CN103074704B - Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers - Google Patents

Electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers Download PDF

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CN103074704B
CN103074704B CN201310022405.0A CN201310022405A CN103074704B CN 103074704 B CN103074704 B CN 103074704B CN 201310022405 A CN201310022405 A CN 201310022405A CN 103074704 B CN103074704 B CN 103074704B
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bivo
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electrostatic spinning
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deionized water
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CN103074704A (en
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谈国强
杨薇
黄靖
罗洋洋
任慧君
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Shaanxi University of Science and Technology
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Abstract

The invention provides an electrospinning preparation method of BiVO4 (bismuth vanadium oxide) fibers. The electrospinning preparation method of the BiVO4 fibers comprises the following steps: firstly, dissolving Bi (NO3)3.5H2O and citric acid monohydrate into deionized water, stirring uniformly, adding ethanolamine, and stirring till a clear state to obtain a solution A; secondly, dissolving ammonium metavanadate and the citric acid monohydrate into deionized water to obtain orange mixed liquid, and stirring the mixed liquid at a constant temperature of 70DEG C till the color of the mixed liquid turns from orange to dark blue and no sediment is generated so as to obtain a solution B; thirdly, mixing the solution A and the solution B to obtain a BiVO4 precursor solution; fourthly, uniformly mixing the BiVO4 precursor solution and an ethanol solution of polyvinylpyrrolidone to obtain an electrospinning solution; fifthly, filling the electrospinning solution into an injector with an injection needle of 0.5 microns, and spinning to obtain composite fibers on a receiving device; and finally, drying the composite fibers at room temperature, and heating to remove residual polyvinylpyrrolidone so as to obtain the BiVO4 fibers. The electrospinning preparation method is simple in process, convenient to operate and environment-friendly; and the prepared BiVO4 fibers have relatively good photocatalysis in ultraviolet light.

