Composite layer pellet based on titanium dioxide photocatalysis

Abstract

The utility model discloses a composite layer pellet based on titanium dioxide photocatalysis, and belongs to the field of sewage treatment. The pellet body is a plastic shell with the density smaller than that of water, a graphene oxide layer with adsorption capacity is attached to the surface of the plastic shell, a titanium dioxide layer is attached to the surface of graphene oxide, and a gelatin layer is attached to the surface of titanium dioxide. Compared with the prior art, the small ball body is a plastic shell with the density smaller than that of water. When in use, the small ball only needs to be put into sewage, at the moment, the gelatin layer on the surface of the small ball is dissolved in water, the titanium dioxide layer is exposed, the titanium dioxide layer is subjected to chemical reaction with the sewage after being irradiated by sunlight, and active roots with high oxidation capacity are generated to degrade the sewage. After the titanium dioxide layer on the surface of the small ball is consumed, the graphene oxide layer is exposed, and the graphene oxide layer can play a role in adsorbing harmful substances in sewage. The small ball is low in manufacturing cost and convenient to use, and can be effectively recycled after being used.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a composite layer ball based on titanium dioxide photocatalysis. Background Art

[0002] With the development of the country's industrial level, water pollution caused by industry has become more and more serious. Industrial wastewater is the most important cause of water pollution caused by industrial pollution. It contains many pollutants and has complex components. It is not only difficult to purify in water, but also difficult to treat. The pollutants contained in industrial wastewater vary greatly depending on the type of factory. Even for the same type of factory, the quality and quantity of pollutants contained are different due to different production processes. In addition to the direct injection of industrial wastewater into water bodies to cause pollution, solid waste and exhaust gas can also pollute water bodies.

[0003] TiO2 is an N-type semiconductor nanomaterial with excellent performance. It can make full use of solar energy, is energy-efficient and environmentally friendly, and exhibits good light stability and high reactivity when reacting. It is non-toxic, low-cost, and has no secondary pollution. It is currently the most promising nanofunctional material. It is widely used in wastewater treatment, air purification, sterilization, medical technology, and preparation of environmentally friendly materials. Based on the advantages of TiO2, some equipment that uses TiO2 to solve sewage has been proposed. For example, a Chinese patent with application number 202121699636.1 provides a titanium dioxide photocatalytic degradation device, which is equipped with a water inlet device, a water outlet device, a TiO2 photocatalytic plate, and an ultraviolet lamp irradiation device, which can solve the sewage problem well, but the cost of using the equipment is high, which is not conducive to large-scale use. Utility Model Content

[0004] In order to solve the above technical problems, the main purpose of the utility model is to provide a composite layer ball based on titanium dioxide photocatalysis.

[0005] According to one aspect of the utility model, a composite layer ball based on titanium dioxide photocatalysis is provided, wherein the ball body is a plastic shell having a density less than that of water, a graphene oxide layer with adsorption capacity is attached to the surface of the plastic shell, a titanium dioxide layer is attached to the surface of the graphene oxide, and a gelatin layer is attached to the surface of the titanium dioxide.

[0006] Furthermore, there is a small solid ball inside the plastic shell, which has a density lower than that of water and is insoluble in water, and the small solid ball can roll inside the plastic shell.

[0007] Furthermore, the plastic shell is made of degradable material.

[0008] Furthermore, the diameter of the plastic shell is between 1 cm and 5 cm.

[0009] Further, the gelatin layer is soluble in water.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a composite layer ball based on titanium dioxide photocatalysis. The same as the prior art is that the ball body is a plastic shell with a density less than water. Different from the prior art, a graphene oxide layer with adsorption capacity is attached to the surface of the plastic shell, a titanium dioxide layer is attached to the surface of the graphene oxide layer, and a gelatin layer is attached to the surface of the titanium dioxide. When using, the ball only needs to be thrown into the sewage. At this time, the gelatin layer on the surface of the ball will dissolve in water and expose the titanium dioxide layer. After the titanium dioxide layer is irradiated by sunlight, it will react chemically with the sewage and produce active roots with strong oxidizing ability to degrade the sewage. When the titanium dioxide layer of the composite layer ball based on titanium dioxide photocatalysis is consumed, the graphene oxide layer will be exposed, and the graphene oxide layer can play a role in adsorbing harmful substances in the sewage. The ball has the advantages of low manufacturing cost, convenient use, and can be effectively recycled after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0012] Figure 1 A cross-sectional view of a composite layer sphere based on titanium dioxide photocatalysis;

[0013] Figure 2 The cross-sectional view is of a composite layer sphere based on titanium dioxide photocatalysis containing solid spheres inside.

