Electric conductivity-cataluminescence double-channel gas sensor, detection device and detection method thereof

A gas sensor and detection device technology, which is applied in the direction of measuring devices, chemiluminescence/bioluminescence, instruments, etc., can solve the problems of insufficient stability of the detection signal of the catalytic luminescence sensor, missed judgment, and the decline of the detection effect of the catalytic luminescence sensor, so as to improve the sensitivity performance, reduce misjudgment, improve sensitivity and response speed

Active Publication Date: 2018-06-22
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the photon release efficiency of the catalytic product is not high, the detection effect of the catalytic luminescence sensor will be greatly reduced, and even missed judgments may occur.
In other words, the detection signal of the catalytic luminescence sensor is not stable enough

Method used

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  • Electric conductivity-cataluminescence double-channel gas sensor, detection device and detection method thereof
  • Electric conductivity-cataluminescence double-channel gas sensor, detection device and detection method thereof
  • Electric conductivity-cataluminescence double-channel gas sensor, detection device and detection method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Firstly, composite metal oxide nanomaterials are prepared as sensitive materials. In this embodiment, ZnO nanosheets are selected as sensitive materials. The specific steps for preparing sensitive materials are omitted, and no actual improvement is made here.

[0061] Then, prepare the conductance-catalysis luminescence dual-channel gas sensor, the steps are as follows:

[0062] Step 1-1-1, disperse the ZnO nanosheets in ethanol to form a suspension, and use the spin coating technology to coat the sol on the SiO2 / Si substrate with platinum microelectrodes printed on the front, and dry it in the air. Brush a layer of ruthenium paste on the back of the substrate as a heating layer, and install electrodes and thermocouples to make sensitive elements;

[0063] Step 1-1-2, place the BPCL weak luminescence analyzer at the corresponding position near the substrate, and install the sensor housing.

[0064] Finally, the conductance-catalysis-luminescence dual-channel gas detect...

Embodiment 2

[0072] First, composite metal oxide nanomaterials are prepared as sensitive materials. In this embodiment, a variety of metal oxide nanomaterials are selected to prepare six sensitive elements to form a sensor array. The specific steps for preparing sensitive materials refer to Embodiment 1.

[0073] Then, prepare the conductance-catalysis luminescence sensor array, the steps are as follows:

[0074] Step 2-1-1, disperse the various metal oxide nanomaterials prepared in the previous step in ethanol to form a suspension, and use the spin coating technology to coat the sol on six pieces of SiO2 with platinum microelectrodes printed on the front. On the / Si substrate, after drying in the air, brush a layer of ruthenium paste on the back of each substrate as a heating layer, and install electrodes and thermocouples to make multiple sensitive elements;

[0075] Step 2-1-2, install the six sensitive elements prepared in step 1 on the sensor array board as shown in Figure 3, install...

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Abstract

The invention discloses an electric conductivity-cataluminescence double-channel gas sensor for a volatile organic compound, a detection device and a detection method thereof. The sensor comprises a sensitive element, a sensitive layer and a heating layer, wherein the sensitive element is sensitive to gases and is capable of simultaneously generating corresponding electric conductivity signals andlight emission signals at different temperatures; the sensitive element at least comprises a substrate; the sensitive layer is deposited on the substrate; the sensitive layer comprises a nano sensitive material; the nano sensitive material is sensitive to gases and is capable of simultaneously generating electric conductivity signals and light emission signals; and the heating layer is used for changing temperatures of the substrates and the sensitive layer. The detection device comprises the sensor and a signal detection module for detecting the electric conductivity signals and the light emission signals. By adopting the sensor, the detection selectivity for volatile organic compounds is improved, judgment errors and judgment omission rates can be greatly reduced, the sensitivity of thesensor is improved, and the response speed of the sensor is also increased.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a gas sensor for volatile organic compounds, a detection device and a detection method thereof. Background technique [0002] Semiconductor gas sensors have the advantages of stable signal, fast response time, low price, and suitable for on-site detection, etc., and are widely used in the rapid detection and identification of chemicals such as volatile organic compounds. The traditional semiconductor gas sensor uses the principle of conductivity detection. At present, the use of nanostructured metal oxides as sensitive materials can greatly improve the sensitivity of the sensor. For example, in the article Enhanced acetone sensing performances of hierarchical hollowAu-loaded NiO hybrid structures, Sensors and Actuators B: Chemical, Volume 161, Issue 1, 2012, Pages 178-183, Zhang Tong et al. used NiO as a sensitive material to realize the conductivity detection of acetone ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76
CPCG01N21/766
Inventor 孟凡利常源隆赵勇胡海峰张亚男
Owner NORTHEASTERN UNIV
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