KR102553321B1 - Toxic gas monitoring system including glass-integrated gas sensor, and toxic gas monitoring method using the same - Google Patents

Abstract

The present invention discloses a toxic gas monitoring system including a glass-integrated gas sensor capable of detecting the concentration of toxic gas in real time, and a monitoring method using the same.
A toxic gas monitoring system according to the present invention includes a toxic gas detection unit for detecting toxic gas; a meter for receiving information on the detected toxic gas and transmitting the received information to a server using wireless communication; and a server that monitors the transmitted information and analyzes the concentration of toxic gas, wherein the toxic gas detection unit includes a glass-integrated gas sensor, and the glass-integrated gas sensor includes a substrate; Glass disposed on the substrate and including a fluorescent or color-changing material; and noble metal catalytic nanoparticles including platinum (Pt) and palladium (Pd).

Description

A toxic gas monitoring system including a glass-integrated gas sensor and a toxic gas monitoring method using the same

The present invention relates to a toxic gas monitoring system including a glass-integrated gas sensor and a toxic gas monitoring method using the same.

Exhaust gas emitted from overall industrial sites such as chemical plants, incineration plants, and various manufacturing facilities not only seriously affects the human body, but also has a serious adverse effect on the national image along with environmental pollution such as acid rain, smog, and plant death.

For this reason, the types of hazardous substances among chimney exhaust gas are regulated not only domestically but also globally, and the permissible emission concentration for each substance is regulated and managed by law.

For the management and regulation of chimney exhaust gas, a measurement system capable of measuring the concentration of pollutants is essential.

An electrochemical gas sensor is mainly used as a gas detection sensor for detecting toxic gas.

Electrochemical gas sensors are most commonly used as gas sensors for detecting toxic gases because of their excellent responsiveness, detection sensitivity, selectivity of detection gas, and reproducibility.

However, electrochemical gas sensors require high-temperature operation and are sensitive to external environments such as humidity, so their use is limited.

In addition, since the gas sensor is a bulky box-type sensing element by integrating the gas sensor on a plastic PCB substrate, there is a problem in that a separate installation place is required, such as on an inner wall of a building.

An object of the present invention is to provide a monitoring system capable of detecting the concentration of toxic gas in real time and a monitoring method using the same.

Another object of the present invention is to provide a monitoring system with improved convenience and a monitoring method using the same, as the monitoring system is connected to a portable electronic device so that an observer can check information on toxic gas in real time.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

A toxic gas monitoring system according to the present invention includes a toxic gas detection unit for detecting toxic gas; a meter for receiving information on the detected toxic gas and transmitting the received information to a server using wireless communication; and a server that monitors the transmitted information and analyzes the concentration of toxic gas, wherein the toxic gas detection unit includes a glass-integrated gas sensor, and the glass-integrated gas sensor includes a substrate; Glass disposed on the substrate and including a fluorescent or color-changing material; and noble metal catalyst nanoparticles disposed on the glass and containing platinum (Pt) and palladium (Pd).

The glass may include 1 to 90 parts by weight of a fluorescent or discoloring material based on 100 parts by weight of the glass.

Based on 100 parts by weight of the glass, 1 to 30 parts by weight of IGZO may be further included.

The glass may include at least one of silicate glass, aluminum silicate glass, aluminum borosilicate glass, aluminate glass, sodium calcium glass, and quartz glass.

The glass may be in the form of a sheet.

The fluorescent or discoloring material may include one or more of Tb ⁴⁺ , Ce ⁴⁺ and Eu ³⁺ .

In the glass-integrated gas sensor, 70% by weight or more of 100% by weight of IGZO included in the glass may be located within an upper 50% in a thickness direction of the glass.

The wireless communication may include any one of Wi-fi, Bluetooth, Code Division Multiple Access (CDMA), Ultra Wide Band (UWB), and Zigbee.

The meter may include a first communication unit wirelessly communicating with the toxic gas detector and a second communication unit wirelessly communicating with the server.

The first communication unit may include a 2-3 GHz antenna.

The second communication unit may include a CDMA antenna or a WLAN antenna.

The server may include an alarm unit generating an alarm when the concentration of the analyzed toxic gas is high based on the standard concentration.

