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Isopropanol gas-sensitive element based on ZnSnO3 nanospheres of perovskite structures and preparation method of element

A technology of perovskite structure and gas sensor, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for sensing, can solve the problems of high working temperature, low sensitivity, complex manufacturing process, etc., and achieve small particle size , high sensitivity, simple operation process

Active Publication Date: 2019-11-05
NORTHEASTERN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Aiming at the shortcomings of current semiconductor metal oxide gas sensors, such as complex manufacturing process, high working temperature and low sensitivity, the present invention provides a sensor based on perovskite structure ZnSnO 3 The preparation method of the ppb level isopropanol gas sensor of the nanosphere, the purpose is to optimize the preparation of ZnSnO with high crystallization degree, uniform shape, good dispersion and large specific surface area by co-precipitation method 3 nanospheres, and using these ZnSnO 3 Nanospheres prepare gas sensors with advantages such as high sensitivity, low operating temperature, low detection concentration, fast response / recovery rate, and good stability

Method used

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  • Isopropanol gas-sensitive element based on ZnSnO3 nanospheres of perovskite structures and preparation method of element
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  • Isopropanol gas-sensitive element based on ZnSnO3 nanospheres of perovskite structures and preparation method of element

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Embodiment 1

[0035] Based on the perovskite structure ZnSnO of the present embodiment 3 Nanosphere ppb level isopropanol gas sensor, its main structure schematic diagram is as follows figure 1 As shown, it includes a gas-sensitive coating 1, a ceramic tube 2, a heating wire 3, a platinum wire 4, a gold electrode 5, and a base 6, wherein the gold electrode 5 is wound on the surface of the ceramic tube 2 and welded to form a ceramic tube electrode. The sensitive coating 1 is coated on the surface of the whole ceramic tube 2 and the gold electrode 5; the heating wire 3 traverses in the ceramic tube 2 and is welded on the heating electrode of the base 6; the platinum wire 4 is connected with the gold electrode 5, and The four measuring electrodes welded on the base 6 are made based on the perovskite structure ZnSnO 3 Nanosphere ppb grade isopropanol gas sensor. The material of the gas sensitive coating 1 is ZnSnO 3 Nanospheres, the nanospheres have a diameter of 500±50nm, good dispersion, s...

Embodiment 2

[0047] Based on the perovskite structure ZnSnO of the present embodiment 3 The schematic diagram of the main structure of the ppb level isopropanol gas sensor of the nanosphere is as shown in the figure. figure 1 As shown, it includes a gas-sensitive coating 1, a ceramic tube 2, a heating wire 3, a platinum wire 4, a gold electrode 5, and a base 6, wherein the gold electrode 5 is wound on the surface of the ceramic tube 2 and welded to form a ceramic tube electrode. The sensitive coating 1 is coated on the surface of the whole ceramic tube 2 and the gold electrode 5; the heating wire 3 traverses in the ceramic tube 2 and is welded on the heating electrode of the base 6; the platinum wire 4 is connected with the gold electrode 5, and The four measuring electrodes welded on the base 6 are made based on the perovskite structure ZnSnO 3 Nanosphere ppb grade isopropanol gas sensor. The gas-sensitive coating 1 is ZnSnO 3 Nanospheres, the nanospheres have a diameter of 500±50nm, g...

Embodiment 3

[0055] Based on the perovskite structure ZnSnO of the present embodiment 3 The schematic diagram of the main structure of the ppb level isopropanol gas sensor of the nanosphere is as shown in the figure. figure 1 As shown, it includes a gas-sensitive coating 1, a ceramic tube 2, a heating wire 3, a platinum wire 4, a gold electrode 5, and a base 6, wherein the gold electrode 5 is wound on the surface of the ceramic tube 2 and welded to form a ceramic tube electrode. The sensitive coating 1 is coated on the surface of the whole ceramic tube 2 and the gold electrode 5; the heating wire 3 traverses in the ceramic tube 2 and is welded on the heating electrode of the base 6; the platinum wire 4 is connected with the gold electrode 5, and Welded on the four measuring electrodes of the base 6, made based on the perovskite structure ZnSnO 3 Nanosphere ppb grade isopropanol gas sensor. The gas-sensitive coating 1 is ZnSnO 3 Nanospheres, the nanospheres have a diameter of 500±50nm, g...

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Abstract

The invention discloses an isopropanol gas-sensitive element based on ZnSnO3 nanospheres of perovskite structures and a preparation method of the element and belongs to the technical field of semiconductor metal oxide gas-sensitive elements. The gas-sensitive element is mainly composed of an electrode element and the ZnSnO3 nanospheres evenly coating the electrode element, the diameters of the ZnSnO3 nanospheres are 500+ / -50 nanometers, the ZnSnO3 nanospheres are of the perovskite structures, and the isopropanol concentration detection range of the gas-sensitive element is 500 ppb-500 ppm. Theoperation process is simple, the reaction conditions are mild, and easy control and large-batch production can be achieved. The ppb-grade isopropanol gas-sensitive element based on the ZnSnO3 nanospheres of the perovskite structures has the advantages of ppb-grade detection, quick response restoration, good reversibility and high selectivity, the maximum sensitivity to isopropanol gas at the working temperature of 200 DEG C is obtained, and the isopropanol gas-sensitive element has good development prospects.

Description

technical field [0001] The invention belongs to the technical field of semiconductor metal oxide gas sensor, in particular to a ZnSnO based perovskite structure 3 Nanosphere isopropanol gas sensor and preparation method thereof. Background technique [0002] Isopropanol is an important chemical raw material, commonly used in various industrial production fields such as preservatives, cosmetics, cleaning agents and pharmaceutical industries. However, isopropanol is also a highly volatile and flammable organic solvent, which poses a risk of explosion when exposed to heat or a flame atmosphere. In addition, isopropanol is also a slightly toxic volatile organic compound (volatile organic compound, VOC). When the concentration of isopropanol gas in the air is low, it will damage the upper respiratory tract, retina and optic nerve of the human body; when isopropanol When the concentration is too high, it will cause symptoms such as headache and nausea, and in severe cases, it wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12B82Y15/00G01N23/207
CPCB82Y15/00G01N23/207G01N27/127
Inventor 沈岩柏殷尧禹赵思凯周鹏飞李昂高淑玲魏德洲张云海魏可峰
Owner NORTHEASTERN UNIV
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