CN110589928A - Fixed photocatalyst and preparation method and application thereof - Google Patents
Fixed photocatalyst and preparation method and application thereof Download PDFInfo
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- CN110589928A CN110589928A CN201910899048.3A CN201910899048A CN110589928A CN 110589928 A CN110589928 A CN 110589928A CN 201910899048 A CN201910899048 A CN 201910899048A CN 110589928 A CN110589928 A CN 110589928A
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- photocatalyst
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- titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention provides a fixed photocatalyst and a preparation method and application thereof, belonging to the technical field of water treatment. The preparation method of the fixed photocatalyst provided by the invention comprises the following steps: and adhering the photocatalyst to a glass fiber adhesive tape to obtain the fixed photocatalyst. According to the invention, the photocatalyst is immobilized by using the glass fiber adhesive tape, and the obtained fixed photocatalyst can realize high-efficiency recycling of the photocatalyst on the basis of ensuring the photocatalytic performance, so that not only is secondary pollution of a nano material to a water environment avoided, but also the photocatalyst can be recycled, and the application cost of a photocatalytic technology is reduced. Therefore, the fixed photocatalyst prepared by the method has the characteristics of high photocatalytic efficiency, good application stability, easiness in recycling and the like, can be widely applied to removal of harmful algae in water, and has a good application prospect.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a fixed photocatalyst and a preparation method and application thereof.
Background
With the increasing development and utilization activities of natural resources by human beings, the rapid development of industrial and agricultural production scale causes the drastic change of the structure and the function of the water ecological environment, the eutrophication phenomenon of the water is very serious, so that the abnormal propagation of algae is caused, the rapid reduction of the transparency and the dissolved oxygen amount of the water is caused, fishes and the like die in a large amount, and the water ecological environment is seriously damaged. In the method for removing the harmful algae, the photocatalysis technology has quick effect and high efficiency, can effectively inhibit the growth and the propagation of the water bloom algae, and even gradually degrade the algae cells, algal toxins and other harmful metabolites. However, the traditional titanium dioxide semiconductor photocatalyst has the defects of narrow spectral response range, low quantum efficiency, difficult recovery and the like, so that the traditional titanium dioxide semiconductor photocatalyst is limited in practical application.
The photocatalysis technology is not industrialized on water treatment, and the main problems in the aspect of engineering application are that a part of photocatalyst powder needing to be separated and recovered in a suspension system is lost, and the activity of the recovered catalyst is reduced. Therefore, on the premise of ensuring higher photocatalytic efficiency, how to effectively solve the problem of recycling the photocatalyst becomes a key for applying the photocatalytic technology to the actual water body. The fixed loading technique of the photocatalyst is an effective way to solve the above problems. The method for fixing the photocatalyst is generally divided into a physical loading method and a chemical loading method, wherein the physical loading method does not involve chemical reaction and mainly comprises a powder sintering method and the like, and the chemical loading method utilizes precursor hydrolysis, drying and calcination to carry out film formation. However, the current research results show that the fixed photocatalyst generally has lower photocatalytic efficiency than the suspended photocatalyst, and the improvement of the high efficiency and stability of the fixed photocatalytic material in the application process is the key for popularization and application of the photocatalytic technology.
Disclosure of Invention
The invention aims to provide a fixed photocatalyst and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a fixed photocatalyst, which comprises the following steps: and adhering the photocatalyst to a glass fiber adhesive tape to obtain the fixed photocatalyst.
Preferably, the adhesion is a single layer adhesion and/or a multilayer adhesion.
Preferably, the dosage of the photocatalyst is 0.5-1.5 mg/cm2。
Preferably, the photocatalyst is a visible light responsive photocatalyst.
The invention provides a fixed photocatalyst prepared by the preparation method in the technical scheme, which comprises a glass fiber adhesive tape and a photocatalyst adhered to the surface of the glass fiber adhesive tape.
The invention provides application of the fixed photocatalyst in the scheme in photocatalytic removal of algae.