A toxic gas monitoring method according to the present invention includes the steps of (a) detecting toxic gas in a toxic gas detector; (b) using wireless communication, receiving information on the toxic gas detected by a measuring instrument and transmitting the received information to a server; and (c) analyzing the concentration of toxic gas by monitoring the transmitted information in a server, wherein the toxic gas detection unit includes a glass-integrated gas sensor, and the glass-integrated gas sensor includes a substrate; Glass disposed on the substrate and including a fluorescent or color-changing material; and noble metal catalyst nanoparticles disposed on the glass and containing platinum (Pt) and palladium (Pd).

When the toxic gas detection units are arranged in plurality at regular intervals, the diffusion direction of the toxic gas can be detected through the location of the toxic gas detection units.

The glass-integrated gas sensor may detect toxic gas using glass containing 1 to 90 parts by weight of a fluorescent or discoloring material based on 100 parts by weight of the glass.

Based on 100 parts by weight of the glass, 1 to 30 parts by weight of IGZO may be further included.

The glass may include at least one of silicate glass, aluminum silicate glass, aluminum borosilicate glass, aluminate glass, sodium calcium glass, and quartz glass.

The fluorescent or discoloring material may include one or more of Tb ⁴⁺ , Ce ⁴⁺ and Eu ³⁺ .

The glass-integrated gas sensor may detect toxic gas by using glass in which 70% by weight or more of 100% by weight of IGZO is located within the upper 50% in the thickness direction of the glass.

In the step (b), wireless communication including any one of Wi-fi, Bluetooth, Code Division Multiple Access (CDMA), Ultra Wide Band (UWB) and Zigbee may be used. .

The meter may wirelessly communicate with the toxic gas detector using the first communication unit, and may wirelessly communicate with the server using the second communication unit.

The first communication unit may include a 2-3 GHz antenna.

The second communication unit may include a CDMA antenna or a WLAN antenna.

In the step (c), if the concentration of the analyzed toxic gas is high based on the standard concentration, an alarm may be generated in an alarm unit included in the server.

The monitoring system and the monitoring method using the same according to the present invention can detect the concentration of toxic gas in real time.

In addition, there is an effect of excellent detection sensitivity of hydrogen gas at room temperature.

In addition, as the monitoring system is connected to a portable electronic device, an observer can check information on toxic gas in real time, thereby improving convenience.

In addition, it is possible to check the concentration of toxic gas at each location of a plurality of toxic gas detectors installed around an industrial complex, and detect the diffusion direction of the toxic gas through the location information of the toxic gas detector.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a configuration diagram showing a toxic gas monitoring system according to the present invention.
2 is a cross-sectional view of a glass-integrated gas sensor according to the present invention.
3 is a plan view of a glass-integrated gas sensor according to the present invention.
4 is a cross-sectional view of a glass-integrated gas sensor in which 70% by weight or more of 100% by weight of IGZO is located within the upper 50% in the thickness direction of the glass according to the present invention.
5 is a plan view of a glass-integrated gas sensor in which 70% by weight or more of 100% by weight of IGZO is located within the upper 50% in the thickness direction of the glass according to the present invention.
6 is a flow chart showing a method for monitoring toxic gases according to the present invention.

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components may be "interposed" between each component. ", or each component may be "connected", "coupled" or "connected" through other components.

Hereinafter, a toxic gas monitoring system including a glass-integrated gas sensor according to some embodiments of the present invention and a toxic gas monitoring method using the same will be described.

1 is a configuration diagram showing a toxic gas monitoring system according to the present invention.

Referring to Figure 1, the toxic gas monitoring system of the present invention includes a toxic gas detector, a meter and a server.

The toxic gas detection unit detects toxic gas generated in industrial facility environments such as factories and power plants.

The meter uses wireless communication to receive the detected toxic gas information and transmits the received information to the server.

The server analyzes the concentration of toxic gas by monitoring the transmitted information.

In the present invention, the toxic gas includes basic gas, acid gas, organic gas, and the like.

The basic gas may include one or more of ammonia gas (NH3), amines, and NMP.

The acid gas may include one or more of HF, HCl, HBr, HNO ₃ , H ₃ PO ₄ , H ₂ SO ₄ , CH ₃ COOH, HCOOH, and organic acids.

