A contact separation type friction catalytic device

Abstract

This invention discloses a contact-separation tribocatalytic device, belonging to the field of catalytic device technology. It includes a porous spherical shell containing a hollow square body. The device also includes semi-circular friction plates uniformly disposed on the hollow square body. Unlike existing technologies, this solution is based on a unique electrification principle. Its contact-separation electrification efficiency is mainly affected by the contact area and the material's inherent properties; that is, the larger the contact area, the higher the electrification efficiency. Based on this characteristic, the device's size design has greater flexibility, allowing it to be directly manufactured in larger sizes without the need for complex processes to produce small particles as in existing technologies. The device's operating time is unrestricted; as long as the internal structure remains intact, the tribocatalytic device can operate continuously and stably. This feature gives the device a significant advantage in applications requiring long-term continuous operation.

Description

Technical Field

[0001] This invention relates to the field of catalytic device technology, specifically a contact separation type friction catalytic device. Background Technology

[0002] Water pollution has become a global environmental problem, with organic pollution being one of the main forms. Effective degradation of organic pollutants is crucial for solving this problem. Currently, organic pollution degradation technologies mainly fall into three categories: oxidative decomposition, electrochemical decomposition, and catalytic decomposition. Catalytic decomposition is further divided into photocatalysis, piezoelectric catalysis, and tribocatalysis. Among these, tribocatalysis offers advantages such as rapid reaction, wide availability of energy sources, and readily available friction materials, making it a promising new degradation technology. However, tribocatalysis still suffers from limitations such as a limited number of excitation methods and an unclear catalytic mechanism. To address these issues, this invention first proposes a contact-separation tribocatalysis method and develops a contact-separation tribocatalysis device.

[0003] Current research on triboelectric catalysis can be broadly categorized into two types based on the different excitation methods: magnetic stirring and ultrasonic-induced contact electrification. However, current research on triboelectric catalysis still has the following drawbacks:

[0004] 1. Although the nanoparticles or powdered catalytic materials widely used in current research have high catalytic activity, their small size makes solid-liquid separation difficult, making it hard to achieve efficient recovery. They are also prone to remaining in the reaction system and causing secondary environmental pollution.

[0005] 2. In laboratory environments, high-energy-consuming equipment such as high-frequency electromagnetic stirring or ultrasound is often used to enhance electron transfer in the triboelectric effect and improve catalytic efficiency. The high cost and high energy consumption of such equipment limit its feasibility in large-scale practical applications.

[0006] Therefore, a contact separation type friction catalytic device is proposed to solve the above problems. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to provide a contact separation type friction catalytic device to solve the problems that have occurred in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a contact separation type friction catalytic device, comprising a porous spherical shell, wherein a hollow square body is installed in the porous spherical shell, and the contact separation type friction catalytic device further comprises a semi-circular friction plate, wherein the semi-circular friction plate is uniformly disposed on the hollow square body.

[0009] Preferably, the porous spherical shell is made of ordinary plastic, has a transparent appearance for easy observation, and is composed of two hemispherical shells.

[0010] Preferably, the porous spherical shell has uniformly spaced water injection holes for uniformly injecting water containing organic pollutants (such as seawater) into the interior of the porous spherical shell.

[0011] Preferably, a double-ended bolt is installed in the hollow square body with uniform threads, and the semi-circular friction plate is installed on the non-threaded outer surface of the double-ended bolt. A swivel ring is provided on the side of the semi-circular friction plate away from the hollow square body.

[0012] Preferably, the swivel ring is sleeved on the outer surface of the double-ended bolt, and a nut is provided on the side of the swivel ring away from the semi-circular friction plate, and the nut is threaded onto the double-ended bolt.

[0013] Preferably, the semi-circular friction pad is made of polytetrafluoroethylene, the diagonal dimension of the hollow square body is adapted to the diameter of the inner surface of the porous spherical shell, and the four corners of the hollow square body are engaged with the inner surface of the porous spherical shell.

[0014] Compared with the prior art, the contact separation type friction catalytic device provided by the present invention has the following advantages:

[0015] Beneficial effects:

[0016] 1. This invention is a self-powered device. This invention is the first to combine tribocatalysis with the principle of contact separation triboelectric charging. It utilizes water wave energy and its own gravity to continuously contact and separate the friction pairs, generating triboelectric charging, thereby producing a tribocatalytic effect and degrading organic matter in seawater.

[0017] 2. The friction pair material of this invention is simple in design. Existing technology utilizes high-frequency energy to generate triboelectric charging through material collisions. To improve the charging efficiency, the material must be processed into small particles, which is cumbersome and the small particles are difficult to recycle. The friction pair material of this invention is simple and readily available. Due to the different principle, the factors affecting the contact separation charging efficiency are the contact area and the material's own properties. The larger the contact area, the higher the charging efficiency. Therefore, the friction pair size of this device can be made larger without the additional process of making small particles as in existing technologies. Furthermore, the device's operating time is unlimited; as long as the internal components are not damaged, the friction device will not fail.