Preferably, the application comprises the following steps:
mixing the fixed photocatalyst with water containing algae, and carrying out photocatalytic reaction under the illumination condition.
Preferably, the OD of the algae680The value is 0.1 to 0.3, and the number of cells is (1.0 to 4.0) × 106cell/mL, and the chlorophyll concentration is 0.2-0.9 mg/L.
Preferably, the concentration of the fixed photocatalyst in the water body is 0.1-0.3 g/L based on the mass of the photocatalyst in the fixed photocatalyst.
Preferably, the photocatalytic reaction is carried out under a stirring condition, and the stirring speed is 300-500 rpm.
The invention provides a preparation method of a fixed photocatalyst, which comprises the following steps: and adhering the photocatalyst to a glass fiber adhesive tape to obtain the fixed photocatalyst. According to the invention, the photocatalyst is immobilized by using the glass fiber adhesive tape, and the obtained fixed photocatalyst can realize high-efficiency recycling of the photocatalyst on the basis of ensuring the photocatalytic performance, so that not only is secondary pollution of a nano material to a water environment avoided, but also the photocatalyst can be recycled, and the application cost of a photocatalytic technology is reduced. Therefore, the fixed photocatalyst prepared by the method has the characteristics of high photocatalytic efficiency, good application stability, easiness in recycling and the like, can be widely applied to removal of harmful algae in water, and has a good application prospect.
Drawings
FIG. 1 is a diagram showing the effect of the suspended and fixed black titanium dioxide photocatalyst prepared in example 1 of the present invention in removing harmful algae in the PBS-prepared algae solution;
FIG. 2 is a photograph of the fixed black titanium dioxide photocatalyst prepared in example 1 of the present invention after being reused 4 times;
FIG. 3 is a diagram showing the effect of the suspended and fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention in removing harmful algae in the solution of PBS;
FIG. 4 is a photograph of the fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention after being reused for 3 times;
fig. 5 is a comparison graph of the algae removal effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention in a PBS solution prepared in a laboratory and in an actual surface water body.
Detailed Description
The invention provides a preparation method of a fixed photocatalyst, which comprises the following steps: and adhering the photocatalyst to a glass fiber adhesive tape to obtain the fixed photocatalyst.
The invention has no special requirements on the type of the photocatalyst, and any kind of photocatalyst can be used. In order to make the prepared fixed photocatalyst fully utilize sunlight, the photocatalyst is preferably a visible light-responsive photocatalyst. In a specific embodiment of the present invention, the photocatalyst is a black titanium dioxide photocatalyst or a black titanium dioxide/silver phosphate composite photocatalyst. The source of the photocatalyst is not particularly required in the present invention, and the photocatalyst from a source well known in the art can be obtained, specifically, commercially available or prepared by itself.
The invention has no special requirements on the specific implementation mode of the adhesion, and any mode can be used for realizing the uniform adhesion of the photocatalyst to the glass fiber adhesive tape. In the embodiment of the invention, the photocatalyst is uniformly arranged on the surface of the smooth glass, and then the glass fiber tape is used for sticking. In the present invention, the adhesion is preferably a single layer adhesion and/or a multi-layer adhesion, more preferably a single layer adhesion. When the single-layer adhesion is adopted, the fixation of the glass fiber adhesive tape to the photocatalyst is more favorably improved. The invention does not intentionally carry out multilayer adhesion, and the situation of multilayer adhesion is inevitable in the process of single-layer adhesion. In the adhesion process, the invention ensures that the photocatalyst is uniformly distributed as much as possible and the condition that no adhesive substance is exposed outside as much as possible. When the viscous substances are exposed, the glass fiber adhesive tape is easy to age and fall off under the illumination or part of the viscous substances are degraded in water, so that the total organic carbon in the water body can be increased.
