CN108325564B - Flexible TiO with visible light catalytic performance2/PVDF@MoS2Composite nanofiber and preparation method thereof - Google Patents
Flexible TiO with visible light catalytic performance2/PVDF@MoS2Composite nanofiber and preparation method thereof Download PDFInfo
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- 239000002033 PVDF binder Substances 0.000 title claims abstract description 84
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 79
- 239000002121 nanofiber Substances 0.000 title claims abstract description 49
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 229910052961 molybdenite Inorganic materials 0.000 claims abstract description 59
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 59
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002131 composite material Substances 0.000 claims abstract description 44
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- APQHKWPGGHMYKJ-UHFFFAOYSA-N Tributyltin oxide Chemical compound CCCC[Sn](CCCC)(CCCC)O[Sn](CCCC)(CCCC)CCCC APQHKWPGGHMYKJ-UHFFFAOYSA-N 0.000 claims abstract description 20
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- 235000015393 sodium molybdate Nutrition 0.000 claims description 9
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- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 9
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- FDPIMTJIUBPUKL-UHFFFAOYSA-N dimethylacetone Natural products CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 claims description 5
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
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- B01J35/23—
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- B01J35/39—
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/342—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electric, magnetic or electromagnetic fields, e.g. for magnetic separation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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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
- C02F2101/00—Nature of the contaminant
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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
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- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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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
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- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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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
Flexible TiO with visible light catalytic performance2/PVDF@MoS2Composite nano-fiber and preparation method thereof, and flexible TiO2/PVDF@MoS2The composite nano-fiber is prepared by preparing TBOT/PVDF fiber by an electrostatic spinning method and then synthesizing flexible TiO by a hydrothermal method2/PVDF@MoS2Composite nano-fiber, said flexible TiO2/PVDF@MoS2The composite nano fiber is core-shell structure fiber, and the inner layer is TiO2PVDF fiber inner core, outer layer distributed with MoS2Small particles. Flexible TiO prepared by the invention2/PVDF@MoS2The composite nanofiber is a core-shell structure fiber, has controllable morphology, has the advantages of flexibility, visible light catalytic performance, simple separation and recovery and reusability, is simple in preparation process and mild in experimental conditions, and provides an effective method for obtaining a novel flexible fibrous visible light catalyst.
Description
Technical Field
The invention relates to a preparation method of a photocatalyst, in particular to flexible TiO with visible light catalytic performance2/PVDF@MoS2A method for preparing composite nano-fiber.
Background
The photocatalysis technology as an efficient, economic and environment-friendly 'green' technology provides great potential for environmental protection and energy conversion. One of the major strategies to address the current global environmental demands is by the production of advanced photocatalytic materials. In the past decades, titanium dioxide has proven to be a promising candidate for photocatalysts in a variety of transition metal oxide semiconductors due to its good physicochemical properties, non-toxicity, low cost, chemical and photonic stability. However, as an n-type wide band gap semiconductor, titanium dioxide can only absorb ultraviolet light, which in the solar spectrum is only 4% of the total sunlight. In addition, TiO2The photo-generated electron hole recombination rate is high, so that the quantum efficiency is low and the photocatalytic activity is low. In addition, the powdered photocatalyst is difficult to separate and recover after the catalytic reaction is finished, and is easy to cause secondary pollution. Thus, preparation of highly active recyclable TiO2The key factors of the base photocatalyst are to find a strategy for inhibiting recombination of photo-generated electron-hole pairs, reducing band gaps and facilitating separation and recovery. To achieve this, impurity doping and TiO-based are included2Have been developed with the aim of increasing the TiO by extending its light trapping window into the visible range and reducing the rate of photogenerated electron-hole recombination2The photocatalytic efficiency of the base photocatalyst. In addition, in order to improve the recovery and separation of the photocatalyst, researchersIt is proposed that the photocatalytic material is supported on an inorganic porous material or a polymer material for recycling.
