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Zinc oxide-based ammonia gas sensor and ammonia gas detector

A technology of ammonia sensor and detection device, which is applied in the field of sensors, can solve the problems of neglect, difficulty in collection and utilization, etc., and achieve the effect of simple preparation process and reversible adsorption process

Active Publication Date: 2015-06-24
NEWNAGY TANGSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triboelectricity is one of the most common phenomena in nature, but it is ignored because it is difficult to collect and utilize
So far, there has been no report on the application of triboelectricity combined with zinc oxide materials to ammonia sensors

Method used

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  • Zinc oxide-based ammonia gas sensor and ammonia gas detector
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  • Zinc oxide-based ammonia gas sensor and ammonia gas detector

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Experimental program
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Embodiment approach

[0044] Combine below image 3 and Figure 4 , the first specific embodiment of the present invention will be described in detail. The ammonia gas sensor 1 based on zinc oxide includes: a first friction layer 11 ; a zinc oxide layer 12 disposed on the second side surface of the first friction layer; and a second friction layer 13 .

[0045] The first friction layer 11 includes a first electrode layer 111 and a first high molecular polymer insulation layer 112 which are laminated. The zinc oxide layer 12 is disposed on the surface of the first polymer insulating layer 112 , and the side surface of the first polymer insulating layer 112 on which the zinc oxide layer is disposed is the second side surface of the first friction layer 11 .

[0046] The material used for the first polymer insulating layer 112 can be polyethylene terephthalate, polyvinyl chloride, polyethylene, polytetrafluoroethylene, polypropylene, polydimethylsiloxane, polyvinylidene fluoride , fluorinated ethyl...

Embodiment 1

[0072] The size of the ammonia sensor obtained in this embodiment is 2.5cm×2.5cm. Such as image 3 and Figure 4 As shown, the first friction layer 11 includes a stacked first electrode layer 111 and a first polymer insulating layer 112. The first polymer insulating layer is polyethylene terephthalate with a thickness of 0.12 mm. The first electrode layer 111 is copper foil with a thickness of 0.18mm. The first electrode layer 111 is pasted on one side surface of the first polymer insulating layer 112 to form a laminated body. The surface of the laminate on the first electrode layer 111 side is the first side surface of the first friction layer 11 , and the surface of the laminate on the first polymer insulating layer 112 side is the second side surface of the first friction layer 11 .

[0073] The zinc oxide layer 12 is disposed on the surface of the first polymer insulating layer 112 by using a solid phase method. Disperse zinc oxide particles (average volume particle s...

Embodiment 2

[0078] The size of the ammonia sensor obtained in this embodiment is 2.5cm×2.5cm. Such as image 3 and 4 As shown, the first friction layer 11 includes a stacked first electrode layer 111 and a first polymer insulating layer 112. The first polymer insulating layer is polyethylene terephthalate with a thickness of 0.12 mm.

[0079] The zinc oxide layer 12 is disposed on the surface of the first polymer insulating layer 112 by a hydrothermal method. First deposit a gold film layer of about 50-70nm by ion sputtering on one side of the polyethylene terephthalate, and then put the gold-deposited polyethylene terephthalate into the zinc-containing solution. In a sealed bottle. The volume of the sealed bottle is 250ml. The formula of the zinc-containing solution is to dissolve 0.238 g of zinc nitrate hexahydrate in 40 ml of deionized water, and then add 1 ml of ammonia water. The growth temperature of zinc oxide nanowires is 90° C. for 5 hours. After the growth of the ZnO zinc...

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Abstract

The invention provides a zinc oxide-based ammonia gas sensor. The ammonia gas sensor comprises a first frictional layer, a zinc oxide layer arranged on a second side surface of the first frictional layer and a second frictional layer. A second side surface of the second frictional layer is arranged relative to the second side surface of the first frictional layer. Pressure is applied on a first side surface of the first frictional layer and / or a first side surface of the second frictional layer. A friction interface is formed between the second side surface of the first frictional layer and the zinc oxide layer arranged on the second side surface of the first frictional layer and the second side surface of the second frictional layer. The first frictional layer and the second frictional layer form a signal output end of the ammonia gas sensor. Zinc oxide can respond to ammonia gas at room temperature, thus causing quantity changes of electric charges on the surface of zinc oxide and reducing output voltage. The ammonia gas sensor has characteristics of high sensitivity and short response time.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a zinc oxide-based ammonia sensor. Background technique [0002] With the continuous improvement of modern living standards and the accelerated pace of life, self-generating equipment with convenient application and low dependence on the environment has emerged. Existing self-generating devices typically exploit the piezoelectric properties of materials. For example, in 2006, Wang Zhonglin, a professor at the Georgia Institute of Technology in the United States, successfully converted mechanical energy into electrical energy at the nanoscale, and developed the world's smallest generator - a nanogenerator. The fundamental principle of nanogenerators is that when nanowires (NWs) are dynamically stretched under an external force, piezoelectric potentials are generated in the nanowires, and corresponding transient currents flow at both ends to balance the Fermi level. [0003] Ammonia gas se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 叶柏盈
Owner NEWNAGY TANGSHAN