CN110470648A - A kind of combination gas monitoring system identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive - Google Patents
A kind of combination gas monitoring system identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive Download PDFInfo
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- CN110470648A CN110470648A CN201910881669.9A CN201910881669A CN110470648A CN 110470648 A CN110470648 A CN 110470648A CN 201910881669 A CN201910881669 A CN 201910881669A CN 110470648 A CN110470648 A CN 110470648A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles
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Abstract
It is connected based on gas monitoring system associated with Surface enhanced Raman spectroscopy and the identification of electricity air-sensitive, including Raman spectrometer, sensor and processing terminal, the sensor, processing terminal and Raman spectrometer by cable the invention discloses a kind of；The sensor includes the noble metal nano particles and heater-type gas sensor of metal oxide package；When the sensor contacts are to gas to be monitored, apparent electrical response is generated, and response signal is transferred to the processing terminal；It after the processing terminal receives signal, controls the Raman spectrometer and Surface enhanced Raman spectroscopy SERS detection is carried out to gas to be monitored, obtain corresponding Raman spectrum, to realize the accurate real-time monitoring to gas to be monitored.It can fast and efficiently be realized to gas-monitoring using the system.
Description
Technical field
The present invention relates to gas monitoring techniques fields, more particularly to one kind to be based on Surface enhanced Raman spectroscopy and electricity air-sensitive
The combination gas monitoring system of identification.
Background technique
Currently, accurately real-time gas monitoring is of great significance to agricultural production, public safety and space exploration, one
Efficient real-time monitoring has strict requirements to sensor, and these requirements include quick response, high-frequency signal acquisition, height
Recognition capability and high sensitivity etc..Although traditional technology includes optical spectroscopy, mass spectrograph and chromatograph are widely used to spirit
Quick and accurate eudiometry, but they are often used as lab analysis, this is because these technologies need complexity time-consuming
Pre-treatment, and large-scale and precision equipment height is relied on.Therefore these traditional technologies are difficult to realize simple, needs quickly sound
The real-time gas monitoring answered.
Surface enhanced Raman spectroscopy (SERS) technology is expected to realize high-precision and quick gas on-site test, because this
Spectral technique can reflect the unique information of molecular structure, and small-sized Raman spectrometer is flourishing.However it is traditional
SERS is highly suitable for analysis and detection field, but is not suitable for real-time gas monitoring.Such as the SERS of prior art report is former
Bit test is surveyed per at regular intervals, and in addition real time monitoring needs frequent signal acquisition, when SERS for supervising in real time
When control, it should be detected incessantly.However, this uninterrupted detection needs long-term laser output constantly to excite SERS
Spectrum this considerably increases the power consumption of sensor and shortens service life of laser, therefore single SERS technology is also difficult to realize
Monitoring in real time.
Summary of the invention
The object of the present invention is to provide a kind of combination gas prisons identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive
Examining system can fast and efficiently be realized to gas-monitoring using the system.
The purpose of the present invention is what is be achieved through the following technical solutions:
It is a kind of based on Surface enhanced Raman spectroscopy and electricity air-sensitive identification associated with gas monitoring system, the system packet
Include Raman spectrometer, sensor and processing terminal, in which:
The sensor, processing terminal and Raman spectrometer are connected by cable；
The sensor includes the noble metal nano particles and heater-type gas sensor of metal oxide package,
In:
The noble metal nano particles dropwise addition of the metal oxide package forms thin on the heater-type gas sensor
Film, the metal oxide shell in noble metal nano particles which wraps up sense for realizing conductometric type gas,
The strong surface plasmons of internal noble metal nano particles can be known for realizing Surface enhanced Raman spectroscopy SERS
Not；
The main body of the heater-type gas sensor is ceramic tube, and the resistance that two pairs of pins are used to collect the sensor becomes
Change；Pass through heater strip in the ceramic tube inside, by the heater strip input voltage control the sensor
Operating temperature；
When the sensor contacts are to gas to be monitored, apparent electrical response is generated, and response signal is transferred to
The processing terminal；
After the processing terminal receives signal, controls the Raman spectrometer and surface enhanced drawing is carried out to gas to be monitored
Graceful spectrum SERS detection obtains corresponding Raman spectrum displacement, to realize the accurate real-time monitoring to gas to be monitored.
In the noble metal nano particles of metal oxide package:
The thickness control of metal oxide shell is in 0.5-15 nanometers；
The size of internal noble metal nano particles controls in 15-300 nanometers.
The noble metal nano particles dropwise addition of the metal oxide package forms thin on the heater-type gas sensor
Film with a thickness of 0.3-5 microns.
