CN115569673A - Nanofiber membrane with organic dye photocatalytic degradation function and preparation method thereof - Google Patents
Nanofiber membrane with organic dye photocatalytic degradation function and preparation method thereof Download PDFInfo
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- CN115569673A CN115569673A CN202211279942.9A CN202211279942A CN115569673A CN 115569673 A CN115569673 A CN 115569673A CN 202211279942 A CN202211279942 A CN 202211279942A CN 115569673 A CN115569673 A CN 115569673A
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- 239000012528 membrane Substances 0.000 title claims abstract description 48
- 239000002121 nanofiber Substances 0.000 title claims abstract description 44
- 238000013033 photocatalytic degradation reaction Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000975 dye Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000001699 photocatalysis Effects 0.000 claims abstract description 21
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001263 FEMA 3042 Substances 0.000 claims abstract description 7
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims abstract description 7
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims abstract description 7
- 229940033123 tannic acid Drugs 0.000 claims abstract description 7
- 235000015523 tannic acid Nutrition 0.000 claims abstract description 7
- 229920002258 tannic acid Polymers 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000007598 dipping method Methods 0.000 claims abstract description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 18
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 12
- 238000010041 electrostatic spinning Methods 0.000 claims description 8
- 229940044631 ferric chloride hexahydrate Drugs 0.000 claims description 5
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims description 5
- 230000000593 degrading effect Effects 0.000 claims description 3
- 238000007146 photocatalysis Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004043 dyeing Methods 0.000 abstract description 8
- 238000007639 printing Methods 0.000 abstract description 8
- 239000002351 wastewater Substances 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 150000008442 polyphenolic compounds Chemical class 0.000 abstract description 5
- 235000013824 polyphenols Nutrition 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- WOSISLOTWLGNKT-UHFFFAOYSA-L iron(2+);dichloride;hexahydrate Chemical compound O.O.O.O.O.O.Cl[Fe]Cl WOSISLOTWLGNKT-UHFFFAOYSA-L 0.000 abstract description 2
- 238000001338 self-assembly Methods 0.000 abstract description 2
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- 239000000463 material Substances 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 5
- 229940043267 rhodamine b Drugs 0.000 description 5
- 239000011941 photocatalyst Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 230000001089 mineralizing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
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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
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
- B01J31/30—Halides
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
- B01J35/59—Membranes
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
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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
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0205—Impregnation in several steps
-
- 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
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0234—Impregnation and coating simultaneously
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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
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a nanofiber membrane with the function of photocatalytic degradation of organic dye and a preparation method thereof, and the preparation method of the nanofiber membrane with the function of photocatalytic degradation of organic dye comprises the following steps of a) immobilization: sequentially dipping the nanofiber membrane into a tannic acid solution and an iron chloride hexahydrate solution, and repeating for a plurality of times to obtain a blank membrane; b) And (3) post-treatment: drying the blank film prepared in the step a) to obtain a finished product. According to the invention, the metal polyphenol coating with the photocatalytic function is formed on the surface of the nanofiber membrane by a layer-by-layer self-assembly method, the overall preparation process is simple, the cost is low, the environment is protected, and the prepared nanofiber membrane has a high specific surface area, is beneficial to improving the photocatalytic performance, and is very suitable for photocatalytic degradation of organic dyes in printing and dyeing wastewater.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of photocatalytic printing and dyeing wastewater treatment, in particular to a nanofiber membrane with a function of photocatalytic degradation of organic dye and a preparation method thereof.
[ background of the invention ]
In the production process of the textile industry, printing and dyeing processing is an indispensable step as a key means for improving the added value of textiles. However, the printing and dyeing process inevitably produces printing and dyeing wastewater, such as rhodamine B dye which is carcinogenic and mutagenic, and the wastewater containing the rhodamine B dye has deep chroma, high organic pollutant content and poor biodegradability, thereby seriously harming the water body environment and the human health.