The source of the glass fiber adhesive tape is not particularly required in the invention, and commercial products well known in the field can be adopted. The specification of the glass fiber adhesive tape has no special requirement, and the skilled person can select the glass fiber adhesive tape according to the water body amount to be treated. In a specific embodiment of the invention, the glass fiber adhesive tape is a rectangular adhesive tape with a length of 10cm and a width of 2 cm. The glass fiber adhesive tape has the advantages of high tensile strength, high temperature resistance, corrosion resistance and aging resistance, and importantly, the light transmittance of the glass fiber adhesive tape is better than that of a common adhesive tape, so that the glass fiber adhesive tape is more beneficial to absorption and utilization of visible light by a photocatalyst and has stronger adhesion.
In the invention, the dosage of the photocatalyst is preferably 0.5-1.5 mg/cm2More preferably 0.8 to 1.3mg/cm2。
According to the invention, the photocatalyst is immobilized by using the glass fiber adhesive tape, and the obtained fixed photocatalyst can realize high-efficiency recycling of the photocatalyst on the basis of ensuring the photocatalytic performance, so that not only is secondary pollution of a nano material to a water environment avoided, but also the photocatalyst can be recycled, and the application cost of a photocatalytic technology is reduced.
The invention provides a fixed photocatalyst prepared by the preparation method in the scheme, which comprises a glass fiber adhesive tape and a photocatalyst adhered to the surface of the glass fiber adhesive tape. The fixed photocatalyst has the characteristics of high photocatalytic efficiency, good application stability, easiness in recycling and the like, can be widely applied to removal of harmful algae in water, and has a good application prospect.
The invention provides application of the fixed photocatalyst in the scheme in photocatalytic removal of algae. In the present invention, the application preferably comprises the steps of: mixing the fixed photocatalyst with water containing algae, and carrying out photocatalytic reaction under the illumination condition. According to the invention, the concentration of the fixed photocatalyst in a water body is 0.1-0.3 g/L based on the mass of the photocatalyst in the fixed photocatalyst, and the algae is preferably microcystis aeruginosa; OD of the algae680The value is preferably 0.1 to 0.3, and the number of cells is preferably (1.0 to 4.0) × 106The concentration of the chlorophyll is preferably 0.2-0.9 mg/L.
In the invention, the temperature of the photocatalytic reaction is preferably 25-30 ℃; the time of the photocatalytic reaction is preferably 8-10 h. The photocatalytic reaction is preferably carried out under the condition of stirring, and the stirring speed is preferably 300-500 rpm. When the photocatalytic reaction is performed, the present invention preferably directs the surface of the glass fiber tape to which the photocatalyst is adhered toward the algae-containing water body.
The illumination condition is determined according to the type of the photocatalyst in the fixed photocatalyst, and if the photocatalyst is in ultraviolet response, the ultraviolet illumination condition is provided; if the photocatalyst is visible light responsive, visible light is provided. In a specific embodiment of the present invention, the illumination condition is visible light, specifically, a xenon lamp is used as a light source, and a cut-off filter is used to obtain visible light with a wavelength greater than 420 nm.
The fixed photocatalyst provided by the present invention, the preparation method and the application thereof are described in detail below with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The photocatalyst used for preparing the fixed photocatalyst is black titanium dioxide, and the preparation of the black titanium dioxide comprises the following steps:
(1) weighing 0.6g of urea, adding the urea into 20mL of absolute ethyl alcohol, stirring at 400rpm for 1h, then adding 14mL of tetrabutyl titanate, and continuing stirring at 400rpm for 1h to form a solution A;
(2) 1mL of concentrated hydrochloric acid, 5mL of deionized water and 20mL of absolute ethyl alcohol are stirred at 400rpm for 1h to form a solution B;
(3) dropwise adding the solution B into the solution A (3-4 mL/min), and stirring with a glass rod to form a white colloidal substance;
(4) drying the white colloidal substance in an oven at 80 ℃ for 12h, and grinding to form a powdery white substance;
(5) and (3) putting the white substance into a tube furnace in nitrogen atmosphere, heating to 500 ℃ at a temperature of 4 ℃/min, and preserving heat for 2h to form powdery black titanium dioxide.