Disclosure of Invention
The invention aims to provide flexible TiO with visible light catalytic capability2/PVDF@MoS2Composite nano-fiber and preparation method thereof, and flexible TiO prepared by method2/PVDF@MoS2The composite nanofiber has the advantages of flexibility, visible light catalytic performance, simplicity in separation and recovery and reusability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
flexible TiO with visible light catalytic performance2/PVDF@MoS2Composite nano-fiber, characterized in that, the flexible TiO is2/PVDF@MoS2The composite nano-fiber is prepared by preparing TBOT/PVDF fiber by an electrostatic spinning method and then synthesizing flexible TiO by a hydrothermal method2/PVDF@MoS2Composite nano-fiber, said flexible TiO2/PVDF@MoS2The composite nano fiber is core-shell structure fiber, and the inner layer is TiO2PVDF fiber inner core, outer layer distributed with MoS2Small particles.
The invention also discloses the flexible TiO with visible light catalytic performance2/PVDF@MoS2The preparation method of the composite nanofiber comprises the following steps:
(1) dissolving PVDF in an organic solution, stirring, adding a TBOT solution, and continuously stirring to obtain a spinning precursor solution;
(2) performing electrostatic spinning on the TBOT/PVDF spinning precursor solution prepared in the step (1) to obtain a fiber membrane;
(3) drying the fiber film obtained in the step (2), and cutting into pieces;
(4) preparing a mixed solution of protonic acid, sodium molybdate and thiourea, moving the mixed solution into a hydrothermal kettle, and adding the fiber membrane cut in the step (3);
(5) sealing the hydrothermal kettle obtained in the step (4), heating in an oven, cooling, and washing the obtained material to obtain the flexible Ti with visible light catalytic performanceO2/PVDF@MoS2And (3) compounding the nano fibers.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2The preparation method of the composite nanofiber comprises the steps of (1) preparing a polymer solution with PVDF content of 16.7% by mass and a solvent of a DMF and acetone mixed solution, stirring the polymer solution at 40 ℃ for 2 hours, adding a TBOT solution in a certain proportion, and continuously stirring the mixture for 1 hour to obtain a TBOT/PVDF spinning precursor solution.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2The preparation method of the composite nanofiber comprises the steps of (1) weighing 4g of PVDF in a mixed solution of 20g of DMF and acetone at normal temperature, stirring for 2h at 40 ℃, adding 10mL of TBOT solution, and continuously stirring for 1h to obtain a TBOT/PVDF spinning precursor solution.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2In the step (1), the mass ratio of DMF to acetone is 1: 1.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2The preparation method of the composite nanofiber comprises the following steps of (2) placing the spinning precursor solution prepared in the step (1) into a spinning solution container under the normal temperature condition, connecting a jet orifice of a metal spray head with the positive electrode of a direct-current high-voltage power supply, applying high voltage, and collecting the spinning precursor solution through a roller frame collecting device, wherein the spinning voltage is 9kV, and the spinning distance is 11 cm.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2And (3) drying the fiber membrane obtained in the step (2) in a 60 ℃ oven for 10h, taking out, and cutting into square chips of 2cm multiplied by 2 cm.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2The preparation method of the composite nanofiber comprises the step (4) of weighing 25mL of deionized water and 1mL of sulfuric acid solution, adding the deionized water and the sulfuric acid solution into a container, and then adding 0.12g of the di-cellulose while stirringAnd (3) adding sodium molybdate and 0.20g of thiourea into water, continuously stirring for 30min to obtain a mixed solution of sulfuric acid, sodium molybdate and thiourea, moving the mixed solution into a hydrothermal kettle, and placing the fiber membrane cut in the step (3) into the mixed solution of the hydrothermal kettle.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS224mL of deionized water and 2mL of hydrochloric acid solution are weighed in the step (4), added into a container, then 0.12g of sodium molybdate dihydrate and 0.20g of thiourea are added while stirring, stirring is continued for 30min to obtain a mixed solution of hydrochloric acid, sodium molybdate and thiourea, the mixed solution is moved into a hydrothermal kettle, and then the fiber membrane cut in the step (3) is placed into the mixed solution of the hydrothermal kettle.
The flexible TiO with visible light catalytic performance is as described above2/PVDF@MoS2And (5) sealing the hydrothermal kettle in an oven, heating to 150 ℃ and keeping for 24 hours, naturally cooling, repeatedly washing the obtained material with absolute ethyl alcohol and deionized water for multiple times to obtain the flexible TiO with visible light catalytic performance2/PVDF@MoS2And (3) compounding the nano fibers.
