CN210815200U - Light conversion device and photocatalytic reaction device - Google Patents
Light conversion device and photocatalytic reaction device Download PDFInfo
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- CN210815200U CN210815200U CN201921493629.9U CN201921493629U CN210815200U CN 210815200 U CN210815200 U CN 210815200U CN 201921493629 U CN201921493629 U CN 201921493629U CN 210815200 U CN210815200 U CN 210815200U
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Abstract
The application provides a light conversion device, including first closed barrel and with the first second closed barrel that closes the coaxial setting of barrel, first closed barrel is located the second and seals the barrel, is equipped with near infrared light source in the first closed barrel, and first closed barrel and second seal the cavity packing between the barrel and have the luminous dyestuff of up-conversion, and near infrared light that near infrared light source sent is through the luminous dyestuff of up-conversion converts to visible light. According to the photocatalytic reaction device, near infrared light emitted by the near infrared light source positioned in the first closed cylinder is converted into a high-energy singlet excited state through the upconversion dye filled in the first cavity, so that the migration from low-energy near infrared light to high-energy visible light is realized, and the photochemical reaction of reaction raw materials positioned in the second cavity can be effectively catalyzed. In addition, this application still provides a photocatalytic reaction device.
Description
Technical Field
The utility model relates to a chemical industry equipment especially relates to light conversion equipment and photocatalytic reaction device.
Background
In recent years, photocatalytic redox reactions have become an area of research of great interest, and many reactions are carried out under mild conditions by using excited electrons generated by ultraviolet or visible light as a driving force. Since chemical reactions themselves put demands on the energy of light, ultraviolet or visible light has been widely used as a light source in photocatalytic redox systems in the past. However, ultraviolet or visible light has a weak penetration in many reaction media and only excites the light-absorbing layer of the surface, resulting in difficulty in amplifying the reaction system. Also, in some cases, the reactants will also have strong visible absorption.
In fact, the limited penetration of visible light into media has plagued researchers in many fields, particularly in the field of bioimaging (visualization of the interior of tissues by optical means such as fluorescent markers) because biological tissues absorb visible light far more strongly than chemically reactive media. Researchers have considered the use of near infrared light because it has a considerable depth of penetration in biological tissues, a complex system, but the energy of near infrared light is low and is usually not enough to drive most of the photochemical reactions currently.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a light conversion device capable of converting low-energy near-infrared light into high-energy visible light.
The utility model provides a light conversion device, including first closed barrel and with the first second closed barrel that seals the coaxial setting of barrel, first closed barrel is located in the second closed barrel, be equipped with near infrared light source in the first closed barrel, the cavity packing that first closed barrel and second closed between the barrel has the luminescent dye of upper conversion, near infrared light that near infrared light source sent is through the luminescent dye of upper conversion converts into visible light.
In one embodiment, the near-infrared light source comprises a plurality of near-infrared lamp groups, and the near-infrared lamp groups are uniformly arranged in the first closed cylinder along the circumferential direction.
In one embodiment, each near-infrared lamp group comprises a plurality of near-infrared lamps which are arranged in parallel along the axial direction.
In one embodiment, each near-infrared lamp is attached to the inner side of the cylinder wall of the first closed cylinder through a light source cover.
In one embodiment, the radial distance between the cylinder walls of the first closed cylinder and the second closed cylinder is 1 cm-3 cm.
In one embodiment, the first closed cylinder and the second closed cylinder share a sealing cover and a sealing base.
In addition, the application also provides a photocatalytic reaction device comprising the light conversion device, and the specific scheme is as follows:
a photocatalytic reaction device comprises the light conversion device and a third closed cylinder body coaxially arranged with the light conversion device, wherein the light conversion device is positioned in the third closed cylinder body, and a cavity between the third closed cylinder body and the light conversion device is used for containing reaction raw materials.
In one embodiment, the outer side of the cylinder wall of the third closed cylinder is provided with an opaque total reflection material layer.