Preparation of fixed photocatalyst:
weighing 0.02g of the powder black titanium dioxide, intercepting a glass fiber adhesive tape with the length of 10cm and the width of 2cm, uniformly dispersing the powder black titanium dioxide, placing the powder black titanium dioxide on the surface of smooth glass, sticking the glass fiber adhesive tape to ensure that the surface of the glass fiber adhesive tape is uniformly adhered with the photocatalyst and no adhesive substance is exposed outside, and finally preparing the fixed black titanium dioxide photocatalyst.
Example 2
The photocatalyst used for preparing the fixed photocatalyst is a black titanium dioxide/silver phosphate composite photocatalyst, and the preparation of the black titanium dioxide/silver phosphate composite photocatalyst comprises the following steps:
(1) weighing 0.6g of urea, adding the urea into 20mL of absolute ethyl alcohol, stirring at 400rpm for 1h, then adding 14mL of tetrabutyl titanate, and continuing stirring at 400rpm for 1h to form a solution A;
(2) 1mL of concentrated hydrochloric acid, 5mL of deionized water and 20mL of absolute ethyl alcohol are stirred at 400rpm for 1h to form a solution B;
(3) dropwise adding the solution B into the solution A (3-4 mL/min), and stirring with a glass rod to form a white colloidal substance;
(4) drying the white colloidal substance in an oven at 80 ℃ for 12h, and grinding to form a powdery white substance;
(5) and (3) placing the white substance into a tubular furnace in nitrogen atmosphere, heating to 500 ℃ at a temperature of 4 ℃/min, and preserving heat for 2h to form the nitrogen-doped powdery black titanium dioxide.
(6) 0.2g of black titanium dioxide powder was dispersed in 40mL of water by sonication for 3h, after which 60mL of 0.03M silver acetate was added thereto and magnetically stirred for 1h, then 4mL of 0.15M disodium hydrogen phosphate solution was added dropwise to the above solution and stirred at 400rpm for 2h to form a precipitate. And centrifuging the obtained mixture at 5000rpm, cleaning, drying at 80 ℃ in vacuum, and grinding to obtain powder which is the black titanium dioxide/silver phosphate composite photocatalyst.
Preparation of fixed photocatalyst:
weighing 0.02g of the powder black titanium dioxide/silver phosphate composite photocatalyst, intercepting a glass fiber tape with the length of 10cm and the width of 2cm, uniformly dispersing the powder black titanium dioxide/silver phosphate composite photocatalyst on the surface of smooth glass, sticking the powder black titanium dioxide/silver phosphate composite photocatalyst by using the glass fiber tape to ensure that the photocatalyst is uniformly stuck on the surface of the glass fiber tape and no adhesive substance is exposed outside, and finally preparing the fixed black titanium dioxide/silver phosphate composite photocatalyst.
Application example 1
Examining the algae removal effect and the recycling effect of the fixed black titanium dioxide photocatalyst in the algae solution prepared by PBS (phosphate buffered saline) of the fixed black titanium dioxide photocatalyst and the suspended black titanium dioxide photocatalyst prepared in example 1, the method comprises the following steps: :
20mg of the black titanium dioxide powder prepared in example 1 was added directly to 100mL of OD680Mixing with 0.2 algae solution; the fixed black titanium dioxide photocatalyst prepared in example 1 was placed in 100mL OD680In the algae liquor with the value of 0.2, the algae liquor is spirally folded and attached to the lower pipe wall of the reactor and is adhered withOne side of the photocatalytic material faces the reaction liquid, and the two groups are placed in a xenon lamp (lambda)>420nm and 50W of optical power), carrying out photocatalytic reaction for 10 hours at 25 ℃ and 400rpm to finish the removal of the microcystis aeruginosa, and taking the chlorophyll content in the algae cells as an investigation index.
After the reaction, the immobilized black titanium dioxide photocatalyst was washed with clean water 3 times, and placed in fresh algal solution again for repeated tests.