[0014] The above drawings include the following reference numerals:

[0015] 1. Plastic shell; 2. Graphene oxide layer; 3. Titanium dioxide layer; 4. Gelatin layer; 5. Solid ball. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0019] As mentioned in the background technology, the existing titanium dioxide photocatalytic degradation devices are relatively expensive and are not conducive to large-scale use. To this end, the utility model provides a composite layer ball based on titanium dioxide photocatalysis, which can use ultraviolet light or visible light from sunlight to photocatalytically treat sewage, and can be put into sewage on a large scale for sewage treatment, thereby improving sewage treatment efficiency. In addition, when the titanium dioxide on the surface of the ball is used up, the ball body can be recovered and reprocessed for reuse. The composite layer ball based on titanium dioxide photocatalysis of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0020] See also Figure 1 As shown, the utility model provides a composite layer ball based on titanium dioxide photocatalysis. Similar to the prior art, the ball body is a plastic shell 1 with a density less than that of water. Different from the prior art, a graphene oxide layer 2 with adsorption capacity is attached to the surface of the plastic shell 1, a titanium dioxide layer 3 is attached to the surface of the graphene oxide layer 2, and a gelatin layer 4 is attached to the surface of the titanium dioxide.

[0021] When the composite layer beads based on titanium dioxide photocatalysis provided by the utility model are actually used, it is only necessary to directly throw the beads into sewage. The beads float on the surface of the sewage because their density is lower than that of the sewage. At this time, the gelatin on the surface of the beads dissolves in water, exposing the titanium dioxide layer 3. Titanium dioxide (TiO2) is a broadband semiconductor oxide composed of a valence band (VB), a conduction band (CB) and a forbidden band. The band gap of the titanium dioxide (TiO2) photocatalyst is 3.2eV. When the absorbed photon energy (hv) is greater than or equal to this value, an electron transition will occur, and the electrons on the valence band (VB) will be excited to the conduction band (CB), forming positively charged holes (h+) on the valence band (VB). In addition, electrons have reducing properties. Electrons transition from the forbidden band to the valence band and generate free radicals with strong oxidizing ability (·O2 - ), and the positively charged holes h+ on the valence band (VB) react with water (H2O) and oxygen (O2) to generate hydroxyl radicals (·OH). The electrons react with oxygen (O2) to form active radicals (O2 - ), the holes react with water (H2O) to form active radicals (OH - ), both of which can show strong oxidation ability. That is, the active radical (O2 - and OH - ) can react with organic matter, decomposing the organic matter in sewage into carbon dioxide (CO2) and water (H2O). The surface catalytic reaction equation of titanium dioxide (TiO2) is as follows:

[0022] TiO2+hv→TiO2+h + +e -

[0023] O2+e - → O2 -

[0024] h + +H2O→H + + OH

[0025] O2 - +·O2 - →H2O2+O2

[0026] H2O2+e - → OH+OH -

[0027] When the titanium dioxide layer 3 of the titanium dioxide photocatalytic composite layer ball is completely consumed, the graphene oxide layer 2 will be exposed, and the graphene oxide layer 2 can play a role in absorbing harmful substances in sewage.

[0028] Furthermore, if Figure 2As shown, inside the plastic shell 1 of the composite layer ball based on titanium dioxide photocatalysis, there is also a solid ball 5 with a density less than water and insoluble in water, and the solid ball 5 can roll inside the plastic shell 1. That is to say, when the environment in some areas is relatively bad and the waves in the sewage are large, a solid ball 5 with a density less than water can be added to the ball provided by the utility model to prevent it from being blown away by the wind.

[0029] Furthermore, in order to prevent the composite layer ball based on titanium dioxide photocatalysis from causing environmental pollution when it cannot be recycled, the plastic shell 1 inside the ball is made of degradable material.

[0030] Furthermore, in order to cope with different pollution environments, the diameter of the plastic shell 1 inside the ball is designed to be between 1 cm and 5 cm. When facing a seriously polluted water body, in order to increase the efficiency of degrading the polluted water body, a plastic ball with a plastic shell 1 having a diameter of 1 cm should be used; when facing a lightly polluted water body, a ball with a plastic shell 1 having a diameter of 5 cm can be used to quickly cover the water surface to achieve the purpose of degrading the water body.

[0031] Furthermore, the gelatin layer 4 is soluble in water. When the composite layer ball based on titanium dioxide photocatalysis is not used, the outermost layer of the ball covered with gelatin can effectively prevent the titanium dioxide layer 3 from being lost. When the ball is thrown into a polluted water body, the gelatin layer 4 is dissolved by water, and the exposed titanium dioxide layer 3 can start to degrade the water body.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite layer ball based on titanium dioxide photocatalysis, the ball body is a plastic shell (1) with a density less than that of water, characterized in that: A graphene oxide layer (2) having adsorption capacity is attached to the surface of the plastic shell (1), a titanium dioxide layer (3) is attached to the surface of the graphene oxide layer (2), and a gelatin layer (4) is attached to the surface of the titanium dioxide.

2. The composite layer ball based on titanium dioxide photocatalysis according to claim 1, characterized in that: There is also a small solid ball (5) inside the plastic shell (1) which has a density less than that of water and is insoluble in water. The small solid ball (5) can roll inside the plastic shell (1).

3. The composite layer ball based on titanium dioxide photocatalysis according to claim 1 or 2, characterized in that: The plastic shell (1) is made of degradable material.

4. The composite layer ball based on titanium dioxide photocatalysis according to claim 3, characterized in that: The diameter of the plastic shell (1) is between 1 cm and 5 cm.

5. The composite layer ball based on titanium dioxide photocatalysis according to claim 4, characterized in that: The gelatin layer (4) is soluble in water.

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