The organic gas may include one or more of volatile organic compounds, non-volatile organic compounds, DOP, DBP, BHT, TEP, HMDS, Siloxanes, and Silanols.

2 is a cross-sectional view of a glass-integrated gas sensor according to the present invention, and FIG. 3 is a plan view of FIG. 2 .

Referring to Figures 2 and 3, the toxic gas detection unit includes a glass-integrated gas sensor.

The glass-integrated gas sensor includes a substrate 10, glass 20 disposed on the substrate and including a fluorescent or discoloring material 30, and disposed on the glass and including platinum (Pt) and palladium (Pd). noble metal catalytic nanoparticles (40).

The substrate 10 may include various materials ranging from a flexible substrate made of polyimide to a glass substrate.

Preferably, the substrate 10 needs to have a structure that firmly fixes the glass, and it is preferable to integrate the substrate and the glass. In the case of using a glass substrate, it may be formed by integrating glass with a window glass.

The glass 20 is a gas sensitive layer and may be in the form of a sheet. Glass in the form of a sheet may be formed by mixing a glass material such as silicate glass and a fluorescent or discoloring material with a volatile solvent, forming a slurry, and then drying the glass material.

The glass 20 may include one or more of silicate glass, aluminum silicate glass, aluminum borosilicate glass, aluminate glass, sodium calcium glass, and quartz glass.

Glass formed of these materials can improve mechanical strength, durability and transparency.

The fluorescent or color-changing material 30 may change its light-emitting characteristics as the electrons of light-emitting ions are changed by reaction with toxic gas.

When oxygen-deficient carbon monoxide (CO) contacts a fluorescent or color-changing material, it can absorb oxygen from the fluorescent or color-changing material and be oxidized to carbon dioxide (CO ₂ ). As a result, Tb ⁴⁺ , which is a light emitting ion contained in a fluorescent or discoloring material, can be reduced to Tb ³⁺ .

As the electrons of the light emitting ions contained in the fluorescent or discoloring material change due to the reaction with the toxic gas, the light emitting characteristics may change.

In addition, the presence or absence of contact with toxic gas can be detected by the change in the light emitting characteristics.

The fluorescent or color-changing material 30 may include at least one of Tb ⁴⁺ , Ce ⁴⁺ and Eu ³⁺ .

In the case of Tb ⁴⁺ , green emission may be exhibited as Tb ⁴⁺ is reduced to Tb ³⁺ by reaction with toxic gas. The degree of leakage of toxic gas can be confirmed by the increase in luminous efficiency according to the increase in the concentration of Tb ³⁺ .

In the case of Ce ⁴⁺ , as it is reduced from Ce ⁴⁺ to Ce ³⁺ by reaction with toxic gas, its luminescence characteristics may appear different from those of the parent crystal. Since the reduced amount varies depending on the oxygen deficiency concentration, the emission color may be changed accordingly.

In the case of Eu ³⁺ , it can be reduced from Eu ³⁺ to Eu ²⁺ by reaction with toxic gas. The concentration of toxic gas can be sensed by the degree of change in luminescent color according to the lack of oxygen in the mother crystal due to the reduction reaction.

The fluorescent or color-changing material 30 may include two or more light-emitting ions such as Tb-Ce, Tb-Eu, and Ce-Eu. When a material containing two or more kinds of luminescent ions is used, the luminescent color changes due to the concentration change according to the difference in reducibility.

The concentration of the toxic gas can be detected by detecting the change in the luminous color and discoloration.

The structural change of the matrix crystal is progressed by the reaction of the fluorescent or color-changing material with the toxic gas, and accordingly, the luminous color may be lost, and the concentration of the toxic gas can be sensed to the extent of this conversion.

The fluorescent or color-changing material 30 may have a powder size of 10 nm to 1000 nm.

When the size of the fluorescent or color-changing material 30 is formed to be nano-sized, the luminous efficiency can be improved due to the characteristics of the nano-phosphor or nano-color-changing material having a uniform particle size and a spherical shape.

As such, the process of forming nano-sized phosphor and discoloration powder can be implemented by various known methods such as a solid phase reaction method and a co-precipitation method.