In one embodiment, the photocatalytic reaction device further includes a stirring device, the stirring device includes a stirring shaft, a motor and a stirring rod, one end of the stirring shaft is located outside the third sealed barrel and connected to the motor, the other end of the stirring shaft is inserted into the third sealed barrel and connected to the stirring rod, the motor is used for driving the stirring shaft to rotate, the stirring rod is located in a cavity between the third sealed barrel and the second sealed barrel, one end of the stirring rod is connected to the stirring shaft, the other end of the stirring rod extends to a position between the walls of the third sealed barrel and the second sealed barrel, and the stirring rod is driven by the stirring shaft to perform circular motion.
In one embodiment, the photocatalytic reaction device further comprises a controller, and the controller is electrically connected with the motor and the near-infrared light source to control the motor and the near-infrared light source.
For convenience of description, the cavity between the first closed cylinder and the second closed cylinder is hereinafter referred to as the first cavity, and the cavity between the third closed cylinder and the light conversion device (i.e., the cavity between the second closed cylinder and the third closed cylinder) is hereinafter referred to as the second cavity.
According to the photocatalytic reaction device, near infrared light emitted by the near infrared light source positioned in the first closed cylinder is converted into a high-energy singlet excited state through the upconversion dye filled in the first cavity, so that the migration from low-energy near infrared light to high-energy visible light is realized, and the photochemical reaction of reaction raw materials positioned in the second cavity can be effectively catalyzed.
Drawings
FIG. 1 is a schematic structural diagram of a light conversion device according to an embodiment;
fig. 2 is a schematic structural diagram of a photocatalytic reaction apparatus according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention will be described. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a light conversion device 1 according to an embodiment includes a first sealed cylinder 10 and a second sealed cylinder 20. The first closed cylinder 10 and the second closed cylinder 20 are coaxially arranged, and the first closed cylinder 10 is located in the second closed cylinder 20.
Further, a near-infrared light source (not shown) is disposed in the first closed cylinder 10 for emitting near-infrared light.
In the present embodiment, the near-infrared light source includes a plurality of near-infrared lamp sets, and the near-infrared lamp sets are uniformly arranged in the first closed cylinder 10 along the circumferential direction. Each near-infrared lamp group comprises a plurality of near-infrared lamps 110 which are axially arranged in parallel to form light beams which are uniformly distributed along the cylinder wall of the first closed cylinder 10, so that the utilization rate of near-infrared light is improved to the maximum extent.
Furthermore, each near-infrared lamp group comprises 4-8 near-infrared lamps 110 which are arranged in parallel along the axial direction. The near-infrared lamps 110 are arranged in parallel, so that the influence on a whole group of lamps when one lamp breaks down can be prevented, the maintenance and the replacement are convenient, and the operation is simple and rapid.
Further, the frequency of each near-infrared lamp 110 is 0W to 20W.
It is understood that the number of the near infrared lamps and the frequency of the near infrared lamps in each group of near infrared lamps can be adjusted according to the size of the first closed cylinder 10 and the required intensity of the near infrared light.
Further, each near-infrared lamp 110 is attached to the wall of the first closed cylinder 10 through a light source cover (not shown) to concentrate light beams as much as possible while preventing the light source from directly contacting the wall and being affected by thermal expansion and contraction of the wall.
In this embodiment, each near-infrared lamp 110 corresponds to one light source cover, which facilitates maintenance and replacement. In other embodiments, each group of near-infrared lamps may also share one light source cover, or a part of near-infrared lamps share one light source cover, or all near-infrared lamps share one light source cover, which is not described herein again.
In the present embodiment, each of the near-infrared lamps 110 is uniformly disposed inside the wall of the first closed cylinder 10 by a holder.
It should be noted that the bracket may be a bracket directly disposed on the wall of the cylinder, may be a bracket disposed in the first closed cylinder 10, or may be another bracket as long as the near-infrared lamps 110 can be fixed in the first closed cylinder 10 and uniformly distributed along the wall of the first closed cylinder 10.
Of course, the near-infrared lamp may be placed in the first closed barrel at will without any limitation as to the form of distribution, regardless of the effective use of the near-infrared light source.
Specifically, in this embodiment, the support is a cylindrical hollow support (not shown) disposed inside the first closed cylinder and coaxial with the first closed cylinder, and the power line of the near-infrared light source is concentrated inside the hollow support and connected to the power source disposed inside the first closed cylinder or outside the first closed cylinder.
