In-situ infrared reaction tank

Abstract

The utility model provides an in-situ infrared reaction tank which comprises a cavity, a detachable front cover, a rear cover, a sample support, a heating piece, a first infrared window piece, a second infrared window piece and a sample loading infrared window piece, the front end of the cavity is connected with the detachable front cover in a clamped mode, and the rear end of the cavity is fixedly connected with the rear cover; the sample bracket is detachably connected with the sample loading infrared window sheet and is detachably connected into the chamber, and the heating sheet is arranged at the rear end of the sample bracket; the front end of the detachable front cover is detachably connected with a first infrared window sheet, and the rear cover is detachably connected with a second infrared window sheet; one side wall of the cavity is provided with an air inlet, the other side wall of the cavity is provided with an air outlet, the cavity is further provided with a wire inlet used for being connected with a heating sheet, and the front end of the cavity is provided with an inclined light source irradiation opening; the structure is compact, size is small and cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of in-situ characterization devices, in particular to an in-situ infrared gas-solid reaction cell. BACKGROUND

[0002] Olfaction is essential for human survival, life and enjoyment. Therefore, the realization of strong artificial olfaction (or electronic nose) that can replace or surpass human olfaction is attracting more and more attention. Gas sensors are the basis of artificial olfaction technology and are widely used in industries, environments, drug suppression and medical fields. The main research direction is to achieve high sensitivity to low concentration of specific gas by changing the physical and chemical properties of nanomaterials. Understanding the chemical reaction mechanism between sensing materials and target gases is crucial for both material design and in-depth understanding of multi-gas recognition process. Most of the sensing materials need to be thermally or photo-activated to produce corresponding active substances, so as to react with target gases.

[0003] Spectroscopy is an important means to study the properties of matter and chemical reactions. Infrared spectroscopy can provide information on molecular vibration and rotational energy levels, thus revealing the dynamic changes of molecular structure during chemical reactions. The infrared in-situ reaction cell is based on this principle, which realizes the in-situ tracking of the reaction process by real-time monitoring of the absorption or emission characteristics of reactants and products in the infrared spectral region.

[0004] Currently, the study of gas sensing mechanism mainly uses commercial in-situ diffuse reflectance infrared devices, which generally include a diffuse reflectance accessory, an in-situ cell, a vacuum system, a gas source, a purification and pressure device. The system is relatively complex, which increases the difficulty of equipment maintenance and operation. Moreover, due to the complexity and high precision requirements of the equipment, the cost of the diffuse reflectance in-situ infrared spectrometer is relatively high, making it difficult to popularize on a large scale. In addition, the diffuse reflectance signal is relatively weak compared to the transmission signal, which may affect the sensitivity and accuracy of detection. CONTENT OF THE INVENTION

[0005] The present application provides an in-situ infrared reaction cell to provide an in-situ infrared gas-solid reaction cell with simple structure, low cost and easy popularization. The technical solution of the present application is as follows:

[0006] The embodiment of the application provides an in-situ infrared reaction cell, which comprises a chamber, a detachable front cover, a rear cover, a sample support, a heating sheet, a first infrared window sheet, a second infrared window sheet and a sample-loaded infrared window sheet, the front end of the chamber is connected with the detachable front cover, and the rear end of the chamber is fixedly connected with the rear cover; the sample support is detachably connected with the sample-loaded infrared window sheet, the sample support is detachably connected in the chamber, and the heating sheet is arranged at the rear end of the sample support; the front end of the detachable front cover is detachably connected with the first infrared window sheet, and the rear cover is detachably connected with the second infrared window sheet; one side wall of the chamber is provided with an air inlet, the other side wall of the chamber is provided with an air outlet, the chamber is further provided with a wire inlet for connecting the heating sheet, and the front end of the chamber is provided with an inclined light source irradiation opening.

[0007] In some implementations, the front end of the chamber is provided with two inclined light source irradiation openings, and the two light source irradiation openings are respectively 120 degrees from the top end and the low end of the chamber.

[0008] In some implementations, the heating sheet is a hollow ring.

[0009] In some implementations, the sample support is provided with an arc-shaped groove for fixing the sample-loaded infrared window sheet.

[0010] In some implementations, the heating sheet is bonded to the outside of the arc-shaped groove through a high-temperature-resistant adhesive tape.

[0011] In some implementations, valves are installed at the air inlet and the air outlet.