On the other hand, hydrogen (H ₂ ) is one of the renewable energy resources used in various fields such as petroleum refining industry and fuel cells. Since hydrogen has a risk of ignition or explosion when combined with air in a concentration range of 4 to 75%, the importance of hydrogen detection for safety is very great. In addition, since hydrogen is a colorless gas and difficult to detect by human senses, accurate detection of hydrogen at 500 ppm or less is necessary for storage, use, and safe transportation.

In general, metal oxides are relatively inactive because of their large band gaps. Gas sensors containing metal oxides require an operating temperature of 300° C. or higher to enable surface oxidation reactions.

Accordingly, there is a disadvantage in that a high temperature is required to detect hydrogen gas among toxic gases even at room temperature.

The glass-integrated gas sensor of the present invention has a structure in which precious metal catalyst nanoparticles including platinum (Pt) and palladium (Pd) are dispersed and coated on the surface of the glass, and reacts with chemically adsorbed oxygen even at room temperature, resulting in low concentration at room temperature. There is an advantageous effect in detecting hydrogen of.

Specifically, a small amount of IGZO 50 having excellent electrical conductivity is further included in the glass, and noble metal catalyst nanoparticles 40 including platinum (Pt) and palladium (Pd) are disposed on the upper surface of the glass 20. Accordingly, when Pd reacts with hydrogen gas, palladium hydride (PdH _x ) is formed, and palladium hydride (PdH _x ) reacts with chemically adsorbed oxygen even at room temperature without any heat treatment to detect hydrogen.

Therefore, there is an effect of excellent detection sensitivity of hydrogen gas even at low temperature.

In particular, in order to further improve the detection sensitivity of toxic gas and hydrogen gas, it is preferable to include IGZO in the form of nanofibers rather than powder form.

IGZO nanofibers may have a length of 200 to 1000 nm and a diameter of 10 to 100 nm.

In addition, the surface area of the IGZO nanofibers can be further increased by including pores on the surface. The porosity of the IGZO nanofibers may be 10-40%.

By satisfying the length, diameter range and porosity of the IGZO nanofibers, it is possible to exhibit excellent detection performance of toxic gases despite containing a small amount of IGZO.

The glass 20 may include 1 to 90 parts by weight of a fluorescent or discoloring material based on 100 parts by weight of glass such as silicate glass. And, based on 100 parts by weight of glass such as silicate glass, 1 to 30 parts by weight of IGZO may be further included.

The glass-integrated gas sensor contains glass such as silicate glass as a main component and contains 1 to 90 parts by weight of a fluorescent or discoloring material, so that it can check whether or not toxic gas is in contact with light emitting characteristics and discoloration characteristics, and Depending on the degree of characteristic change, the concentration of toxic gas can be confirmed.

In addition, the glass-integrated gas sensor includes glass as a main component and further includes 1 to 30 parts by weight of IGZO, thereby having an effect of facilitating detection of toxic gas.

In addition, the glass-integrated gas sensor includes 1 to 10 parts by weight of noble metal catalyst nanoparticles including platinum (Pt) and palladium (Pd) with respect to 100 parts by weight of glass, so that hydrogen gas can be easily detected.

As shown in Figures 4 and 5, in order to improve the detection sensitivity of toxic gas and especially hydrogen gas, the glass-integrated gas sensor has more than 70% by weight of 100% by weight of IGZO included in the glass in the thickness direction of the glass can be located within the upper 50%.

That is, most of IGZO (50) is present in the upper layer, and noble metal catalyst nanoparticles including platinum (Pt) and palladium (Pd) are dispersed in a position close to IGZO (50), so oxygen chemically adsorbed even at room temperature Since it reacts with, there is an effect of excellent hydrogen gas detection sensitivity at room temperature.

Each of the Pt nanoparticles and the Pd nanoparticles may have a size of approximately 1 to 20 nm, preferably 1 to 10 nm, but is not limited thereto.

In the glass-integrated gas sensor, a heating sheet (not shown) may be further disposed between the substrate 10 and the glass 20 .

As the temperature of the glass 20 increases, the reactivity with toxic gas increases.

