CN216396312U - Oxygen-sulfur doped graphite phase carbon nitride quantum dot photodegradation composite layer and reactor using same - Google Patents
Oxygen-sulfur doped graphite phase carbon nitride quantum dot photodegradation composite layer and reactor using same Download PDFInfo
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Abstract
The utility model discloses an oxygen-sulfur doped graphite-phase carbon nitride quantum dot photodegradation composite layer and a reactor using the same, and belongs to the field of nano materials. It includes basic unit, photochromism layer, buffer layer and photodegradation layer, the basic unit outside is equipped with the photochromism layer, and the photochromism layer outside is equipped with the buffer layer, and the buffer layer outside is equipped with the photodegradation layer, the photochromism layer is the main working layer of the function of discolouing of composite bed, and photodegradation layer reinforcing hardness provides the function of degrading the toxic material, prevents dust with the buffer layer and provides the shock resistance effect cooperation, can make mechanical energy dispersion, improves the hardness of composite bed, and shock resistance to can also degrade the toxic pollutant in the operational environment, reduce the injury to the human body, and still the design has an applied its reactor, reduces the pollution of reaction accessory substance to the environment, and the overall design is simple and practical.
Description
Technical Field
The utility model belongs to the field of composite materials, and particularly relates to an oxygen-sulfur doped graphite-phase carbon nitride quantum dot photodegradation composite layer and a reactor using the same.
Background
The graphite phase carbon nitride is a substance consisting of carbon and nitrogen atoms sp2Hybridized and connected by taking triazine as a structural unit to form the novel two-dimensional carbon material. Graphene-like conjugated network structure endowing g-C3N4High stability and special chemical properties. In addition, g-C3N4It also has a broad spectral absorption range and a moderate bandgap energy (about 2.7eV), which in turn exhibits excellent optical and electrical properties. C3N4Is a soft phase, has small density and low energy, and is most stable at normal temperature and normal pressure. C3N4And the photocatalyst also has excellent acid and alkali resistance, excellent biocompatibility, proper forbidden band width and rich specific surface area, and can be applied to photocatalysts, catalyst carriers, medical detectors, electrode materials and the like. Substitution of O and S atoms for doped C3N4The quantum dot system is more stable, and C is obtained after doping3N4Electricity (D) fromThe sub-absorption spectrum is greatly changed, and except for a strong absorption peak at the wavelength of about 400nm, the absorption spectrum has strong absorption in the whole visible light range and even the infrared light range.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide an oxygen-sulfur doped graphite phase carbon nitride quantum dot photodegradation composite layer and a reactor using the same.
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides an oxygen sulphur mixes graphite phase carbon nitride quantum dot photodegradation composite bed, includes basic unit, photochromism layer, buffer layer and photodegradation layer, the basic unit outside is by nearly to being equipped with photochromism layer, buffer layer and photodegradation layer far away.
The base layer is made of resin.
The photochromic layer comprises two colored layers, and the material of each colored layer is one of silver halide, titanium halide, cadmium chloride and copper chloride.
The thickness of the coloring layer is 0.1-200 μm.
The buffer layer is made of one of polyethylene, polystyrene, polytetrafluoroethylene, phenolic resin, polyester resin, polyamide resin, polyformaldehyde, polyamide, polysulfone, polyether, polyvinyl chloride, polypropylene, polycarbonate and ABS resin.
The photodegradation layer is made of oxygen-sulfur doped graphite-phase carbon nitride quantum dots.
The thickness of the photodegradation layer is 200-600 μm.
A reactor comprising the composite layer.
The reactor comprises a reactor cover and a reactor tank body, wherein the reactor tank body is of a hollow structure with an inner layer and an outer layer, the inner layer of the reactor tank body is made of an oxygen-sulfur doped graphite-phase carbon nitride quantum dot photodegradation composite layer material, and the top of the inner layer is provided with a small hole for discharging byproducts into an interlayer.
The bottom of the inner layer is provided with a composition discharge valve, and the bottom of the outer layer is provided with a waste discharge valve.
Compared with the prior art, the utility model adds the oxygen-sulfur doped graphite phase carbon nitride quantum dot photodegradation layer on the basis of the prior art through the design of the composite layer, enhances the light absorption effect of the original photochromic layer, has high hardness and impact resistance brought by the light photodegradation layer, can greatly prolong the service life, can degrade polluted or slightly toxic substances in the environment, and can effectively degrade byproducts generated by reaction in a container and reduce the pollution brought by the reaction by using the reactor of the composite layer.
Drawings
FIG. 1 is a schematic view of a composite layer structure according to the present invention;
FIG. 2 is a schematic diagram of the structure of a reactor according to the present invention;
FIG. 3 is a schematic diagram of the structure of the inner layer of the reactor;
in the figure: 1. a base layer; 2. a photochromic layer; 3. a buffer layer; 4. a photodegradable layer; 5. a reactor inner layer; 6 outer layer of reactor; 7. a reactor bottle cap; 8. a composition discharge valve; 9. and a waste material discharge valve.
