CN105195234B - The preparation method of fiber photocatalyst - Google Patents
The preparation method of fiber photocatalyst Download PDFInfo
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- CN105195234B CN105195234B CN201510676076.0A CN201510676076A CN105195234B CN 105195234 B CN105195234 B CN 105195234B CN 201510676076 A CN201510676076 A CN 201510676076A CN 105195234 B CN105195234 B CN 105195234B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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 kind of preparation method of fiber photocatalyst, comprise the following steps：1) organic solvent is well mixed with absolute ethyl alcohol to obtain mixed solvent, wherein organic solvent accounts for the 75~85% of the cumulative volume of the mixed solvent；2) in the mixed solvent that nano titanium oxide addition step 1) obtains is uniformly dispersed, obtains nano titanium oxide dispersion；3) polyacrylonitrile fibre is drawn through nano titanium oxide dispersion, is drying to obtain fiber photocatalyst into coagulating bath solidified forming, washing therewith.The preparation method, technique is simple, and suitable for industrialization, product, which is made, in it has the photocatalytic of lasting stability, is easily recycled after use.
Description
Technical field
The present invention relates to photocatalysis technology field, more particularly to a kind of preparation method of fiber photocatalyst.
Background technology
With the development of society and the quickening of process of industrialization, water pollution is on the rise, wherein, wastewater in textile printing and dyeing industry
Processing have the characteristics that discharge capacity is big, biological degradability is poor and potential carcinogenicity, it has also become the environmental protection of global common concern
Problem.Irradiated TiO is found from Fujishima in 1972 and Honda2Since redox reaction occurs for surface energy, light is urged
Change technology is widely paid attention to as a kind of new water treatment technology, the research and application of its photocatalytic process.Nanometer two
Titanium oxide is and harmless to animals and plants and favored by scientific research personnel because its catalytic activity is high, stability is good, non-secondary pollution.
In the application process of actual water process, photocatalytic process is carried out using suspension system mostly.Granular nano titanium oxide point
Dissipate in water, big with pollutant contact area, mass transfer effect is good, high catalytic efficiency.However, due to nano titanium oxide particle diameter
It is small, proportion is low, causes it to separate difficulty in a fluid, is not easily recycled after use, can produce different degrees of loss, be not easy to advise greatly
Mould uses.Nano titanium oxide is carried on certain carrier, the shortcomings that suspension phase nano-titanium dioxide can be overcome, solves to receive
The problem of rice titanium dioxide uses rear difficult separation and recycling.Therefore, the immobilization technology of nano titanium oxide is always photocatalysis
One of study hotspot of technical field.
The fixing means of nano-photocatalyst mainly has：Sol-gel process, chemical vapour deposition technique, physical vapour deposition (PVD)
Method, liquid phase deposition, electrophoretic deposition, Molecular Adsorption precipitation method etc., are fixed in film, fiber, metal, glass, ceramics
Deng on matrix, obtain it is easily separated, can reuse photochemical catalyst.Wherein, fiber is because specific surface area is big, is easy to further pass through spinning
Knit or non-organization method is processed into the product of variform and becomes the negative of great application prospect the advantages that its application field to widen
Carry matrix.Qi etc. is by soaking-rolling-baking-traditional handicraft such as roasts by nano titanium oxide coated on cotton fiber, has investigated it to red
The photocatalytic degradation effect of wine spot and coffee stain, as a result finds, after sunlight irradiation 8h, color spot disappears substantially, but coating is steady
Qualitative Shortcomings, this technology are disclosed materials chemistry magazine, the 47th the 4567-4574 pages of phase of volume 16 in 2006, text
Chapter topic：Self-cleaning cotton (that is, Self-cleaning Cotton [J] .Journal of Materials Chemistry, 2006,
16(47):4567-4574.) Gilmour etc. is prepared for diallyl dimethyl amine hydrochlorate (PDDA) bag with sol-gal process
The photochemical catalyst of nano titanium oxide capsule structure is covered, is then fixed on the glass fibers by dip-coating, through calcining
Afterwards, the good nano titanium dioxide hybrid glass fabric of photocatalysis performance is obtained, within 30min time, to methylene blue
Degradation rate more than 90%, wherein the dosage of nano titanium oxide is 1g/20mL；The concentration of methylene blue is 10ppm, however,
This product pliability is poor, and application field is subject to certain restrictions.The technology is disclosed《Industry is studied with engineering chemistry》
