sequentially added to 200mL deionized water, kept stirring to make it fully dissolved, then measured 6mL ammonia water (30wt%) and added to the above solution, and kept stirring for 5min;

[0045] ② Transfer the obtained clear solution to a three-necked flask, and use microwave to heat the reaction solution to 90°C, set the heating time to 40min, and set the heating power to 300W;

[0046] ③ After the reaction, the microwave heating system automatically stops heating. After the reaction system is naturally cooled to room temperature, the three-necked flask is taken out, and the obtained white precipitate is alternately centrifuged and washed 6 times with deionized water and ethanol to wash off the remaining residue in the reaction solution. ...

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Abstract

The invention belongs to the technical field of metal oxide gas sensors, in particular to a composite sensitive material ZnO / ZnFe 2 o 4 The design, synthesis and application in acetone gas sensor. In the process of designing and preparing sensitive materials, the present invention firstly uses microwave heating technology to successfully synthesize ZnO hollow microspheres, and then grows a layer of ZnFe on the surface of ZnO hollow microspheres by means of epitaxial growth. 2 o 4 Nanosheets. The whole synthesis process is simple, efficient and energy-saving, and is suitable for large-scale production. Compared with single-component ZnO hollow microspheres, after ZnFe 2 o 4 The ZnO gas sensor modified by nanosheets can show more excellent gas sensing characteristics to acetone. In addition, this type of gas sensor is small in size and low in cost, making this ZnO / ZnFe-based 2 o 4 The gas sensor with heterogeneous structure is more suitable for the monitoring of acetone gas.

Description

technical field [0001] The invention belongs to the technical field of metal oxide gas sensors, in particular to ZnO / ZnFe 2 o 4 Composite sensitive material, preparation method and application in acetone gas sensor. Background technique [0002] With the continuous innovation of sensitive materials, various gas-sensitive materials have been developed successively. Among many gas-sensing materials, metal oxide semiconductors are considered to be the most promising gas-sensing materials due to their high sensitivity, low preparation cost, non-toxic environmental protection, and easy integration. Therefore, in recent years, metal oxides have received extensive attention and been vigorously developed. According to the type of majority carriers, metal oxide semiconductors can be divided into n-type sensitive materials (such as In 2 o 3 , SnO 2 , ZnO, Fe 2 o 3 、WO 3 etc.) and p-type sensitive materials (such as NiO, Co 3 o 4 , CuO, etc.). Although gas sensors based on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12B81B1/00B81C99/00
Inventor 卢革宇李晓伟孙鹏刘凤敏孙彦峰
Owner JILIN UNIV
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