Therefore, when the heating sheet is used, the reactivity between the fluorescent or discolored material 30 and the toxic gas can be improved. The heating sheet may be in the form of a coil that converts electrical energy into thermal energy, and may be included in a variety of forms as long as it can transfer heat to the fluorescent or discoloring material 30 .

Additionally, sensor electrodes may be disposed on the surface of the glass. As the sensor electrode is disposed, the concentration of the toxic gas can be more accurately confirmed by monitoring the change in sensor resistance.

The sensor electrode is made of gold (Au), beryllium (Be), bismuth (Bi), cobalt (Co), copper (Cu), hafnium (Hf), indium (In), manganese (Mn), molybdenum (Mo), nickel (Ni), lead (Pb), platinum (Pt), rhodium (Rh), rhenium (Re), ruthenium (Ru), tantalum (Ta), tellium (Te), titanium (Ti), tungsten (W), zinc At least one of (Zn) and zirconium (Zr) may be included.

The meter uses wireless communication to receive the detected toxic gas information and transmits the received information to the server.

Reliability of information transmission can be improved by using wireless communication when the size of the industrial complex and the volume of load facilities are large. Accordingly, errors in information can be reduced, and information can be stably collected and stored.

The wireless communication is any one of Wi-fi, Bluetooth, code division multiple access (CDMA), ultra-wide band (UWB), and Zigbee, which are long-distance wireless methods using the Internet network. can include

The meter may include a first communication unit that wirelessly communicates with the toxic gas detector and a second communication unit that wirelessly communicates with the server.

The first communication unit and the second communication unit are components in charge of transmission and reception, and the first communication unit may include an antenna of 2 to 3 GHz.

The second communication unit may include a CDMA antenna or a WLAN antenna.

The server analyzes the concentration of toxic gas by monitoring the transmitted information.

A standard concentration (set value) is stored in the server, and the concentration of the toxic gas detected based on the standard concentration is compared and displayed.

When the change in emission color detected by the toxic gas detector is transmitted to the server through the meter, the concentration of toxic gas according to the emission color is displayed on the server.

In addition, when the change in the resistance of the gas sensor is transmitted to the server through the measuring device through the electrode disposed in the toxic gas detection unit, the concentration of the toxic gas according to the change in the resistance of the gas sensor is displayed on the server. When the change in the light emission color and the change in resistance are simultaneously used, there is an effect of more accurately measuring the concentration of the toxic gas.

The server may include an alarm unit generating an alarm when the concentration of the analyzed toxic gas is high based on the standard concentration.

For example, assume that the standard concentration stored in the server is 0.1 ppm (v/v) or less.

If the toxic gas concentration detected by the glass-integrated gas sensor is 0.05ppm (v/v), it is displayed as 0.05ppm (v/v) on the screen connected to the server.

On the other hand, when the toxic gas concentration detected by the glass-integrated gas sensor is 0.8 ppm (v/v), an alarm may be generated through the alarm unit to recognize the occurrence of an abnormal situation.

Through this, an external manager can quickly check the concentration of toxic gas and stop the manufacturing process or close the door where the contamination level is high, thereby preventing the spread of toxic gas.

The toxic gas monitoring system of the present invention may further include a power supply unit for supplying power to a toxic gas detector, a measuring instrument, and a server.

The power supply unit is configured in the form of a battery.

In the toxic gas monitoring system of the present invention, a positioning device such as a GPS may be disposed on the substrate of the toxic gas sensing unit. In addition, when a plurality of toxic gas detectors having the positioning device are disposed at regular intervals, the concentration of toxic gas can be checked at each position of the toxic gas detector.

In addition, the diffusion direction of the toxic gas can be detected through the location information of the toxic gas detection unit.

For example, it is assumed that there is a first toxic gas detection unit at a first location and a second toxic gas detection unit at a second location 2m away from the first location.

If the concentration of toxic gas detected by the first toxic gas detector is 3 ppm and the concentration of toxic gas detected by the second toxic gas detector is 10 ppm, the concentration of toxic gas at the first and second positions can be checked. there is. In addition, it can be expected that the toxic gas is spreading from the second location to the first location.

The server may be connected to a portable electronic device. As the server is connected to a portable electronic device, the observer can check the concentration of toxic gas in real time while moving.

Accordingly, the convenience of toxic gas management can be increased.