Detailed Description
The utility model is further described with reference to specific examples.
As shown in fig. 1, the base layer 1 of the present embodiment is made of polycarbonate, the two photochromic layers of the photochromic layer 2 are made of silver chloride and have a thickness of 100 μm, the buffer layer 3 is made of polyester resin, and the photodegradable layer 4 is made of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots and has a thickness of 1-1000 μm.
The light degradation performance was tested based on the composite layer described above.
And (3) evaluating the catalytic performance of the photodegradation layer by using methyl orange as a target pollutant under the irradiation of visible light. Visible light was simulated by using a 300W Xe lamp as a light source and a 400nm filter to filter out ultraviolet light. The specific experimental process is as follows: weighing 20mg of methyl orange powder, dissolving with deionized water, transferring into a 2L volumetric flask, washing with a constant volume, shaking up to prepare 10mg/L methyl orange solution.
The methyl orange solution is uniformly brushed on the composite layer under the dark condition, the light source is turned on, 4mL samples are taken at regular intervals in the subsequent reaction process, the centrifugation is carried out for 3min at the rotation speed of 13000rpm, the absorbance of the supernatant at the maximum absorption wavelength (463nm) of the methyl orange is measured, and a plurality of parallel experiments are carried out for averaging.
Example 1
Based on the composite layer in the embodiment, the thickness of the photodegradable layer 4 was 1 μm under otherwise unchanged conditions, and the absorbance at the maximum absorption wavelength of methyl orange was measured at 30min, 60min, 90min and 120min, and averaged in a number of parallel experiments.
Example 2
Based on the composite layer in the embodiment, the thickness of the photodegradable layer 4 was 100 μm under otherwise unchanged conditions, and the absorbance at the maximum absorption wavelength of methyl orange was measured at 30min, 60min, 90min and 120min, and averaged in a number of parallel experiments.
Example 3
Based on the composite layer in the embodiment, the thickness of the photodegradable layer 4 was 200 μm under otherwise unchanged conditions, and the absorbance at the maximum absorption wavelength of methyl orange was measured at 30min, 60min, 90min and 120min, and averaged in a number of parallel experiments.
Example 4
Based on the composite layer in the embodiment, the thickness of the photodegradable layer 4 was 500 μm under otherwise unchanged conditions, and the absorbance at the maximum absorption wavelength of methyl orange was measured at 30min, 60min, 90min and 120min, and averaged in a number of parallel experiments.
Example 5
Based on the composite layer in the embodiment, the thickness of the photodegradable layer 4 was 1000 μm under otherwise unchanged conditions, and the absorbance at the maximum absorption wavelength of methyl orange was measured at 30min, 60min, 90min and 120min, and averaged in a number of parallel experiments.
Example 6
Based on the composite layer in the embodiment, the absorbance at the maximum absorption wavelength of methyl orange at 30min, 60min, 90min and 120min was measured without setting the photodegradation layer as a control group under the same conditions, and the average value was obtained by performing parallel experiments for a plurality of times.
The following data were obtained from the above six examples.
C/C0 | 30min | 60min | 90min | 120min |
Example 1 | 0.99 | 0.98 | 0.90 | 0.82 |
Example 2 | 0.98 | 0.91 | 0.80 | 0.70 |
Example 3 | 0.96 | 0.85 | 0.73 | 0.61 |
Example 4 | 0.96 | 0.70 | 0.60 | 0.40 |
Example 5 | 0.96 | 0.68 | 0.55 | 0.40 |
Example 6 | 1 | 1 | 1 | 1 |
Comparing two groups of experiments of 1 mu m and without a photodegradation layer, we can know that the oxygen-sulfur doped graphite phase carbon nitride quantum dots as the photodegradation layer can actually degrade chemical substances and have practical significance for working environments in polluted and slightly toxic environments.
Further comparing four experiments of 1-500 μm, it can be seen that the thickness of the photodegradation layer has significant influence on the degradation performance, after two hours of photodegradation, the degradation removal efficiency can be improved to 60%, and in the actual use, the pollutants contacted by the composite layer flow, so the actual degradation efficiency should be higher than that in the experiments.
Comparing the two groups of 500 μm and 1000 μm, in the degradation reaction comparison of 30-90min, the speed of the photodegradation layer with the thickness of 1000 μm is obviously faster, but the removal efficiency of the two groups is nearly the same at 120min, and compared with the improvement of the degradation speed of 500 μm thickening to 1000 μm, the improvement of the degradation speed of 500 μm thickening to 500 μm is much slower than that of the degradation speed of 100 μm thickening to 500 μm.