[0012] In some implementations, the rear cover is a rectangular structure, two long sides of the rectangular structure are provided with guide rails, and the chamber and the rear cover are integrally formed.

[0013] In some implementations, the centers of the first infrared window sheet, the sample-loaded infrared window sheet, the heating sheet and the second infrared window sheet are on a horizontal line.

[0014] In some implementations, the materials of the detachable front cover, the chamber, the sample support and the rear cover are all transparent quartz, the material of the heating sheet is ceramic, and the materials of the sample-loaded infrared window sheet, the first infrared window sheet and the second infrared window sheet are one of potassium bromide, calcium fluoride, barium fluoride and zinc selenide.

[0015] In some implementations, the first infrared window sheet is attached to the clamping groove at the front end of the detachable front cover through sealing glue, the clamping groove at the rear end of the detachable front cover is attached to the chamber through sealing glue, and the second infrared window sheet is attached to the clamping groove of the rear cover through sealing glue.

[0016] The technical scheme provided by the embodiment of the application brings at least the following beneficial effects:

[0017] The structure is compact, small in size, low in cost, convenient to use on a conventional infrared analysis support, uniform in gas concentration in the reaction pool, obvious in infrared signal, less in interference, and the two light source irradiation openings ensure light intensity, thereby being suitable for an in-situ infrared gas-solid reaction pool of a light / heat activation system.

[0018] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the application, and together with the specification serve to explain the principles of the application, and do not constitute an improper limitation on the application.

[0020] Figure 1 is an exploded view of an in-situ infrared reaction pool according to an exemplary embodiment.

[0021] Figure 2 is a perspective view of an in-situ infrared reaction pool according to an exemplary embodiment.

[0022] Figure 3 is a side view of an in-situ infrared reaction pool according to an exemplary embodiment.

[0023] Figure 4 is a front view of an in-situ infrared reaction pool according to an exemplary embodiment.

[0024] Figure 5 is a gas infrared spectrum according to an exemplary embodiment.

[0025] Figure 6 is an in-situ infrared spectrum obtained by gas and sample reaction according to an exemplary embodiment.

[0026] Figure 7 is an in-situ infrared spectrum of an active substance with light irradiation time according to an exemplary embodiment.

[0027] In the drawings:

[0028] 1-first infrared window sheet, 2-dismountable front cover, 3-chamber, 4-sample support, 5-heating sheet, 6-second infrared window sheet, 7-back cover, 8-gas inlet, 9-gas outlet, 10-wire inlet, 11-light source irradiation opening, 12-sample-carrying infrared window sheet, 13-guide rail. DETAILED DESCRIPTION

[0029] Clearly, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0030] Hereinafter, the terms "first", "second", and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In addition, in the present application, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0032] In the present application, unless otherwise specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0033] As shown in Figures 1-4 , the present application provides an in-situ infrared reaction cell. Referring to Figures 1-4 , the in-situ infrared reaction cell can include: a chamber 3, a detachable front cover 2, a rear cover 7, a sample holder 4, a heating sheet 5, a first infrared window sheet 1, a second infrared window sheet 6, and a sample-loaded infrared window sheet 12.

[0034] The front end of the chamber 3 is clamped with the detachable front cover 2, and the rear end of the chamber 3 is fixedly connected with the rear cover 7; the sample holder 4 is detachably connected with the sample-loaded infrared window sheet 12, and the sample holder 4 is detachably connected in the chamber 3, and the heating sheet 5 is arranged at the rear end of the sample holder 4; the front end of the detachable front cover 2 is detachably connected with the first infrared window sheet 1, and the rear cover 7 is detachably connected with the second infrared window sheet 6; one side wall of the chamber 3 is provided with an air inlet 8, and the other side wall of the chamber 3 is provided with an air outlet 9; the chamber 3 is further provided with a wire inlet 10 for connecting the heating sheet 5, and the front end of the chamber 3 is provided with an inclined light source irradiation port 11. Wherein, the chamber 3 is a symmetrical octahedron, the side is a hexagon combined with the long side of the isosceles trapezoid and the rectangle, the air inlet 8 is located at the lower end, and the air outlet 9 is located at the upper end, so as to further ensure the uniformity of the gas in the cell.