As such, using the toxic gas monitoring system of the present invention, the concentration of toxic gas in the air can be monitored in real time. In addition, it is possible to check the existence of toxic gases inside process facilities that are difficult for people to enter.

In addition, as the toxic gas monitoring system of the present invention is connected to a portable electronic device, the observer can check information on the toxic gas in real time, thereby improving convenience.

6 is a flow chart showing a method for monitoring toxic gases according to the present invention.

Referring to FIG. 6, the method for monitoring toxic gas according to the present invention includes the step of detecting toxic gas in a toxic gas detector (S110), receiving information on the detected toxic gas from a measuring instrument using wireless communication, Transmitting the received information to the server (S120), and analyzing the concentration of toxic gas by monitoring the transmitted information in the server (S130).

First, the toxic gas generated in the industrial facility is detected by the toxic gas detector.

The toxic gas detection unit includes a glass-integrated gas sensor.

Contact with toxic gas can be confirmed by the change in light emitting characteristics of the glass-integrated gas sensor.

In addition, the concentration of toxic gas can be more accurately measured according to the degree of change in luminescence characteristics, discoloration characteristics, and resistance changes.

Details of the glass, the fluorescent or discoloring material, and IGZO are as described above.

As described above, the glass-integrated gas sensor has an effect of improving the sensing performance of hydrogen gas by using glass in which 70% by weight or more of 100% by weight of IGZO is located within the upper 50% in the thickness direction of the glass.

Then, using wireless communication including any one of Wi-fi, Bluetooth, CDMA, Ultra Wide Band (UWB), and Zigbee, the sensed Toxic gas information is received and the received information is transmitted to the server.

The meter may wirelessly communicate with the toxic gas detector using the first communication unit, and may wirelessly communicate with the server using the second communication unit.

Subsequently, the server analyzes the concentration of toxic gas by monitoring the transmitted information.

When the change in emission color detected by the toxic gas detector is transmitted to the server through the meter, the concentration of toxic gas according to the emission color is displayed on the server.

Then, when the resistance change of the gas sensor is transmitted to the server through the measuring device through the electrode disposed in the toxic gas detection unit, the toxic gas concentration according to the resistance change of the gas sensor is displayed on the server.

When the change in the light emission color and the change in resistance are simultaneously used, there is an effect of more accurately measuring the concentration of the toxic gas.

At this time, based on the standard concentration stored in the server, if the concentration of the toxic gas detected is high, an alarm unit included in the server may generate an alarm.

The server is connected to a portable electronic device, so that the observer can check the concentration of toxic gas in real time while moving.

Accordingly, the convenience of toxic gas management can be increased.

When a plurality of toxic gas detectors are arranged at regular intervals, a positioning device such as a GPS may be disposed on a substrate of the toxic gas detector.

Accordingly, it is possible to check the concentration of the toxic gas at each location of the toxic gas detection unit and detect the diffusion direction of the toxic gas through the location information of the toxic gas detection unit.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: Substrate
20 : Glass
30: fluorescent or discoloration material
40: precious metal catalytic nanoparticles containing platinum (Pt) and palladium (Pd)
50: IGZO

Claims (22)