FIG. 1 shows the effect of the black titanium dioxide photocatalyst in suspension and stationary form prepared in example 1 of the present invention in removing harmful algae in the algae solution prepared from PBS. As can be seen from FIG. 1, in the first 2h reaction process, the suspended black titanium dioxide rapidly reduces the chlorophyll content in the water body through the adsorption effect, the removal rate reaches 36.0%, while the fixed black titanium dioxide does not exert the adsorption capacity similar to that of the suspended black titanium dioxide in the initial stage, but the final photocatalytic algae removal effect is not obviously reduced. After the reaction is carried out for 10 hours, the algae removal rate of the suspended black titanium dioxide is 72.5 percent, and the algae removal rates of the fixed black titanium dioxide which is repeatedly utilized for 4 times are 70.5 percent, 68.9 percent, 67.1 percent and 66.9 percent respectively.
FIG. 2 is a photograph of the fixed type black titanium dioxide photocatalyst prepared in example 1 of the present invention after being reused 4 times, and it can be seen from FIG. 2 that the black titanium dioxide is uniformly distributed on the glass fiber tape, and no material falling off is observed after the repeated reaction.
From the results shown in fig. 1-2, the invention fixes the black titanium dioxide responding to visible light through the simple glass fiber adhesive tape, and is used for removing harmful algae in the water body, compared with the algae removing effect of the suspended black titanium dioxide, the algae removing effect of the fixed black titanium dioxide is not obviously reduced, and the fixed black titanium dioxide has good stability, can be repeatedly used, does not cause the shedding of the photocatalyst, and can be stably applied to the algae removing process of the water body for a long time.
Application example 2
Investigating the algae removal effect of the fixed and suspended black titanium dioxide/silver phosphate composite photocatalyst in the PBS prepared algae liquid and the recycling effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst, comprising the following steps: :
two portions of 20mg of the powdered black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 were taken, and one portion was added directly to 100mL of OD680Mixing with 0.2 algae solution; another portion was fixed to a 10cm long glass fiber tape and placed at 100mL OD680The solution is spirally folded and adhered to the lower tube wall of the reactor, and the side adhered with the photocatalytic material faces the reaction solution, and is placed in xenon lamp (lambda)>420nm and 50W of optical power), carrying out photocatalytic reaction for 8 hours at 25 ℃ and 400rpm to finish the removal of the microcystis aeruginosa, and taking the chlorophyll content in the algae cells as an investigation index.
After the reaction is finished, the immobilized black titanium dioxide/silver phosphate composite photocatalyst is washed by clear water for 3 times, and is placed in fresh algae liquid again for repeated tests.
FIG. 3 shows the effect of the suspended and fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention in removing harmful algae in the algae solution prepared from PBS. As can be seen from FIG. 3, the algae chlorophyll removal rate of the suspended black titanium dioxide/silver phosphate composite photocatalyst reaches 98.1% after 8 hours of reaction, while the removal efficiency of the fixed black titanium dioxide/silver phosphate composite photocatalyst is not reduced too much than that of the suspended black titanium dioxide/silver phosphate composite photocatalyst, and after 8 hours of reaction, the algae removal rate of the fixed black titanium dioxide/silver phosphate composite photocatalyst reaches 90.8% and is reduced by only 7.3%. After the fixed black titanium dioxide/silver phosphate composite photocatalyst is repeatedly used for three times, the algae removal rate after 8 hours of reaction can still reach 85.4 percent, which is reduced by 5.4 percent compared with the algae removal rate of the first fixed catalyst, and the fixed photocatalyst can be repeatedly and stably used.
Fig. 4 is a photograph of the fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention after being reused for 3 times, and it can be seen from fig. 4 that the black titanium dioxide/silver phosphate is uniformly distributed on the glass fiber tape, and no material drop is seen after the repeated reaction.
From the results shown in fig. 3 to 4, the invention fixes the black titanium dioxide/silver phosphate responding to visible light through the simple glass fiber adhesive tape, and is used for removing harmful algae in the water body, compared with the algae removing effect of the suspended black titanium dioxide/silver phosphate, the algae removing effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst is not obviously reduced, and the fixed black titanium dioxide/silver phosphate composite photocatalyst has good stability, can be repeatedly used, does not cause the shedding of the photocatalyst, and can be stably applied to the algae removing process of the water body for a long time.