At present, the treatment method of the printing and dyeing wastewater mainly comprises a photocatalysis method, a physical method, a biological method and the like. The photocatalysis method can utilize light energy to drive materials to carry out catalytic reaction, thereby degrading, decoloring and mineralizing organic pollutants harmful to human bodies and environment into inorganic micromolecular substances. The photocatalytic method has been rapidly developed in recent years because of its advantages of relatively thorough degradation of organic pollutants and utilization of solar energy. At present, photocatalysts mainly comprise metal oxides, metal-organic frameworks and inorganic semiconductors, such as TiO 2 、WO 3 、SnO 2 And CdS, etc. However, the photocatalytic material generally has the defects of high price, complex preparation, difficult guarantee of high specific surface area, low sunlight utilization rate and the like, so that the application of the photocatalytic material in printing and dyeing wastewater is limited. In addition, if the photocatalytic material is directly put into water and dispersed for use, it is difficult to recover and the loss is large, such as a photocatalyst disclosed in (publication) No. CN106865685BA treatment method for degrading rhodamine B dye wastewater; if the photocatalytic material is used as a coating, a large amount of effective active surface of the photocatalytic material is lost, so that the using amount is increased, and the cost is increased, for example, a method for preparing a photocatalytic film for dye degradation with the publication (publication) number of CN108927225A is disclosed.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a nanofiber membrane with a photocatalytic organic dye degradation function and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the preparation method of the nanofiber membrane with the function of photocatalytic degradation of organic dye comprises the following steps:
a) Solid loading: sequentially dipping the nanofiber membrane in a tannic acid solution and a ferric chloride hexahydrate solution, and repeating for a plurality of times to obtain a blank membrane;
b) And (3) post-treatment: drying the blank film prepared in the step a) to obtain a finished product.
Preferably, in the step a), the nanofiber membrane is a polyacrylonitrile nanofiber membrane.
Furthermore, the polyacrylonitrile nanofiber membrane is prepared from an N, N-dimethylformamide solution of polyacrylonitrile by an electrostatic spinning technology, wherein the concentration of the N, N-dimethylformamide solution of the polyacrylonitrile is 5-15%.
Preferably, in the step a), the concentration of the tannic acid solution is 0.1 to 5mg/mL.
Preferably, in the step a), the concentration of the ferric chloride hexahydrate solution is 0.1-5 mg/mL.
Preferably, in the step a), the time for each immersion is 1 to 20min.
Preferably, the cycle is repeated 1 to 20 times in the step a).
The nanofiber membrane with the function of photocatalytic degradation of organic dye is prepared by the preparation method.
The invention has the beneficial effects that:
1) The metal polyphenol coating with the photocatalytic function is prepared on the surface of the nanofiber membrane by adopting a layer-by-layer self-assembly method, and the metal polyphenol coating is fixedly loaded on the nanofiber membrane, so that the problem of difficulty in recovering a photocatalyst is well solved, organic pollutants enriched in water can be intercepted in time by utilizing the membrane effect and degraded in situ under the photocatalytic effect, and the nanofiber membrane has a large specific surface, so that the photocatalytic efficiency can be effectively improved, and the contact area of the organic pollutants and the photocatalyst can be increased;
2) The metal polyphenol coating is firmly combined on the surface of the nanofiber membrane by utilizing hydrogen bonds, pi-pi stacking and hydrophobic interaction, so that the metal polyphenol coating is not easy to fall off;
3) The integral preparation process is simple, low in cost, green and environment-friendly, is convenient for large-scale production, and is very suitable for photocatalytic degradation of organic dyes in printing and dyeing wastewater.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is an electron microscope image of a finished nanofiber membrane with photocatalytic degradation organic dye function prepared in the first embodiment after being magnified 1000;
FIG. 2 is an electron microscope image of the finished nanofiber membrane with the function of photocatalytic degradation of organic dye prepared in the first embodiment after being enlarged by 10000;
FIG. 3 is a graph showing the change of the photocatalytic efficiency of the nanofiber membrane finished product with the function of photocatalytic degradation of organic dye according to the embodiment I and the embodiment II along with the photocatalytic time;
fig. 4 is an absorption spectrum of the nanofiber membrane finished product with the function of photocatalytic degradation of organic dyes prepared in the first and second examples.
[ detailed description ] A
The first embodiment is as follows:
firstly, dissolving polyacrylonitrile with the concentration of 10% in N, N-dimethylformamide, stirring for 4 hours at 60 ℃ by using a magnetic stirrer, and carrying out ultrasonic treatment to form a uniform spinning precursor solution. And then, moving the spinning precursor solution into an injector of an electrostatic spinning machine, simultaneously adopting a flat plate coated with aluminum foil and tinfoil as a receiving device, and starting electrostatic spinning (when the spinning precursor solution is sprayed out and the solvent is evaporated, the polyacrylonitrile nanofiber membrane can be obtained). In the electrostatic spinning process, the needle model is 22G; the electrostatic voltage is 10KV; the flow rate of the spinning solution is 0.5mL h -1 (ii) a The distance between the tip of the needle and the receiving means is 10cm. Then, the nanofiber membrane was immersed in a tannic acid solution of 3mg/mL for 10min, and then immersed in an iron chloride hexahydrate solution of 0.75mg/mL for 10min, and the cycle was repeated 1 time to obtain a green membrane. And finally, drying the blank film to obtain a nanofiber film finished product with the function of photocatalytic degradation of organic dye. In addition, the electron microscope images of 1000 times and 10000 times of amplification of the nanofiber membrane finished product with the function of photocatalytic degradation of organic dye can be seen in fig. 1 and fig. 2 respectively.