Therefore, the degradation rate of the photodegradable layer increases with the increase in thickness, but when the thickness exceeds 500 μm, the relationship between the degradation rate and the increase in thickness is significantly slowed, probably because the excessive thickness of the photodegradable layer covers the active centers of the surface, so that the portion that originally reacts is blocked.
The embodiments described above can be seen that, when the photodegradation layer composed of the oxygen-sulfur-doped graphite-phase carbon nitride quantum dots is applied in the composite layer, the photodegradation layer can provide additional photodegradation effect besides the light absorption of the auxiliary photochromic layer, providing high hardness and providing better flame retardancy, and the increase in the thickness of the photodegradation layer can significantly increase the degradation speed, but the increase in the degradation rate of the excessively thick photodegradation layer becomes slower, so that the desirable range of the photodegradation layer should be 400 μm-600 μm, and unnecessary material waste can be reduced while the degradation efficiency is considered.
Example 7
A reactor using the composite layer of the above embodiment has a structure shown in FIG. 2, a reactor cover 7 is arranged above the reactor cover, an outer reactor layer 6 is made of common light-transmitting material, a reactor inner layer 5 is the composite layer, a gap is formed between the outer layer and the inner layer to form a sandwich structure, the top reactor cover 7 and the outer layer can be sealed, the top of the inner layer is provided with small holes for allowing aerosol byproducts generated by reaction to enter the sandwich between the inner layer and the outer layer, the structure of the inner layer is shown in FIG. 3, the innermost layer is a base layer which does not interfere with the reaction, a photochromic layer, a buffer layer and a photodegradation layer are sequentially arranged outside the base layer, when the byproducts generated by reaction enter the sandwich layer, the photodegradation layer catalyzes the degradation of the byproducts to reduce the pollution of the byproducts to the environment, a composition discharge valve 8 is arranged at the bottom of the inner layer, a waste discharge valve 9 is arranged at the bottom of the outer layer, the waste material discharge valve 9 can be directly opened to discharge the waste material after the byproduct is photodegraded, and the photochromic layer can prevent part of the photochromic layer from performing photochemical reaction with the raw material of the photoreaction and can meet the condition that the reaction condition needs shading.
Therefore, the reactor has good adaptation to the reaction with a large amount of polluting byproducts, can meet the requirement of the reaction under the condition of dark light, and has simple structure and wide application range.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims.
Claims (10)
1. The utility model provides an oxygen sulphur mixes graphite phase carbon nitride quantum dot photodegradation composite bed which characterized in that, includes basic unit, photochromism layer, buffer layer and photodegradation layer, the basic unit outside is by nearly to being equipped with photochromism layer, buffer layer and photodegradation layer far away.
2. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 1, wherein the material of the base layer is resin.
3. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 1, wherein the photochromic layer comprises two colored layers, and the material of the colored layers is one of silver halide, titanium halide, cadmium chloride and copper chloride.
4. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 3, wherein the thickness of the coloring layer is 0.1 μm to 200 μm.
5. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 1, wherein the material of the buffer layer is one of polyethylene, polystyrene, polytetrafluoroethylene, phenolic resin, polyester resin, polyamide resin, polyoxymethylene, polyamide, polysulfone, polyether, polyvinyl chloride, polypropylene, polycarbonate, and ABS resin.
6. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 1, wherein the material of the photodegradable layer is oxygen-sulfur-doped graphite-phase carbon nitride quantum dots.
7. The photodegradable composite layer of oxygen-sulfur-doped graphite-phase carbon nitride quantum dots according to claim 6, wherein the thickness of the photodegradable layer is 200 μm to 600 μm.
8. A reactor comprising the composite layer of any one of claims 1-7.
9. The reactor according to claim 8, comprising a reactor cover and a reactor tank body, wherein the reactor tank body is of a hollow structure with an inner layer and an outer layer, the inner layer of the reactor tank body is made of an oxygen-sulfur doped graphite phase carbon nitride quantum dot photodegradation composite layer material, and the top of the inner layer is provided with a small hole for discharging byproducts into the interlayer.
10. A reactor according to claim 9, wherein the inner layer is provided with a composition outlet valve at the bottom and the outer layer is provided with a waste outlet valve at the bottom.
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CN115109287A (en) * | 2022-07-21 | 2022-09-27 | 西南交通大学 | Preparation method and application of photodegradable nano carbon nitride-polyvinyl chloride composite film |
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CN115109287A (en) * | 2022-07-21 | 2022-09-27 | 西南交通大学 | Preparation method and application of photodegradable nano carbon nitride-polyvinyl chloride composite film |
CN115109287B (en) * | 2022-07-21 | 2023-12-05 | 西南交通大学 | Preparation method and application of photodegradable nano carbon nitride-polyvinyl chloride composite film |
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