Application example 3
The method for investigating the algae removal effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst in laboratory water distribution and actual surface water comprises the following steps:
two portions of the fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 were taken, and one portion was added to 100mL of OD680In the algae solution prepared by PBS with the value of 0.2, spirally folding and pasting the algae solution on the pipe wall at the lower part of the reactor, wherein the side adhered with the photocatalyst faces to the reaction solution; the other was placed in 100mL OD680The solution was folded and adhered to the lower wall of the reactor, and the photocatalyst-adhered side was directed toward the reaction solution, and placed in a xenon lamp (lambda.) (with a value of 0.2) in the solution prepared from the actual surface water>420nm and 50W of optical power), carrying out photocatalytic reaction for 8 hours at 25 ℃ and 400rpm to finish the removal of the microcystis aeruginosa, and taking the chlorophyll content in the algae cells as an investigation index.
Fig. 5 is a comparison graph of the algae removal effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst prepared in example 2 of the present invention in a PBS solution prepared in a laboratory and in an actual surface water body. As can be seen from fig. 5, the components contained in the actual water body are more complex, and the contained trace organic pollutants are more, so that the algae removal effect of the fixed black titanium dioxide/silver phosphate composite photocatalyst in the actual water body is slightly lower than that of the laboratory PBS solution, but the algae removal efficiency is not much reduced, after 8 hours of reaction, the algae removal rate in the PBS solution can reach 90.8%, and the algae removal rate in the actual surface water body can reach 86.8%, which is reduced by 4%. Therefore, the fixed photocatalyst has good application effect in the actual water body, and can achieve the effects of removing algae and inhibiting algae.
From the above embodiments, the invention provides a fixed photocatalyst, and a preparation method and an application thereof, and compared with the prior art, the fixed photocatalyst has the following advantages:
(1) in the invention, the used fixed photocatalyst can realize the fixation, no leakage and repeated use of the photocatalyst by using a new simple fixing mode, and is a novel fixed photocatalyst;
(2) the fixed photocatalyst utilized in the invention can utilize solar energy of clean energy to effectively remove typical harmful algae in water, and has the advantages of simple process, low treatment cost, high treatment efficiency, low energy consumption, high safety, no secondary pollution, convenient recycling and the like;
(3) the fixed photocatalyst is used for treating typical harmful algae pollution in water, the method is simple to operate, the reaction condition is mild, the in-situ remediation of the polluted water can be realized, and the persistent algae removal and inhibition effect is maintained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a fixed photocatalyst is characterized by comprising the following steps: and adhering the photocatalyst to a glass fiber adhesive tape to obtain the fixed photocatalyst.
2. The method of claim 1, wherein the adhesion is a single layer adhesion and/or a multi-layer adhesion.
3. The method according to claim 1, wherein the photocatalyst is used in an amount of 0.5 to 1.5mg/cm2。
4. The method of claim 1, wherein the photocatalyst is a visible light-responsive photocatalyst.
5. The fixed photocatalyst prepared by the preparation method of any one of claims 1 to 4, which is characterized by comprising a glass fiber tape and a photocatalyst adhered to the surface of the glass fiber tape.
6. Use of the fixed photocatalyst according to claim 5 for photocatalytic removal of algae.
7. The application according to claim 6, characterized in that it comprises the following steps:
mixing the fixed photocatalyst with water containing algae, and carrying out photocatalytic reaction under the illumination condition.
8. The use of claim 7, wherein the OD of the algae is680The value is 0.1 to 0.3, and the number of cells is (1.0 to 4.0) × 106cell/mL, and the chlorophyll concentration is 0.2-0.9 mg/L.
9. The use of claim 7, wherein the concentration of the fixed photocatalyst in the water is 0.1-0.3 g/L based on the mass of the fixed photocatalyst.
10. The use according to claim 7, wherein the photocatalytic reaction is carried out under stirring conditions, wherein the stirring speed is 300-500 rpm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111285429A (en) * | 2020-02-29 | 2020-06-16 | 西南石油大学 | Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof |
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