Further, the cavity (i.e. the first cavity) between the first closed cylinder 10 and the second closed cylinder 20 is filled with the up-conversion luminescent dye 100.
It is understood that the first cavity is filled with the upconversion luminescent dye 100 in order to maximize the utilization of near infrared light.
Further, the radial distance between the cylinder walls of the first closed cylinder 10 and the second closed cylinder 20 is 1cm to 3cm, so that the near-infrared light emitted by the near-infrared light source in the first closed cylinder 10 can be effectively converted into high-energy visible light by the up-conversion luminescent dye in the first cavity.
Further, in the present embodiment, the composition of the upconversion luminescent dye 100 is as follows: the solute is FDPP and PdPc with the molar concentration ratio of 20:1, and the solvent is acetonitrile and trifluorotoluene with the volume ratio of 1: 1.
It can be understood that, in the above up-conversion luminescent dye 100, PdPc is a photosensitizer, FDPP is An up-conversion reagent, the photosensitizer PdPc forms a single excitation of near infrared light, 1[ Sen ], then attenuates to a triplet excitation, 3[ Sen ], and then is captured by the up-conversion reagent FDPP to form 3[ An ], and the triplet annihilation up-conversion effect occurs on the two excited states, forming a high-energy singlet excited state, thereby realizing the transfer from low-energy near infrared light to high-energy visible light.
In other embodiments, the composition of the above-described upconverting luminescent dye is as follows: the solute is TTBP and PtTPTNP with a molar concentration ratio of 60:1, and the solvent is acetonitrile and trifluorotoluene with a volume ratio of 1: 1.
It can be understood that, in the above up-conversion luminescent dye, PtTPTNP is a photosensitizer, TTBP is An up-conversion reagent, after the photosensitizer PtTPTNP is excited by near infrared light, a singlet excitation:1[ Sen ] is formed, and then the photosensitizer PtTPTNP is attenuated to a triplet excitation:3[ Sen ], and then the photosensitizer PtTPTNP is captured by the up-conversion reagent TTBP to form 3[ An ], and the triplet annihilation up-conversion effect occurs on the two excited states 3[ An ], so that a high-energy singlet excited state is formed, thereby realizing the transfer from low-energy near infrared light to high-energy visible light.
Wherein the structures of FDPP, PdPC, TTBP and PtTPTNP are as follows:
in the present embodiment, the first and second closure cylinders 10 and 20 share a sealing lid and a sealing base to form a first cavity (not shown) having a ring-shaped radial cross section.
It can be understood that the wall of the first closed cylinder 10 and the wall of the second closed cylinder 20 are both made of high-transmittance glass, and the sealing cover is of a teflon structure, so as to sufficiently isolate the light source region and the reaction region.
It should be noted that, the above up-conversion luminescent dye may be added and discharged by opening the sealing cover to realize the up-conversion luminescent dye, or a dye liquid feed port and a dye liquid outlet may be opened at a position corresponding to the first cavity on the sealing cover to realize the addition and discharge of the up-conversion luminescent dye, or a dye liquid feed port may be opened at a position corresponding to the first cavity on the sealing cover to realize the addition of the up-conversion luminescent dye, or a dye liquid discharge port may be opened at a position corresponding to the first cavity on the sealing base to realize the discharge of the up-conversion luminescent dye, or any other opening may be provided as long as the addition and discharge of the up-conversion luminescent dye can be realized, which is not described herein again.
Further, the light conversion device may further include a controller electrically connected to the near-infrared light source to control the near-infrared light source.
It is understood that the control includes control of the frequency and number of emissions of the near infrared light source.
According to the light conversion device, light emitted by the near-infrared light source in the first closed cylinder is converted into high-energy visible light through the up-conversion luminescent dye in the first cavity, so that the application range of near-infrared light is expanded.
Referring to fig. 1-2, a photocatalytic reaction device 2 according to an embodiment includes the above-mentioned light conversion device 1 and a third sealing cylinder 30. The light conversion device is coaxially disposed with the third sealing cylinder 30, and the light conversion device is located in the third sealing cylinder 30. The cavity between the third closed cylinder 30 and the light conversion device is used to contain the reaction raw materials.