Description

A kind of method of electrostatic spinning prepares BiVO 4the method of fiber
Technical field
The invention belongs to field of functional materials, be specifically related to a kind of method of electrostatic spinning and prepare BiVO 4the method of fiber.
Background technology
Since 20th century, environmental pollution is day by day serious, and energy crisis highlights day by day, becomes the serious problems threatening human survival and development.In various environmental pollution, the most generally, main and what have the greatest impact is chemical contamination.Thus; effectively controlling and administering various chemical pollutant to the destruction forming the most basic water resource, soil and the atmospheric environment of human survival is emphasis in comprehensive environmental improvement, and exploitation can be the key of environmental protection practical technique innoxious for various chemical pollutant.The representative chemical contamination processing method of current use mainly contains: physisorphtion, chemical oxidization method, microorganism treatment and high temperature incineration method, and the protection and harnessing of these methods to environment plays significant role.But it is low that these technology also exist efficiency to some extent, can not be thoroughly innoxious by pollutant, easily produce secondary pollution, the scope of application is narrow, be only applicable to specific pollutant, energy consumption is high, be not suitable for the defect of the aspects such as large-scale promotion.Thus, a kind of efficient, low energy consumption, applied widely and have the chemical pollutant clearance technique of deep oxidation ability to be always the target that green technology is pursued is developed.
Photocatalitic Technique of Semiconductor cuts down technology as a kind of novel environmental contaminants, utilize the semiconductor oxide materials hard to bear activation of surface energy under light illumination, the characteristics such as the efficient oxidation decomposing organic matter, reducing heavy metal ion, antibacterial and remove peculiar smell, have broad application prospects, with traditional TiO in sewage disposal, purification of air, Solar use, antibacterial and self-cleaning function etc. 2photochemical catalyst is compared, BiVO 4it is a kind of perovskite composite oxide, there is suitable band structure, 6s and the O atom 2p hybridized orbit of Bi atom forms valence band, and V atom 5d track forms conduction band, and its band gap is about about 2.7eV, can be excited by Uv and visible light, produce photo-generate electron-hole, have better structure tolerance, effectively can must carry out the exchange of part ion, there is higher efficiency its aspect such as photocatalysis to degrade organic matter, photocatalytic water, has a good application prospect in novel photocatalyst field.Traditional preparation method has microemulsion method, chemical bath desposition method, sol-gal process etc., but comparatively large by the powder granule size that these methods are obtained, and preparation process is complicated, and reaction time is long.
Summary of the invention
The invention provides that a kind of technique is simple, easy to operate, manufacturing cycle is short, eco-friendly method of electrostatic spinning prepares BiVO 4the method of fiber, BiVO prepared by the method 4fiber has good photocatalytic under ultraviolet light.
In order to achieve the above object, the technical solution used in the present invention comprises the following steps:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by Bi (NO 3) 35H 2o and Citric Acid Mono are dissolved in deionized water, and stir, and then add monoethanolamine and continue to stir to clarify, obtaining solution A; Wherein, the Bi (NO in deionized water is dissolved in 3) 35H 2the mol ratio of O and Citric Acid Mono is 1.200:1.799; Bi (the NO of every 0.01200mol 3) 35H 2o adds the monoethanolamine of 4.5ml;
1.2) ammonium metavanadate and Citric Acid Mono are dissolved in deionized water, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution; Wherein, the mol ratio being dissolved in ammonium metavanadate in deionized water and Citric Acid Mono is 1.200:1.799;
1.3) according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution are mixed, stir 30min, obtain BiVO 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
By BiVO 4precursor aqueous solution mixes with polyvinylpyrrolidone ethanolic solution, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Electrostatic spinning liquid is loaded in the syringe with 0.5 μm of syringe needle, the voltage of 16kV is added between syringe needle and the receiving system of ground connection, start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Then composite fibre is at room temperature dry, then be incubated at being heated to 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
Described step 1.1) in the Bi (NO of every 0.01200mol 3) 35H 2o adds the deionized water of 10mL, step 1.2) in the ammonium metavanadate of every 0.01200mol add the deionized water of 10mL; Step 1.3) BiVO 4biVO in precursor aqueous solution 4molar concentration be 0.60mol/L.
Described step 2) in the mass concentration of polyvinylpyrrolidone in polyvinylpyrrolidone ethanolic solution be 15%-55%.
Described step 2) middle BiVO 4the volume ratio of precursor aqueous solution and polyvinylpyrrolidone ethanolic solution is (1:15)-(5:15).
Described step 2) middle BiVO 4the volume ratio of precursor aqueous solution and polyvinylpyrrolidone ethanolic solution is 3:15.
The receiving system surface coverage of described step 3) has aluminium foil, and composite fibre covers on aluminium foil.
The syringe needle of described step 3) and the spacing of aluminium foil are 6cm.
Composite fibre in described step 3) adopts Muffle furnace heating, and the programming rate of Muffle furnace is 1-3 DEG C/min.
The temperature retention time of described step 3) is 1-3h.
Compared with prior art, beneficial effect of the present invention is: the present invention adopts method of electrostatic spinning to prepare BiVO 4fiber, and the BiVO prepared 4fiber has good photocatalysis performance under ultraviolet light, and preparation technology is simple, easy to operate, manufacturing cycle is short, environmental friendliness.
Accompanying drawing explanation
Fig. 1 is the light microscope figure of the composite fibre prepared by the embodiment of the present invention 2;
Fig. 2 is the light microscope figure of the composite fibre prepared by the embodiment of the present invention 3;
Fig. 3 is the SEM figure of the composite fibre prepared by the embodiment of the present invention 3;
Fig. 4 is the BiVO prepared by the embodiment of the present invention 3 4the SEM figure of fiber;
Fig. 5 is the BiVO prepared by the present invention 4the XRD figure of fiber; Wherein, the BiVO of a prepared by embodiment 3 4the XRD figure of fiber, the BiVO of b prepared by embodiment 4 4the XRD figure of fiber;