The invention has the beneficial effects that:
(1) the preparation method disclosed by the invention is simple in preparation process, mild in experimental conditions, easily available in experimental raw materials and low in cost, and firstly, the TBOT/PVDF fiber is prepared by using an electrostatic spinning method, and then the flexible TiO is synthesized in one step by using a hydrothermal method2/PVDF@MoS2Composite nano-fiber, said flexible TiO2/PVDF@MoS2The composite nano fiber is core-shell structure fiber, and the inner layer is TiO2PVDF fiber inner core, outer layer distributed with MoS2Small particles and regular and controllable appearance.
(2) The flexible TiO prepared by the invention2/PVDF@MoS2The composite nano-fiber is of a non-woven fabric structure, has the characteristics of flexibility, recoverability and reutilization, and makes up for the defect of difficulty in separating and recovering the powdery photocatalyst.
(3) The flexible TiO prepared by the invention2/PVDF@MoS2Composite nanoThe rice fiber has better catalytic performance on rhodamine B under the irradiation of a white light LED, and can be further applied to the catalytic degradation of other dyes.
Drawings
FIG. 1 shows the flexible TiO obtained in example 12/PVDF@MoS2Scanning electron microscopy of the composite nanofibers;
FIG. 2 shows the flexible TiO obtained in example 12/PVDF@MoS2Transmission electron microscopy of composite nanofibers;
FIG. 3 shows the flexible TiO obtained in example 12/PVDF@MoS2And (3) a degradation curve of catalytic degradation of rhodamine B by the composite nanofiber.
Detailed Description
The invention will be better understood from the following examples. However, one skilled in the art will readily appreciate that the specific material proportions, process conditions, and results thereof described in the examples are illustrative only and should not, nor should they, limit the invention as detailed in the claims.
Example 1
Flexible TiO with visible light catalytic performance2/PVDF@MoS2The preparation method of the composite nanofiber comprises the following steps:
(1) preparing 16.7 mass percent of PVDF solution, wherein the solvent is 24g of a DMF (dimethyl formamide) and acetone mixed solution, 4g of PVDF, 20g of the DMF and acetone mixed solution and the mass percent of DMF to acetone is 1:1, stirring the solution at 40 ℃ for 2h by using a magnetic stirrer, then adding 10mL of TBOT solution into a container, and continuously stirring for 1h to obtain a TBOT/PVDF spinning precursor solution;
(2) the prepared solution is used for electrostatic spinning, wherein the spinning voltage is 9kV, and the spinning distance is 11 cm. Spinning the solution into fibers, collecting the fibers by a roller, and finally depositing to obtain a fiber membrane;
(3) drying the fiber membrane obtained in the step (2) in an oven at 60 ℃ for 10h, and then cutting the fiber membrane into square small pieces of 2cm multiplied by 2 cm;
(4) weighing 25mL of deionized water and 1mL of sulfuric acid solution at normal temperature, adding the deionized water and the sulfuric acid solution into a container, then adding 0.12g of sodium molybdate dihydrate and 0.20g of thiourea while stirring, continuing stirring for 30min to obtain a mixed solution of sulfuric acid, sodium molybdate and thiourea, moving the mixed solution into a hydrothermal kettle, and placing the square small pieces cut in the step (3) into the mixed solution of the hydrothermal kettle;
(5) sealing the hydrothermal kettle, heating in an electric oven at 150 deg.C for 24h, naturally cooling, repeatedly washing the obtained material with anhydrous ethanol and deionized water for multiple times to obtain flexible TiO2/PVDF@MoS2And (3) compounding the nano fibers.
FIG. 1 shows a flexible TiO obtained in this example2/PVDF@MoS2The composite nanometer fiber has a magnification of 2000 times, and the flexible TiO has a high sensitivity2/PVDF@MoS2The composite nano-fiber is distributed in a disordered shape and has a non-woven fabric structure.