The 50th the 17800-17811 pages of phase of volume 52 in 2013, title of article：The titanium dioxide as made from polymer protection titanium dioxide
The photocatalysis performance of film, i.e. Photocatalytic Performance of Titanium Dioxide Thin Films
from Polymer-Encapsulated Titania[J].Industrial&Engineering Chemistry
Research,2013,52(50):17800-17811..Lin etc. is prepared for having by sol-gal process and with reference to online reducing process
There is nano titanium oxide/silver/silver bromide modified glass-fiber, i.e. Ag-AgBr-TiO of plasmon characteristic2/ GF, it is can
To see under light and Photocatalytic Degradation of Methyl Orange is worked well, and there is good stability, weak point is preparation process complexity, and
It is with high costs, it is difficult to industrialized production.The technology is disclosed《Applied catalysis B：Environment》The 166-167 volumes the 0th phase in 2015,
The 287-294 pages, title of article：The light-catalysed preparation of fiber base surface plasma and its performance study under visible light；
That is Preparation of fiber-based plasmonic photocatalyst and its photocatalytic
performance under the visible light Applied Catalysis B:Environmental,2015,
166–167(0):287-294..Bedford etc. by nano titanium oxide and cellulose acetate be dissolved in formic acid, acetone, water mix it is molten
In agent, use coaxial method of electrostatic spinning to be prepared for using cellulose acetate as core, nano titanium oxide for sheath cellulose (core)-
TiO2(sheath) nanofiber, obtains the nanofiber textile with self-cleaning performance, and the technology is disclosed《ACS
Application material and interface》, the 8th the 2448-2455 pages of the phase of volume 2 in 2010, title of article：Coaxial electrostatic spinning prepares photocatalysis certainly
Clean fiber, i.e. Photocatalytic Self Cleaning Textile Fibers by Coaxial
Electrospinning, ACS Applied Materials＆Interfaces, 2010,2 (8):2448-2455.Meng etc. will
After preparing nanometer titanium dioxide fiber by electrostatic spinning-roasting, itself and dimethyl silicone polymer matrix, sheet glass are mutually tied
Close, obtain the microfluid photocatalytic fiber reactor for having good Photocatalytic Degradation Property to methylene blue, the technology is disclosed
In《Nanoscale》O. 11th of volume 5 in 2013, the 4687-4690 pages, title of article：Utilize nano-silica made from Static Spinning
Change efficient microfluid base optic catalytic reactor of the titanium fiber as photochemical catalyst；That is, A high efficiency
microfluidic-based photocatalytic microreactor using electrospun nanofibrous
TiO2As a photocatalyst, Nanoscale, 2013,5 (11):4687-4690.In view of the complex process of electrostatic spinning
Degree, cost and yield, industrialization promotion have difficulties.
To sum up, although nano-photocatalyst can be fixed on the carrier of fiber-like by these carrying methods, reaching preparation can
Reclaim the purpose of photochemical catalyst, and with the characteristic for conveniently separating and reclaiming after catalysis, but there is cost it is high, prepared
The deficiencies of journey complexity, and matrix aging easily in photocatalytic process, nano-photocatalyst and matrix set fastness are poor, still without
Method meets convenient, cheap, efficient treatment of dyeing wastewater demand, is all difficult to meet actual answer either in yield or scale
Demand.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of preparation method of fiber photocatalyst, and technique is simple, fits
In industrialization, product, which is made, in it has the photocatalytic of lasting stability, is easily recycled after use.
Therefore, technical scheme is as follows：
A kind of preparation method of fiber photocatalyst, comprises the following steps：
1) mixed solvent is prepared：Organic solvent is well mixed with absolute ethyl alcohol to obtain mixed solvent, wherein organic solvent
Account for the 75~85% of the cumulative volume of the mixed solvent；The organic solvent is DMF, N, N- dimethyl second
Acid amides or dimethyl sulfoxide (DMSO)；
2) nano titanium oxide dispersion is prepared：The in the mixed solvent that nano titanium oxide addition step 1) obtains is disperseed
Uniformly, nano titanium oxide dispersion is obtained；
The nano titanium oxide is de- titanium ore crystal type nano TiO 2 or mixed crystal type nanometer titanium dioxide；It is described mixed
Crystal type nano TiO 2 is the mixture of de- titanium ore and rutile-phase nano-titanium dioxide；
3) immersion coating：Polyacrylonitrile fibre is drawn through the nano titanium oxide dispersion that step 2) obtains, therewith
Into coagulating bath solidified forming, washing is drying to obtain the fiber photocatalyst.
Further, the coagulating bath is water or solvent aqueous solution, and the solvent is selected from DMF, N, N- bis-
Any one in methylacetamide and dimethyl sulfoxide (DMSO).It is preferred that the concentration of solvent is less than or equal in the solvent aqueous solution
10wt.%.
Further, solid content is 0.01~0.1g/L in the nano titanium oxide dispersion that step 2) obtains.