[0018] 3. This invention can continuously and automatically degrade organic matter in seawater through frictional catalysis. The perforated spherical shell design of this invention allows for continuous exchange of seawater between the inside and outside of the device, eliminating the need for manual water changes or drainage, thus achieving truly automatic degradation of organic matter. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the porous spherical shell of the present invention in half section.

[0021] Figure 3 This is a schematic diagram of the connection relationship of the hollow square body structure of the present invention;

[0022] Figure 4 This is a schematic diagram showing the disassembled state of the hollow square body structure of the present invention.

[0023] Figure 5 This is a schematic diagram showing the linear fitting between the concentration of methyl orange solution and absorbance.

[0024] Figure 6 This is a schematic diagram showing the degradation amount of methyl orange solution at different concentrations.

[0025] Figure 7 This is a schematic diagram showing the degradation rate of methyl orange solution.

[0026] In the picture:

[0027] 1. Porous spherical shell; 11. Hollow square body; 21. Water injection hole; 31. Double-ended bolt; 32. Semi-circular friction plate; 33. Rotary ring; 34. Nut. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Example 1, please refer to Figures 1 to 7 As shown:

[0031] To address the problems mentioned in the technical solutions, this application provides a contact separation type friction catalytic device, including a porous spherical shell 1, in which a hollow square body 11 is installed. The contact separation type friction catalytic device also includes a semi-circular friction plate 32, which is uniformly disposed on the hollow square body 11.

[0032] The porous spherical shell 1 is made of ordinary plastic, which has low density, is easy to float, and is transparent in appearance for easy observation. The porous spherical shell 1 is composed of two hemispherical shells.

[0033] The porous spherical shell 1 has uniformly spaced water injection holes 21, which are used to uniformly inject seawater into the interior of the porous spherical shell 1.

[0034] The porous spherical shell 1 is designed as a spherical outer shell, which is more easily propelled by water waves compared to a cubic device. The internal friction device generates more contact-separation interactions within the same time frame, resulting in a larger charge and higher catalytic efficiency. This invention is the first to utilize a contact-separation triboelectric catalytic device. Through internal design, the internal friction pairs spontaneously generate contact-separation triboelectric charges under the influence of gravity and water waves. This device has a simple structure, requires no high-frequency energy drive, and the friction pair structure is intact, easy to recycle, and does not cause new pollution.

[0035] Specifically, a double-ended bolt 31 is evenly threaded on the hollow square body 11, and a semi-circular friction plate 32 is installed on the non-threaded outer surface of the double-ended bolt 31. A swivel ring 33 is provided on the side of the semi-circular friction plate 32 away from the hollow square body 11.

[0036] The hollow square body 11 is made of nylon (polyamide), and the hollow square body 11 is hollow in the middle, which can reduce the weight of the entire device while maximizing buoyancy.

[0037] The swivel ring 33 is sleeved on the outer surface of the double-ended bolt 31. A nut 34 is provided on the side of the swivel ring 33 away from the semi-circular friction plate 32. The nut 34 is threaded onto the double-ended bolt 31.

[0038] In this design, the semi-circular friction plate 32 is designed to be rotatably fitted onto the non-threaded outer surface of the double-ended bolt 31; specifically, the semi-circular friction plate 32 can rotate freely on the double-ended bolt 31 by gravity, thereby generating a rotational friction effect when in contact with water.

[0039] In addition, this solution also features another working mode: the semi-circular friction plate 32 can slide on the non-threaded outer surface of the double-ended bolt 31, achieving vertical contact and separation. This design eliminates the need for a fixed connection between the semi-circular friction plate 32 and the double-ended bolt 31, allowing for flexible adjustment of their relative positions to achieve both rotational contact separation and vertical contact separation. The semi-circular friction plate 32 is made of polytetrafluoroethylene (PTFE), and the diagonal dimensions of the hollow square body 11 are matched to the diameter of the inner surface of the porous spherical shell 1. The four corners of the hollow square body 11 are engaged with the inner surface of the porous spherical shell 1.

[0040] The semicircular friction plate 32 is fixed to the hollow square body 11 by a double-ended bolt 31 and a nut 34. One side of the double-ended bolt 31 is screwed into the hollow square body 11 for fixation, and the smooth part of the double-ended bolt 31 is fitted onto the semicircular friction plate 32. The other side is secured with a nut 34 to prevent the semicircular friction plate 32 from falling off. The function of the double-ended bolt 31 is to restrict the xyz degrees of freedom of the semicircular friction plate 32, but not to restrict the rotational degrees of freedom of the semicircular friction plate 32 around the double-ended bolt 31.

[0041] The specific implementation process of the above embodiments is as follows;

[0042] Principle of the device of this invention:

[0043] The principle of tribocatalysis is that electrons and holes generated on the surface of the material after friction react with water and oxygen in the water to form hydroxyl radicals and superoxide radicals, which finally oxidize and decompose organic pollutants into harmless water and carbon dioxide.

[0044] Therefore, this device must satisfy:

[0045] 1. The device can automatically generate electrons and holes on the surface of materials through friction.

[0046] 2. The surface on which electrons and holes are generated after the device is rubbed must be able to come into contact with water.