[0035] Thus, the sample to be tested can be arranged on the sample loading infrared window 12, and the gas for reacting with the sample is provided through the gas inlet 8 and the gas outlet 9, and the gas inlet 8 and the gas outlet 9 are located at the opposite sides of the chamber 3 to ensure the uniformity of the gas concentration in the cell. The infrared light signal is transmitted through the first infrared window 1 and the second infrared window 6. In the heat-activated system, the heating sheet 5 can be heated by an external device to provide a heat source for the sample on the sample loading infrared window 12. In the light-activated system, the light source irradiation port 11 can provide light irradiation to the sample on the sample loading infrared window 12.

[0036] The in-situ infrared reaction cell of the embodiments of the present application has a compact structure, a small volume, and a low cost, and is convenient to use directly on a conventional infrared analysis support. The gas concentration in the reaction cell is uniform. The infrared signal is obvious and has less interference. The light source irradiation port is provided to provide light irradiation, and the heating sheet is provided to provide a heat source, and the in-situ infrared gas-solid reaction is suitable for a light / heat activated system.

[0037] In some embodiments, a cooling device is arranged outside the chamber 3, and the cooling time after the test is short, and the sample can be immediately replaced.

[0038] In some embodiments, two inclined light source irradiation ports 11 are arranged at the front end of the chamber 3, and the two light source irradiation ports 11 are respectively arranged at 120 degrees with the top end and the low end of the chamber 3 to ensure the required light intensity.

[0039] In some embodiments, the heating sheet 5 is a hollow ring, and the hollow diameter is 2 mm smaller than the sample loading infrared window 12, so as to uniformly heat the sample on the sample loading infrared window 12.

[0040] In some embodiments, the sample support 4 is provided with an arc-shaped groove for fixing the sample loading infrared window 12, and the groove depth is 2 mm, so as to facilitate the detachable connection of the sample loading infrared window 12.

[0041] In some embodiments, the heating sheet 5 is bonded outside the arc-shaped groove through a high-temperature resistant adhesive tape, so as to ensure that the sample temperature is consistent with the temperature of the heating sheet 5.

[0042] In some implementations, a valve is installed at each of the gas inlet 8 and the gas outlet 9 to control the gas flow.

[0043] In some embodiments, the rear cover 7 has a rectangular structure, and the two long sides of the rectangular structure are provided with guide rails 13, and the width of the guide rail 13 is greater than 4 mm. The chamber 3 is integrally formed with the rear cover 7, so as to be fixed with the infrared analysis sample support through the guide rail 13, and the integral forming ensures the reliability of the structure.

[0044] In some embodiments, the centers of the first infrared window 1, the sample loading infrared window 12, the heating sheet 5, and the second infrared window 6 are on a horizontal line, so as to ensure the infrared light irradiation angle.

[0045] In some embodiments, the materials of the detachable front cover 2, the chamber 3, the sample holder 4 and the rear cover 7 are transparent quartz, the material of the heating sheet 5 is ceramic, and the materials of the sample-loaded infrared window sheet 12, the first infrared window sheet 1 and the second infrared window sheet 6 are one of potassium bromide, calcium fluoride, barium fluoride and zinc selenide, so as to ensure the testing performance of the reaction cell.

[0046] In some embodiments, the first infrared window sheet 1 is attached to the clamping groove at the front end of the detachable front cover 2 through sealing glue, the clamping groove at the rear end of the detachable front cover 2 is attached to the chamber 3 through sealing glue, and the second infrared window sheet 6 is attached to the clamping groove of the rear cover 7 through sealing glue. The operation is simple and easy to implement.

[0047] The use method of the in-situ infrared reaction cell in the above embodiments is as follows:

[0048] Before testing, the first infrared window sheet 1 and the second infrared window sheet 6 are respectively attached to the corresponding clamping grooves of the detachable front cover 2 and the rear cover 7 through sealing glue, the heating sheet 5 is bonded to the outside of the arc-shaped groove at the upper end of the sample holder 4 through high-temperature-resistant adhesive tape, the sample-loaded infrared window sheet 12 is placed on the sample holder 4, and the centers of the first infrared window sheet 1, the sample-loaded infrared window sheet 12, the heating sheet 5 and the second infrared window sheet 6 are ensured to be on a horizontal line.

[0049] The sample solution or suspension is dropped on the sample-loaded infrared window sheet 12, and after the sample is dried, the detachable front cover 2 is attached to the chamber 3 through sealing glue, and the entire reaction cell is directly placed on a conventional infrared sample holder through the guide rail 13.