That is, the photocatalytic reaction apparatus 2 includes a first sealed cylinder 10, a second sealed cylinder 20, and a third sealed cylinder 30 that are coaxially disposed, the first sealed cylinder 10 is located in the second sealed cylinder 20, the second sealed cylinder 20 is located in the third sealed cylinder 30, and a cavity (a second cavity) between the second sealed cylinder 20 and the third sealed cylinder 30 is used for accommodating a reaction material.
In the present embodiment, the third tubular sealing body 30 and the light conversion device 1 share a sealing base, that is, the third tubular sealing body 30, the second tubular sealing body 20, and the first tubular sealing body 10 share a sealing base, and the sealing lid is separately provided to form a second cavity having an n-shaped axial cross section.
It can be understood that the reaction raw material can be added to the reaction raw material and discharged from the reaction solution by opening the sealing cover of the third sealing cylinder, the raw material feeding port and the reaction solution discharging port can be opened at the position of the sealing cover of the third sealing cylinder corresponding to the second cavity to realize the addition of the reaction raw material and the discharge of the reaction solution, or the raw material feeding port is opened at the position of the sealing cover of the third sealing cylinder corresponding to the second cavity to realize the addition of the reaction raw material, the reaction solution discharging port is opened at the position of the sealing base corresponding to the second cavity to realize the discharge of the reaction solution, or any other opening can be used as long as the addition of the reaction raw material and the discharge of the reaction solution can be realized.
Furthermore, a reaction liquid discharge valve is arranged at the reaction liquid discharge port, a raw material feed valve is arranged at the raw material feed port, and the reaction liquid discharge valve and the raw material feed valve are preferably standard ground three-way valves with polytetrafluoroethylene switches, so that the reaction system can be carried out in an anhydrous and oxygen-free environment.
Further, an opaque total-reflection material layer (not shown) is disposed on the outer side of the cylinder wall of the third sealed cylinder 30, that is, a layer of opaque total-reflection material is coated on the outer side of the cylinder wall of the third sealed cylinder 30, so as to reduce light loss, and to concentrate the light emitted from the near-infrared light source in the second cavity, thereby improving the utilization rate of the near-infrared light.
Further, the photocatalytic reaction device further comprises a stirring device, wherein the stirring device comprises a stirring shaft 310, a motor 320 and a stirring rod 330.
Wherein, one end of the stirring shaft 310 is located outside the third closed cylinder 30 and connected to the motor 320, and the other end is inserted into the third closed cylinder 30 and connected to the stirring rod 330. The motor 320 is used for driving the stirring shaft 310 to rotate. The stirring rod 330 is located in the cavity (second cavity) between the third closed cylinder 30 and the second closed cylinder 20, and has one end connected to the stirring shaft 310 and the other end extending to between the walls of the third closed cylinder 30 and the second closed cylinder 20.
The motor 320 is started to drive the stirring shaft 310 to rotate, so as to drive the stirring rod 330 to make circular motion, so as to stir the reaction raw materials and make the reaction fully.
In the present embodiment, there are two stirring rods 330.
It is understood that the stirring rod may be plural in order to achieve sufficient stirring of the reaction raw materials.
Further, the material of the stirring rod 330 is teflon.
In addition, in the present embodiment, one end of the stirring shaft 310 is connected to the motor 320, and the other end is connected to the sealing base of the third cylinder 30, so that the stirring shaft 310 is more stable.
Further, the controller is electrically connected to the motor 320 to control the motor 320.
It is understood that the control includes on and off of the motor 320 and control of the power of the motor 320.
It should be noted that the photocatalytic reaction apparatus may further include other components of the existing reaction equipment, such as a temperature detector, a window, a protective cover, and the like, which are not described herein again.
In the photocatalytic reaction device, near infrared light emitted by the near infrared light source is converted into high-energy visible light through the up-conversion luminescent dye, so that the photochemical reaction of reaction raw materials in the second cavity can be promoted in a mode of transferring energy to the photocatalyst or a mode of directly catalyzing, and a plurality of complex photocatalytic oxidation-reduction reactions which can be generally carried out only by irradiation of the visible light with higher intensity can be carried out under the near infrared light.