Example two:
firstly, dissolving polyacrylonitrile with the concentration of 10% in N, N-dimethylformamide, stirring for 4 hours at the temperature of 60 ℃ by using a magnetic stirrer, and carrying out ultrasonic treatment to form uniform spinning precursor solution. And then, moving the spinning precursor solution into an injector of an electrostatic spinning machine, simultaneously adopting a flat plate coated with aluminum foil and tinfoil as a receiving device, and starting electrostatic spinning (when the spinning precursor solution is sprayed out and the solvent is evaporated, the polyacrylonitrile nanofiber membrane can be obtained). In the electrostatic spinning process, the needle head is 22G in model; electrostatic voltage 10KV; the flow rate of the spinning solution is 0.5mL h -1 (ii) a The distance between the tip of the needle and the receiving means is 10cm. Then, the nanofiber membrane is firstly soaked in 3mg/mL tannic acid solution for 10min, then is soaked in 0.75mol/mL ferric chloride hexahydrate solution for 10min, and the cycle is repeated for 5 times to obtain a blank membrane. And finally, drying the blank film to obtain a nanofiber film finished product with the function of photocatalytic degradation of organic dye.
Example three:
and (3) carrying out a photocatalytic performance test on the nanofiber membrane finished product with the function of photocatalytic degradation of the organic dye prepared in the first and second embodiments. Wherein, the organic wastewater adopted in the test is 20mL of 10mg/L rhodamine B solution; the reaction condition is 300W xenon lamp; controlling the reaction temperature to be 25 ℃; the reaction time is 8h; the distance between the lamp tube and the rhodamine B solution is 12cm.
Referring to fig. 3 and 4, experimental results prove that the photocatalytic efficiency of the nanofiber membrane finished product with the function of photocatalytic degradation of organic dyes prepared in the first and second embodiments can reach 93%.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The preparation method of the nanofiber membrane with the function of photocatalytic degradation of organic dye is characterized by comprising the following steps:
a) Solid loading: sequentially dipping the nanofiber membrane in a tannic acid solution and a ferric chloride hexahydrate solution, and repeating for a plurality of times to obtain a blank membrane;
b) And (3) post-treatment: drying the blank film prepared in the step a) to obtain a finished product.
2. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes according to claim 1, wherein the method comprises the following steps: in the step a), the nanofiber membrane is a polyacrylonitrile nanofiber membrane.
3. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes according to claim 2, wherein the method comprises the following steps: the polyacrylonitrile nanofiber membrane is prepared from an N, N-dimethylformamide solution of polyacrylonitrile through an electrostatic spinning technology, wherein the concentration of the N, N-dimethylformamide solution of the polyacrylonitrile is 5-15%.
4. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes as claimed in claim 1, wherein the method comprises the following steps: in the step a), the concentration of the tannic acid solution is 0.1-5 mg/mL.
5. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes as claimed in claim 1, wherein the method comprises the following steps: in the step a), the concentration of the ferric chloride hexahydrate solution is 0.1-5 mg/mL.
6. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes according to claim 1, wherein the method comprises the following steps: in the step a), the time for each dipping is 1-20 min.
7. The method for preparing the nanofiber membrane having the function of photocatalytic degradation of organic dyes according to claim 1, wherein the method comprises the following steps: in the step a), the circulation is repeated for 1 to 20 times.
8. A nanofiber membrane with a function of degrading organic dyes through photocatalysis, which is prepared by the preparation method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279942.9A CN115569673A (en) | 2022-10-19 | 2022-10-19 | Nanofiber membrane with organic dye photocatalytic degradation function and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279942.9A CN115569673A (en) | 2022-10-19 | 2022-10-19 | Nanofiber membrane with organic dye photocatalytic degradation function and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115569673A true CN115569673A (en) | 2023-01-06 |
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