[0047] This device is designed with semi-circular friction plates 32. Under the absence of water wave impact, the internal friction mechanism is in a stable state, meaning all semi-circular friction plates 32 are at their lowest point under the influence of gravity. After being impacted by water waves, the semi-circular friction plates 32 initially move along with the hollow square body 11 under the influence of inertial force. At this time, the semi-circular friction plates 32 are not at their lowest point, and are in an unstable state. After the inertial force disappears, the semi-circular friction plates 32 return to their lowest point under the influence of gravitational potential energy, i.e., return to the stable state. Therefore, under continuous water wave impact, the semi-circular friction plates 32 repeatedly go through the process from stable state → unstable state → stable state, repeatedly experiencing contact-separation friction with the hollow square body 11, and repeatedly exposing the friction surface to contact with water, thus achieving the purpose of catalytic degradation.

[0048] Under the impact of seawater, the entire sphere of this device moves in an unpredictable manner with the water flow. At this time, water containing organic pollutants (such as seawater) is uniformly injected into the porous shell. For example, after seawater enters the porous shell 1, the internal friction device moves with the sphere, and the internal semi-circular friction plate 32 will move to an unpredictable position. Under the action of gravity, the semi-circular friction plate 32 will always return to the fixed position after the impact.

[0049] (The fixed position is vertically downward).

[0050] Existing technologies rely on high-frequency energy, such as magnetic stirring rods and ultrasonic instruments. These technologies require harsh environments, consume large amounts of energy, and are difficult to apply in actual industrial production. This invention does not require a high-frequency external driving force, nor does it require an internal power supply. It achieves the tribocatalytic effect solely through the low-frequency energy propelled by water waves and the interaction of gravity.

[0051] Example 2;

[0052] Unlike Example 1, this experiment selected methyl orange as the organic pollutant, and therefore prepared a methyl orange solution as the solution to be degraded to measure the tribocatalytic degradation efficiency.

[0053] This experiment first uses a solution absorbance measuring device to measure the absorbance parameters of methyl orange solutions with different concentrations. For example... Figure 5 As shown, by combining the Lambert-Beer law, a linear fit is made between the absorbance and concentration of the solution, and then the mathematical relationship between the absorbance and concentration of the methyl orange solution is derived.

[0054] In this experiment, a small amount of methyl orange powder was prepared into a 20 mg / L methyl orange solution. The methyl orange powder was fully dissolved. Then, 10 ml of the prepared methyl orange solution was taken and 30 ml of water was added to dilute it to 5 mg / L for the experiment.

[0055] After seven repeated experiments (see...) Figure 6 , Figure 7 The developed contact separation triboelectric catalytic device can be used to catalyze the degradation of methyl orange solution. The contact separation triboelectric catalytic degradation effect is stable. After 3 hours (about 1350 contact separations), the average degradation amount of methyl orange solution is 2.13 mg / L, and the average degradation rate of methyl orange solution is 42.61%.

[0056] The materials used in this invention are simple, readily available, and easily recyclable and replaceable, without causing pollution. Current tribocatalytic degradation technologies often use materials in the form of fine particles to increase the friction and collision areas, thereby significantly improving the electrostatic phenomenon and enhancing the tribocatalytic degradation effect. However, these particulate friction materials are difficult to recycle, and direct disposal can also cause pollution. The friction pair in this invention consists of a large hollow square body 11 and a semi-circular friction plate 32. Protected by a porous spherical shell 1, it is difficult to fail, and the semi-circular friction plate 32 can be replaced promptly. Furthermore, if the device needs to be scrapped, this invention is easier to recycle.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contact separation type friction catalytic device, characterized in that, The device includes a porous spherical shell (1), in which a hollow square body (11) is installed. The contact separation type friction catalytic device also includes a semi-circular friction plate (32), which is uniformly arranged on the hollow square body (11). The porous spherical shell (1) has water injection holes (21) uniformly arranged on it. The water injection holes (21) are used to uniformly inject water containing organic pollutants into the interior of the porous spherical shell (1). The hollow square body (11) is uniformly threaded with a double-ended bolt (31), and the semi-circular friction plate (32) is installed on the non-threaded outer surface of the double-ended bolt (31). A swivel ring (33) is provided on the side of the semi-circular friction plate (32) away from the hollow square body (11). The swivel (33) is sleeved on the outer surface of the double-ended bolt (31). A nut (34) is provided on the side of the swivel (33) away from the semi-circular friction plate (32). The nut (34) is threaded onto the double-ended bolt (31).

2. The contact separation type friction catalytic device according to claim 1, characterized in that: The porous spherical shell (1) is made of ordinary plastic and has a transparent appearance for easy observation. The porous spherical shell (1) is composed of two hemispherical shells.

3. The contact separation type friction catalytic device according to claim 1, characterized in that: The semi-circular friction plate (32) is made of polytetrafluoroethylene. The diagonal dimension of the hollow square body (11) is adapted to the inner surface diameter of the porous spherical shell (1). The four corners of the hollow square body (11) are engaged with the inner surface of the porous spherical shell (1).

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