The photocatalytic reaction device was used for the following reactions:
the reaction conditions are shown in the following table:
as a result, FDPP/Pdpc and TTBP/PtTPTNP are used as the up-conversion dye solution to catalyze the oxidation-reduction reaction to obtain the yields of 78% and 75%, respectively, while the up-conversion dye is not used, only acetonitrile and benzotrifluoride are added into the first cavity or air is kept, and the reaction is not carried out at all.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a light conversion device, its characterized in that, including first closed barrel and with the first second that seals the coaxial setting of barrel seals the barrel, first closed barrel is located in the second seals the barrel, be equipped with near infrared light source in the first closed barrel, the cavity packing that first closed barrel and second sealed between the barrel has the luminous dyestuff of upper conversion, near infrared light that near infrared light source sent is through the luminous dyestuff of upper conversion converts visible light into.
2. The light conversion device of claim 1, wherein the near-infrared light source comprises a plurality of near-infrared light banks uniformly arranged circumferentially within the first enclosed cylinder.
3. The light conversion device of claim 2, wherein each of the groups of near-infrared lamps comprises a plurality of near-infrared lamps arranged in parallel along an axial direction.
4. The light conversion device of claim 3, wherein each of the near-infrared lamps is attached to the inside of the wall of the first closed cylinder by a light source housing.
5. The light conversion device of claim 1, wherein a radial distance between the cylindrical walls of the first and second closed cylinders is between 1cm and 3 cm.
6. The light conversion device of claim 1, wherein the first and second enclosing cylinders share a sealing cover and a sealing base.
7. A photocatalytic reaction device, comprising the light conversion device according to any one of claims 1 to 6 and a third sealing cylinder coaxially disposed with the light conversion device, wherein the light conversion device is located in the third sealing cylinder, and a cavity between the third sealing cylinder and the light conversion device is used for accommodating a reaction raw material.
8. The photocatalytic reaction device as set forth in claim 7, wherein the third closed cylinder has a light-tight total reflection material layer on the outer side of the cylinder wall.
9. The photocatalytic reaction device according to claim 7, further comprising a stirring device, wherein the stirring device includes a stirring shaft, a motor and a stirring rod, one end of the stirring shaft is located outside the third sealed barrel and connected to the motor, the other end of the stirring shaft is inserted into the third sealed barrel and connected to the stirring rod, the motor is configured to drive the stirring shaft to rotate, the stirring rod is located in the cavity between the third sealed barrel and the second sealed barrel, one end of the stirring rod is connected to the stirring shaft, the other end of the stirring rod extends to a position between the walls of the third sealed barrel and the second sealed barrel, and the stirring rod is driven by the stirring shaft to perform a circular motion.
10. The photocatalytic reaction device as set forth in claim 9, further comprising a controller electrically connected to the motor and the near-infrared light source for controlling the motor and the near-infrared light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921493629.9U CN210815200U (en) | 2019-09-10 | 2019-09-10 | Light conversion device and photocatalytic reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921493629.9U CN210815200U (en) | 2019-09-10 | 2019-09-10 | Light conversion device and photocatalytic reaction device |
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| Publication Number | Publication Date |
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| CN210815200U true CN210815200U (en) | 2020-06-23 |
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| CN201921493629.9U Active CN210815200U (en) | 2019-09-10 | 2019-09-10 | Light conversion device and photocatalytic reaction device |
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Address after: No. 932, Lushan South Road, Yuelu District, Changsha City, Hunan Province Co-patentee after: HUNAN HUATENG PHARMA Co.,Ltd. Patentee after: CENTRAL SOUTH University Address before: 410200 Tongguan Circular Economy Industrial Base, Wangcheng Economic Development Zone, Changsha City, Hunan Province Co-patentee before: CENTRAL SOUTH University Patentee before: HUNAN HUATENG PHARMA Co.,Ltd. |
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Inventor after: Zhang Anlin Inventor before: Zhang Anlin Inventor before: Pan Chunyue Inventor before: Deng Zeping Inventor before: Cheng Jia |
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