Further, the speed that the polyacrylonitrile fibre passes through nano titanium oxide dispersion is 0.5~1.5m/s.
Further, the condition that step 3) is dried is 30~60 DEG C of vacuum drying.
Further, the nano titanium oxide is nano titanium oxide P25.
The preparation method of fiber photocatalyst provided by the invention disperses-dip-coating method preparation fiber optic using solution altogether
Catalyst, product is made and is combined into by commercialized nano titanium dioxide photocatalyst with polyacrylonitrile fibre, it is by nanometer
Titanium dioxide is scattered in the mixed solvent, meanwhile, the mixed solvent is also the solvent of polyacrylonitrile matrix, is so coating-is coagulating
Solid process in, nano titanium oxide can be anchored on to the surface of polyacrylonitrile fibre, obtain the fiber optic with stability property
Catalyst, it can be repeated several times for photocatalytic process；The fibre of various forms and purposes can be also processed into as needed, opened up
Wide application field, preparation technology is simple, and cost is cheap, has great application prospect.
Embodiment
Technical scheme is described with reference to embodiments.P25 is nano titanium oxide in each embodiment
P25, purchased from Degussa.
Embodiment 1
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 85/15 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.03g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.5m/s speed
After dispersion liquid, the solidified forming into water, drying is washed；Drying condition is 30 DEG C of vacuum drying 12h, obtains the fiber photocatalysis
Agent.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Concentration is the 6ppm aqueous solution, fiber consumption 1g/L) photocatalytic degradation efficiency up to 65.6%, after recycling three times, its
It is 57.7% to rhdamine B (concentration be the 6ppm aqueous solution, fiber consumption 1g/L).
Embodiment 2
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 85/15 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.05g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is disperseed with 1m/s speed by nano titanium oxide made from step 2)
After liquid, therewith into solidified forming in water, drying is washed；Drying condition is 40 DEG C of vacuum drying, obtains the fiber photocatalysis
Agent.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Rhdamine B concentration is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 82.5%,
After recycling three times, it is to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Photocatalytic degradation efficiency up to 81.4%.
Embodiment 3
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 80/20 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.01g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.5m/s speed
After dispersion liquid, the solidified forming into water, drying is washed；Drying condition is 45 DEG C of vacuum drying, obtains the fiber photocatalyst.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 61.3%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency is 42.2%.
Embodiment 4
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 75/25 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.03g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.2m/s speed
After dispersion liquid, the solidified forming into water, drying is washed；Drying condition is 60 DEG C of vacuum drying, obtains the fiber photocatalyst.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 57.2%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency 32.5%.
Embodiment 5
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 80/20 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.05g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.2m/s speed
After dispersion liquid, it is solidified forming in 8wt.% dimethyl sulphoxide aqueous solutions into concentration, washs drying；Drying condition is 55 DEG C of vacuum
Dry, obtain the fiber photocatalyst.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 56.9%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency 52.9%.
Embodiment 6
1) mixed solvent is prepared：DMA/absolute ethyl alcohol is prepared according to volume ratio for 80/20 (v/v)
Mixed solvent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.03g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is disperseed with 1m/s speed by nano titanium oxide made from step 2)
After liquid, it is solidified forming in 5wt.% dimethylacetamide amine aqueous solutions into concentration, washs drying；Drying condition is 45 DEG C of vacuum
Dry, obtain the fiber photocatalyst.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 55.1%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency 51.3%.
Embodiment 7
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 85/15 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.01g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.2m/s speed
After dispersion liquid, therewith into solidified forming in water, drying is washed；Drying condition is 35 DEG C of vacuum drying, obtains the fiber optic and urges
Agent.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 34.6%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency 33.5%.
Embodiment 8
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 85/15 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.05g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.5m/s speed
After dispersion liquid, the fiber photocatalyst of primary coating is dried to obtain into solidified forming in water, washing therewith；
4) secondary coating：The fiber photocatalyst of obtained primary coating is made with 0.5m/s speed by step 2)
Nano titanium oxide dispersion, subsequently into curing molding in water, washing is dried to obtain secondary coating polyacrylonitrile fibre and born
Carry the fiber photocatalyst of nano titanium oxide.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 83.2%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency is up to 82.8%；To methylene blue dye (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 95.1%, through following three times
After ring use, the photocatalysis drop of methylene blue dye (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Efficiency is solved up to 94.8%.