As seen from the above technical solution provided by the invention, it can fast and efficiently be realized to gas using above system
Body monitoring.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the combination gas prison provided in an embodiment of the present invention identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive
Examining system structural schematic diagram；
Fig. 2 is provided the structural schematic diagram of the core component of sensor by the embodiment of the present invention；
Fig. 3 is the schematic diagram of generated electrical response in example of the present invention；
Fig. 4 is the Raman spectrum displacement diagram obtained in example of the present invention；
Fig. 5 is that the nano particle partial enlargement and its function in Sensor core component described in the embodiment of the present invention are illustrated
Figure.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing, is implemented as shown in Figure 1 for the present invention
Example provide based on Surface enhanced Raman spectroscopy and electricity air-sensitive identification associated with gas monitoring system structural schematic diagram, it is described
System mainly includes Raman spectrometer, sensor and processing terminal, in which:
The sensor, processing terminal and Raman spectrometer are connected by cable；
The sensor includes the noble metal nano particles and heater-type gas sensor of metal oxide package, is such as schemed
2 show the structural schematic diagram of the provided sensor of the embodiment of the present invention, with reference to Fig. 2:
The noble metal nano particles dropwise addition of the metal oxide package forms thin on the heater-type gas sensor
Film, the metal oxide shell in noble metal nano particles which wraps up sense for realizing conductometric type gas,
The strong surface plasmons of internal noble metal nano particles can be known for realizing Surface enhanced Raman spectroscopy SERS
Not；In the specific implementation, above-mentioned formation film with a thickness of 0.3-5 microns；
The main body of the heater-type gas sensor is ceramic tube, and the resistance that two pairs of pins are used to collect the sensor becomes
Change；Pass through heater strip in the ceramic tube inside, by the heater strip input voltage control the sensor
Operating temperature；
When the sensor contacts are to gas to be monitored, apparent electrical response is generated, and response signal is transferred to
The processing terminal；For example, sensor contacts are to wait supervise if gas to be monitored is 2 phenylethanethiols (concentration 100ppm)
After surveying gas, the electrical response of generation is as shown in Figure 3；
After the processing terminal receives signal, controls the Raman spectrometer and surface enhanced drawing is carried out to gas to be monitored
Graceful spectrum SERS detection obtains corresponding Raman spectrum displacement, to realize the accurate real-time monitoring to gas to be monitored.Example
Such as, by taking the electrical response of Fig. 3 as an example, it is illustrated in figure 4 Raman spectrum displacement diagram obtained, according to the Fig. 4
Realize the accurate real-time monitoring to 2 phenylethanethiols.
In the specific implementation, the nano particle partial enlargement signal being illustrated in figure 5 in sensor described in the embodiment of the present invention
Figure, in the noble metal nano particles of above-mentioned metal oxide package:
Due to the dimensional effect and near-field effect of SERS, the thickness control of metal oxide shell is in 0.5-15nm；It is interior
The size of portion's noble metal nano particles controls in 15-300nm.
It is worth noting that, the content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field's public affairs
The prior art known.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (3)
1. a kind of based on gas monitoring system associated with Surface enhanced Raman spectroscopy and the identification of electricity air-sensitive, which is characterized in that
The system comprises Raman spectrometer, sensor and processing terminals, in which:
The sensor, processing terminal and Raman spectrometer are connected by cable；
The sensor includes the noble metal nano particles and heater-type gas sensor of metal oxide package, in which:
The noble metal nano particles dropwise addition of the metal oxide package forms film on the heater-type gas sensor, should
Metal oxide shell in the noble metal nano particles of metal oxide package is internal for realizing conductometric type gas sensing
The strong surface plasmons of noble metal nano particles can identify for realizing Surface enhanced Raman spectroscopy SERS；
The main body of the heater-type gas sensor is ceramic tube, and two pairs of pins are used to collect the resistance variations of the sensor；
In the ceramic tube inside pass through a heater strip, by the heater strip input voltage control the work of the sensor
Make temperature；
When the sensor contacts are to gas to be monitored, apparent electrical response is generated, and response signal is transferred to described
Processing terminal；
After the processing terminal receives signal, controls the Raman spectrometer and surface-enhanced Raman light is carried out to gas to be monitored
SERS detection is composed, corresponding Raman spectrum displacement is obtained, to realize the accurate real-time monitoring to gas to be monitored.
2. the gas monitoring system according to claim 1 based on Surface enhanced Raman spectroscopy identification, which is characterized in that in institute
In the noble metal nano particles for stating metal oxide package:
The thickness control of metal oxide shell is in 0.5-15 nanometers；
The size of internal noble metal nano particles controls in 15-300 nanometers.
3. the gas monitoring system according to claim 1 based on Surface enhanced Raman spectroscopy identification, which is characterized in that described
Metal oxide package noble metal nano particles be added dropwise on the heater-type gas sensor formed film with a thickness of
0.3-5 microns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910881669.9A CN110470648A (en) | 2019-09-18 | 2019-09-18 | A kind of combination gas monitoring system identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive |
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| CN201910881669.9A CN110470648A (en) | 2019-09-18 | 2019-09-18 | A kind of combination gas monitoring system identified based on Surface enhanced Raman spectroscopy and electricity air-sensitive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670988A (en) * | 2021-08-11 | 2021-11-19 | 山东智微检测科技有限公司 | Color and conductance dual-mode gas sensing device and preparation and use methods thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502327A (en) * | 2015-01-12 | 2015-04-08 | 华东理工大学 | Method for single particle surface pollutant site quantitative detection based on surface enhanced Raman spectrum |
-
2019
- 2019-09-18 CN CN201910881669.9A patent/CN110470648A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502327A (en) * | 2015-01-12 | 2015-04-08 | 华东理工大学 | Method for single particle surface pollutant site quantitative detection based on surface enhanced Raman spectrum |
Non-Patent Citations (1)
| Title |
|---|
| 鲍皓明: "基于薄层固态转变的表面增强拉曼光谱", 《中国优秀博硕士学位论文全文数据库（博士） 工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670988A (en) * | 2021-08-11 | 2021-11-19 | 山东智微检测科技有限公司 | Color and conductance dual-mode gas sensing device and preparation and use methods thereof |
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Application publication date: 20191119 |