FIG. 2 shows a flexible TiO obtained in the present example2/PVDF@MoS2The composite nanofiber transmission electron microscope image has a magnification of 80000 times, and it can be seen from the image that the fiber is mainly composed of an inner layer and an outer layer, and the inner layer is relatively uniform TiO2PVDF fiber core with multiple MoS layers2Small particles to form TiO2/PVDF@MoS2A core-shell structure.
FIG. 3 shows a flexible TiO obtained in the present example2/PVDF@MoS2The degradation curve of rhodamine B catalyzed degradation by composite nano-fiber is obtained by mixing the flexible TiO2/PVDF@MoS2The composite nanofiber is immersed in a 60mL quartz beaker containing 15mg/L rhodamine B solution and is irradiated by a 9W white light LED lamp. The left side of the black dotted line in the figure is that the reaction system is stirred for 45 minutes under the dark state condition, so that the reaction system reaches the adsorption-desorption equilibrium. The flexible TiO can be seen2/PVDF@MoS2The composite nanofiber has 23.8% of adsorption rate in a dark state. On the right side of the black dotted line, a 9W white LED lamp is used as a visible light source for irradiation, and after 120 minutes, the degradation rate of rhodamine B reaches 82.2 percent, which indicates that the flexible TiO is2/PVDF@MoS2The composite nano-fiber has visible light catalytic capability on one hand and has faster dye under the irradiation of a 9W white light LED on the other handAnd (4) degradation rate.
Flexible TiO made in this example2/PVDF@MoS2TiO in composite nano-fiber2The crystal form of (A) is anatase type.
Example 2
Flexible TiO with visible light catalytic performance2/PVDF@MoS2The preparation method of the composite nanofiber comprises the following steps:
(1) preparing 16.7 mass percent of PVDF solution, wherein the solvent is 24g of a DMF (dimethyl formamide) and acetone mixed solution, 4g of PVDF, 20g of the DMF and acetone mixed solution and the mass percent of DMF to acetone is 1:1, stirring the solution at 40 ℃ for 2h by using a magnetic stirrer, then adding 10mL of TBOT solution into a container, and continuously stirring for 1h to obtain a TBOT/PVDF spinning precursor solution;
(2) the prepared solution was used for electrospinning. Wherein the spinning voltage is 9kV, and the spinning distance is 11 cm. Spinning the solution into fibers, collecting the fibers by a roller, and finally depositing the fibers into a fiber film;
(3) drying the obtained TBOT/PVDF fiber membrane in a 60 ℃ oven for 10h, and then cutting the membrane into square pieces of 2cm multiplied by 2 cm;
(4) weighing 24mL of deionized water and 2mL of hydrochloric acid solution at normal temperature, adding the deionized water and 2mL of hydrochloric acid solution into a container, then adding 0.12g of sodium molybdate dihydrate and 0.20g of thiourea while stirring, continuing stirring for 30min to obtain a mixed solution of hydrochloric acid, sodium molybdate and thiourea, moving the mixed solution into a hydrothermal kettle, and placing the square small pieces cut in the step (3) into the mixed solution of the hydrothermal kettle;
(5) sealing the hydrothermal kettle, heating in an electric oven at 150 deg.C for 24h, naturally cooling, repeatedly washing the obtained material with anhydrous ethanol and deionized water for multiple times to obtain flexible TiO2/PVDF@MoS2And (3) compounding the nano fibers.
Flexible TiO made in this example2/PVDF@MoS2TiO in core-shell structure fiber2The crystal form of (A) is rutile ore type.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and equivalent changes and modifications made according to the spirit of the present invention should be covered thereby.
Claims (9)
1. Flexible TiO with visible light catalytic performance2/PVDF@MoS2The preparation method of the composite nanofiber is characterized by comprising the following steps of:
(1) dissolving PVDF in an organic solution, stirring, adding a TBOT solution, and continuously stirring to obtain a spinning precursor solution;
(2) performing electrostatic spinning on the TBOT/PVDF spinning precursor solution prepared in the step (1) to obtain a fiber membrane;
(3) drying the fiber film obtained in the step (2), and cutting into pieces;
(4) preparing a mixed solution of protonic acid, sodium molybdate and thiourea, moving the mixed solution into a hydrothermal kettle, and adding the fiber membrane cut in the step (3);
(5) sealing the hydrothermal kettle obtained in the step (4), heating in an oven, cooling, and washing the obtained material to obtain the flexible TiO with visible light catalytic performance2/PVDF@MoS2The composite nano fiber is a core-shell structure fiber, and the inner layer is TiO2PVDF fiber inner core, outer layer distributed with MoS2Small particles.
2. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that the mass percentage content of PVDF prepared in the step (1) is 16.7%, the solvent is a high-molecular solution of a DMF (dimethyl formamide) and acetone mixed solution, stirring is carried out for 2 hours at 40 ℃, then a TBOT solution with a certain proportion is added, and stirring is carried out continuously for 1 hour, so as to obtain a TBOT/PVDF spinning precursor solution.
3. The flexible TiO of claim 2 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that in the step (1), 4g of PVDF powder is weighed at normal temperature, dissolved in a mixed solution of 20g of DMF and acetone, stirred at 40 ℃ for 2h, then 10mL of TBOT solution is added, and stirring is continued for 1h, so that a TBOT/PVDF spinning precursor solution is obtained.
4. A flexible TiO with visible light catalytic properties as claimed in claim 32/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that in the step (1), the mass ratio of DMF to acetone is 1: 1.
5. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that in the step (2), the spinning precursor solution prepared in the step (1) is placed in a spinning solution container under the normal temperature condition, a jet orifice of a metal nozzle is connected with the positive pole of a direct-current high-voltage power supply, high voltage is applied, and collection is carried out through a roller frame collection device, wherein the spinning voltage is 9kV, and the spinning distance is 11 cm.
6. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that in the step (3), the fiber membrane obtained in the step (2) is placed in a 60 ℃ oven to be dried for 10 hours, taken out and cut into square small pieces of 2cm multiplied by 2 cm.
7. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that 25mL of deionized water and 1mL of sulfuric acid solution are weighed in the step (4), added into a container, then 0.12g of sodium molybdate dihydrate and 0.20g of thiourea are added while stirring, stirring is continued for 30min to obtain a mixed solution of sulfuric acid, sodium molybdate and thiourea, the mixed solution is moved into a hydrothermal kettle, and the fiber membrane cut in the step (3) is moved to a hydrothermal kettleThe tablet is placed in the mixed solution of the hydrothermal kettle.
8. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that 24mL of deionized water and 2mL of hydrochloric acid solution are weighed in the step (4), added into a container, then 0.12g of sodium molybdate dihydrate and 0.20g of thiourea are added while stirring, stirring is continued for 30min to obtain a mixed solution of hydrochloric acid, sodium molybdate and thiourea, the mixed solution is moved into a hydrothermal kettle, and then the fiber membrane cut in the step (3) is placed into the mixed solution of the hydrothermal kettle.
9. The flexible TiO of claim 1 having visible light catalytic properties2/PVDF@MoS2The preparation method of the composite nanofiber is characterized in that in the step (5), the hydrothermal kettle is hermetically placed in an oven, heated to 150 ℃ and kept for 24 hours, and after natural cooling, the obtained material is repeatedly washed with absolute ethyl alcohol and deionized water for multiple times to obtain the flexible TiO with visible light catalytic performance2/PVDF@MoS2And (3) compounding the nano fibers.
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| CN109331882B (en) * | 2018-11-01 | 2021-06-01 | 南京工业大学 | Preparation method of flexible organic piezoelectric-photocatalytic composite spiral fiber |
| CN109772454B (en) * | 2019-02-28 | 2021-07-27 | 清华大学深圳研究生院 | Photocatalytic film, preparation method thereof and application of photocatalytic film in degradation of disinfection byproduct precursor |
| CN113101971B (en) * | 2021-03-15 | 2022-12-09 | 山东师范大学 | PVDF/MoS 2 AuNPS material and preparation method and application thereof |
| CN113842949B (en) * | 2021-09-29 | 2023-08-22 | 西安理工大学 | m-MoSe 2 /PVDF/h-WSe 2 Preparation method of double heterojunction flexible piezoelectric catalyst |
| CN114507942B (en) * | 2022-03-04 | 2022-11-25 | 东南大学 | Preparation method of polyvinylidene fluoride nanofiber membrane regulated and controlled by mixed phase-change titanium dioxide |
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