[0050] In use, the gas inlet 8 is connected to a reaction gas source through a gas pipe or is punctured for gas charging, the gas enters from the lower end of the reaction cell and is discharged from the gas outlet 9 at the upper end, so as to ensure that the gas uniformly fills the entire chamber 3, and the gas outlet 9 is connected to a tail gas treatment device. The reaction cell of the present embodiment can test the infrared spectrum of the gas alone, for example, the infrared spectrum of n-propanol alone, as shown in Figure 5 .

[0051] In the thermal activation system, the heating sheet 5 is temperature-controlled by connecting an adjustable direct-current stabilized power supply. The testing process is as follows: the adjustable direct-current stabilized power supply is started, the voltage value required by the heating sheet 5 is set, the background is tested for 10 minutes, the required gas is introduced, and the sample is tested at the same time. The testing nodes are determined by the gas charging time, for example, 30 seconds for one node. The in-situ infrared spectrum obtained by the reaction of the gas and the sample, for example, the reaction of a solid sample and introduced n-propanol gas, is as shown in Figure 6 .

[0052] In the photoactivation system, the light source irradiates on the sample through the light source irradiation port 11 on the chamber 3, the light is perpendicular to the light source irradiation window, the center of the light spot coincides with the center of the sample support 4 on the sample carrying infrared window sheet 12, and the test process is: testing the background under no light or ambient light; starting the required light source while testing the sample, the test node is determined by the light irradiation time, and the in-situ infrared spectrum of the active substance obtained with the light irradiation time, for example, the sample under green light irradiation, as shown in Figure 7 .

[0053] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the general concept of the application and that the specification and examples be considered exemplary only. It is further intended that the disclosure of a particular feature meet embodiment not serve to exclude other similar features.

[0054] It is to be understood that the application is not limited to the precise construction described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be defined by the claims appended hereto.

Claims

1. An in situ infrared reaction cell characterized by, The utility model relates to a chamber, detachable front cover, rear cover, sample support, heating sheet, first infrared window piece, second infrared window piece and sample loading infrared window piece, the front end of chamber is jointed with detachable front cover, the rear end of chamber is fixedly connected with rear cover, sample support is detachably connected with sample loading infrared window piece, sample support is detachably connected in chamber, heating sheet is arranged at the rear end of sample support, the front end of detachable front cover is detachably connected with first infrared window piece, rear cover is detachably connected with second infrared window piece, one side wall of chamber is equipped with air inlet, the other side wall of chamber is equipped with air outlet, chamber is further equipped with wire inlet for connecting heating sheet, the front end of chamber is provided with inclined light source irradiation port. The front end of the chamber is provided with two inclined light source irradiation ports, and the two light source irradiation ports are respectively 120 degrees from the top end and the low end of the chamber.

2. The in situ infrared reaction cell of claim 1, wherein, The heating sheet is a hollow ring.

3. The in situ infrared reaction cell of claim 1, wherein, The sample support is provided with an arc-shaped groove for fixing the sample loading infrared window piece.

4. The in situ infrared reaction cell of claim 1, wherein, The heating sheet is bonded to the outside of the arc-shaped groove by a high-temperature resistant adhesive tape.

5. The in situ infrared reaction cell of claim 4, wherein, Valves are installed at the air inlet and the air outlet.

6. The in situ infrared reaction cell of claim 1, wherein, The rear cover is a rectangular structure, and the two long sides of the rectangular structure are provided with guide rails.

7. The in situ infrared reaction cell of claim 1, wherein, The centers of the first infrared window piece, the sample loading infrared window piece, the heating sheet and the second infrared window piece are on a horizontal line.

8. The in situ infrared reaction cell of claim 1, wherein, The materials of the detachable front cover, the chamber, the sample support and the rear cover are all transparent quartz, the material of the heating sheet is ceramic, and the materials of the sample loading infrared window piece, the first infrared window piece and the second infrared window piece are one of potassium bromide, calcium fluoride, barium fluoride and zinc selenide.

9. The in situ infrared reaction cell of claim 1, wherein, The first infrared window piece is attached to the clamping groove at the front end of the detachable front cover by sealing glue, the clamping groove at the rear end of the detachable front cover is attached to the chamber by sealing glue, and the second infrared window piece is attached to the clamping groove of the rear cover by sealing glue.

10. The in situ infrared reaction cell of claim 1, wherein, ​

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