Toxic gas detection unit for detecting toxic gas;
a meter for receiving information on the detected toxic gas and transmitting the received information to a server using wireless communication; and
A server that monitors the transmitted information and analyzes the concentration of toxic gases;
The toxic gas detection unit includes a glass-integrated gas sensor,
The glass-integrated gas sensor
Board;
glass disposed on the substrate, including a fluorescent or discoloring material, and including IGZO nanofibers; and
A noble metal catalyst nanoparticle disposed on the glass and containing platinum (Pt) and palladium (Pd);
When a positioning device is disposed on the board, and a plurality of toxic gas detectors having the positioning device are disposed at regular intervals, the concentration of toxic gas is checked at each location of the toxic gas detector, and location information of the toxic gas detector is obtained. detects the diffusion direction of toxic gas through
70% by weight or more of 100% by weight of the IGZO nanofibers included in the glass are located within the upper 50% in the thickness direction of the glass,
The length of the IGZO nanofibers is 200 ~ 1000 nm, the diameter is 10 ~ 100 nm, the IGZO nanofibers contain pores on the surface,
Based on 100 parts by weight of the glass, 1 to 10 parts by weight of noble metal catalyst nanoparticles are included,
The server includes an alarm unit for generating an alarm when the concentration of the analyzed toxic gas is high based on the standard concentration, the toxic gas monitoring system.
According to claim 1,
Glass containing the fluorescent or discoloring material
A toxic gas monitoring system comprising 1 to 90 parts by weight of a fluorescent or discoloring material based on 100 parts by weight of the glass.
According to claim 1,
Glass containing the fluorescent or discoloring material
Toxic gas monitoring system further comprising 1 to 30 parts by weight of IGZO with respect to 100 parts by weight of the glass.
According to claim 1,
The glass is a toxic gas monitoring system comprising at least one of silicate glass, aluminum silicate glass, aluminum borosilicate glass, aluminate glass, sodium calcium glass and quartz glass.
According to claim 1,
The glass is a toxic gas monitoring system in the form of a sheet.
According to claim 1,
The fluorescent or discoloring material is Tb ⁴⁺ , Ce ⁴⁺ and Eu ³⁺ monitoring system for toxic gases containing one or more.
According to claim 1,
The wireless communication is a toxic gas monitoring system including any one of Wi-fi, Bluetooth, code division multiple access (CDMA), ultra-wide band (UWB) and Zigbee.
According to claim 1,
The meter includes a first communication unit wirelessly communicating with the toxic gas detection unit and a second communication unit wirelessly communicating with the server.
According to claim 8,
The first communication unit includes an antenna of 2 to 3 GHz,
The second communication unit toxic gas monitoring system including a CDMA antenna or a WLAN antenna.
(a) detecting toxic gas in a toxic gas detection unit;
(b) using wireless communication, receiving information on the toxic gas detected by a measuring instrument and transmitting the received information to a server; and
(c) analyzing the concentration of toxic gas by monitoring the transmitted information in the server; including,
The toxic gas detection unit includes a glass-integrated gas sensor,
The glass-integrated gas sensor
Board;
glass disposed on the substrate, including a fluorescent or discoloring material, and including IGZO nanofibers; and
A noble metal catalyst nanoparticle disposed on the glass and containing platinum (Pt) and palladium (Pd);
When a positioning device is disposed on the board, and a plurality of toxic gas detectors having the positioning device are disposed at regular intervals, the concentration of toxic gas is checked at each location of the toxic gas detector, and location information of the toxic gas detector is obtained. detects the diffusion direction of toxic gas through
70% by weight or more of 100% by weight of the IGZO nanofibers included in the glass are located within the upper 50% in the thickness direction of the glass,
The length of the IGZO nanofibers is 200 ~ 1000 nm, the diameter is 10 ~ 100 nm, the IGZO nanofibers contain pores on the surface,
Based on 100 parts by weight of the glass, 1 to 10 parts by weight of noble metal catalyst nanoparticles are included,
Wherein the server includes an alarm unit for generating an alarm when the concentration of the analyzed toxic gas is high based on the standard concentration.
According to claim 10,
The glass-integrated gas sensor
Toxic gas monitoring method for detecting toxic gas using a glass containing 1 to 90 parts by weight of a fluorescent or discoloring material with respect to 100 parts by weight of the glass.
According to claim 10,
The glass-integrated gas sensor
Toxic gas monitoring method further comprising 1 to 30 parts by weight of IGZO with respect to 100 parts by weight of the glass.
According to claim 10,
The glass is a toxic gas monitoring method comprising at least one of silicate glass, aluminum silicate glass, aluminum borosilicate glass, aluminate glass, sodium calcium glass and quartz glass.
According to claim 10,
The fluorescent or discolored material is Tb ⁴⁺ , Ce ⁴⁺ and Eu ³⁺ A method for monitoring toxic gases containing one or more of them.
According to claim 10,
In the step (b), toxic gas using wireless communication including any one of Wi-fi, Bluetooth, CDMA, Ultra Wide Band (UWB) and Zigbee monitoring method.
According to claim 10,
Using the first communication unit, the meter wirelessly communicates with the toxic gas detection unit,
Using the second communication unit, the meter wirelessly communicates with the server toxic gas monitoring method.
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