Embodiment 9
1) mixed solvent is prepared：Dimethyl sulfoxide (DMSO)/absolute ethyl alcohol is molten for 85/15 (v/v) preparation mixing according to volume ratio
Agent；
2) nano titanium oxide dispersion is prepared：P25 is added to the in the mixed solvent of step 1) preparation, through ultrasonic disperse
Afterwards, it is 0.03g/L nano titanium oxide dispersions to obtain solid content；
3) immersion coating：Polyacrylonitrile fibre is passed through into nano titanium oxide made from step 2) point with 0.5m/s speed
After dispersion liquid, the fiber photocatalyst of primary coating is dried to obtain into solidified forming in water, washing therewith；
4) secondary coating：The fiber photocatalyst of obtained primary coating is made with 0.5m/s speed by step 2)
Nano titanium oxide dispersion, subsequently into curing molding in water, washing is dried to obtain secondary coating polyacrylonitrile fibre and born
Carry the fiber photocatalyst of nano titanium oxide.
The fiber photocatalyst of polyacrylonitrile fibre load nano-titanium dioxide made from the present embodiment, in ultraviolet light irradiation
In 1h light-catalyzed reaction, to rhdamine B (wherein, a length of 365nm of ultraviolet light wave, fluence density 7.6mW/cm2,
Dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L) photocatalytic degradation efficiency up to 72.5%, through following three times
After ring use, its photocatalysis to rhdamine B (dye strength is the 6ppm aqueous solution, and fiber photocatalyst dosage is 1g/L)
Degradation efficiency 64.4%.
Claims (8)
1. a kind of preparation method of fiber photocatalyst, it is characterised in that comprise the following steps：
1) mixed solvent is prepared：Organic solvent is well mixed with absolute ethyl alcohol to obtain mixed solvent, wherein organic solvent accounts for institute
State the 75~85% of the cumulative volume of mixed solvent；The organic solvent is DMF, DMA
Or dimethyl sulfoxide (DMSO)；
2) nano titanium oxide dispersion is prepared：The in the mixed solvent that nano titanium oxide addition step 1) is obtained is scattered equal
It is even, obtain nano titanium oxide dispersion；
The nano titanium oxide is anatase crystal nano titanium oxide or mixed crystal type nanometer titanium dioxide；The mixed crystal
Type nano titanium oxide is the mixture of anatase and rutile-phase nano-titanium dioxide；
3) immersion coating：Polyacrylonitrile fibre is drawn through the nano titanium oxide dispersion that step 2) obtains, entered therewith
Coagulating bath solidified forming, washing are drying to obtain the fiber photocatalyst.
2. the preparation method of fiber photocatalyst as claimed in claim 1, it is characterised in that：Drying will be washed by also including step 4)
The fiber photocatalyst obtained afterwards is drawn through the nano titanium oxide dispersion that step 2) obtains again, then consolidates through coagulating bath
Change, washing is dried to obtain the fiber photocatalyst after secondary coating.
3. the preparation method of fiber photocatalyst as claimed in claim 1 or 2, it is characterised in that：The coagulating bath is water or molten
The agent aqueous solution, the solvent are any one in DMF, DMA and dimethyl sulfoxide (DMSO)
Kind.
4. the preparation method of fiber photocatalyst as claimed in claim 3, it is characterised in that：Solvent in the solvent aqueous solution
Concentration is less than or equal to 10wt.%.
5. the preparation method of fiber photocatalyst as claimed in claim 1 or 2, it is characterised in that：The nanometer two that step 2) obtains
Solid content is 0.01~0.1g/L in titanium oxide dispersion liquid.
6. the preparation method of fiber photocatalyst as claimed in claim 1 or 2, it is characterised in that：The polyacrylonitrile fibre leads to
The speed for crossing nano titanium oxide dispersion is 0.5~1.5m/s.
7. the preparation method of fiber photocatalyst as claimed in claim 1 or 2, it is characterised in that：Step 3) dry condition be
30~60 DEG C of vacuum drying.
8. the preparation method of fiber photocatalyst as claimed in claim 1 or 2, it is characterised in that：The nano titanium oxide is
Nano titanium oxide P25.
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| CN107583654A (en) * | 2017-11-03 | 2018-01-16 | 天津工业大学 | The preparation method of nanoporous microballoon with adsorption photochemical catalysis synergy |
| CN108976549A (en) * | 2018-06-25 | 2018-12-11 | 广东格瑞新材料股份有限公司 | A kind of degradable PE composition and preparation method thereof |
| CN109183421A (en) * | 2018-09-20 | 2019-01-11 | 吕莉 | A kind of preparation method of automatically cleaning plastic carpet |
| CN112275325B (en) * | 2020-09-28 | 2022-06-21 | 长春工业大学 | Preparation of cadmium sulfide/titanium dioxide/polyacrylonitrile composite nano material for photocatalysis |
| CN113151923A (en) * | 2021-03-11 | 2021-07-23 | 山东大学 | Polyurethane/titanium dioxide composite fiber, photocatalytic woven device, preparation method and application |
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