Fig. 6 is under ultraviolet light to the catalysis degradation modulus-time plot of rhodamine B; Wherein, a is not for add BiVO 4rhodamine B catalysis degradation modulus-the time plot under ultraviolet light of fiber, b is added with the obtained BiVO of embodiment 3 4rhodamine B catalysis degradation modulus-the time plot under ultraviolet light of fiber.
Detailed description of the invention
Embodiment 1:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.012mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the volume ratio of 3:15 by BiVO 4precursor aqueous solution and mass concentration be 15% polyvinylpyrrolidone ethanolic solution mix, obtain electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, add the voltage of 16kV between syringe needle and the receiving system of ground connection, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 3h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
Embodiment 2:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.01200mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the mass ratio of 3:15 by BiVO 4precursor aqueous solution and mass concentration be 25% polyvinylpyrrolidone ethanolic solution mix, obtain electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, have in the surface coverage of syringe needle and ground connection the voltage adding 16kV between the receiving system of aluminium foil, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 2h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
As seen from Figure 1, containing a small amount of fiber in the composite fibre that embodiment 2 is obtained, a large amount of drop.
Embodiment 3:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.01200mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the mass ratio of 3:15 by BiVO 4precursor aqueous solution mixes with the polyvinylpyrrolidone ethanolic solution of mass concentration 35%, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, have in the surface coverage of syringe needle and ground connection the voltage adding 16kV between the receiving system of aluminium foil, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 1h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
As can be seen from Fig. 2-3, not having drop in the composite fibre that embodiment 3 is obtained, be all fiber, and on fiber, microballon is few.As seen from Figure 4: the BiVO that embodiment 3 is obtained 4fiber is the yellow beading of sub-micron.
As can be seen from Figure 6, the BiVO that embodiment 3 is obtained is added with 4the rhodamine B degradation effect under ultraviolet light of fiber is obvious, and after UV-irradiation 150min, rhodamine B degradation rate can reach 90%, and BiVO is described 4fiber has good catalytic degradation activity to rhodamine B under ultraviolet light.
Embodiment 4:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.01200mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the mass ratio of 3:15 by BiVO 4precursor aqueous solution mixes with the polyvinylpyrrolidone ethanolic solution of mass concentration 35%, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, have in the surface coverage of syringe needle and ground connection the voltage adding 16kV between the receiving system of aluminium foil, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 3h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
As can be seen from Figure 5, embodiment 3 and the obtained BiVO of embodiment 4 4all diffraction maximums of fiber and PDF card (JCPDS NO.75-2480) fit like a glove, and the BiVO that embodiment 3 and embodiment 4 obtain is described 4fiber is monoclinic phase BiVO 4; And embodiment 3 and the obtained BiVO of embodiment 4 4the intensity at fiber diffraction peak is very high, and the BiVO that embodiment 3 and embodiment 4 obtain is described 4the crystal structure of fiber is good.
Embodiment 5:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.01200mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the mass ratio of 1:15 by BiVO 4precursor aqueous solution mixes with the polyvinylpyrrolidone ethanolic solution of mass concentration 55%, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, have in the surface coverage of syringe needle and ground connection the voltage adding 16kV between the receiving system of aluminium foil, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 3h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
Embodiment 6:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by the five water bismuth nitrate (Bi (NO of 0.01200mol 3) 35H 2and the Citric Acid Mono (C of 0.01799mol O) 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, be placed on magnetic stirring apparatus and stir, then add the monoethanolamine (C of 4.5ml 2h 7nO) and continue to stir to clarify, solution A is obtained;
1.2) by the ammonium metavanadate (NH of 0.01200mol 4vO 3) and the Citric Acid Mono (C of 0.01799mol 6h 8o 7h 2o) be dissolved in the deionized water of 10mL, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred 30min, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution;
1.3) be cooled to after room temperature until B solution, according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution mixed, stir 30min, obtain BiVO 4concentration is the BiVO of 0.60mol/L 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
According to the mass ratio of 5:15 by BiVO 4precursor aqueous solution mixes with the polyvinylpyrrolidone ethanolic solution of mass concentration 45%, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Loaded in the syringe with 0.5 μm of syringe needle by electrostatic spinning liquid, have in the surface coverage of syringe needle and ground connection the voltage adding 16kV between the receiving system of aluminium foil, the spacing controlling syringe needle and aluminium foil is 6cm; Then start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, and form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Again that composite fibre is at room temperature dry, be then be heated to 450 DEG C in the Muffle furnace of 1-3 DEG C/min at programming rate, and be incubated 3h at 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber.
Method of electrostatic spinning (electrospinning, also known as electrospinning, is called for short electrospinning) can be prepared continuous print, have the micro nanometer fiber of macro length.The core of this technology is that charged Polymer Solution or melt are flowed and refinement in electrostatic field, then solidifies through solvent evaporation or melt cooling, obtains fibrous material.

Claims (7)

1. a method of electrostatic spinning prepares BiVO 4the method of fiber, is characterized in that, comprises the following steps:
1) BiVO is prepared 4precursor aqueous solution:
1.1) by Bi (NO 3) 35H 2o and Citric Acid Mono are dissolved in deionized water, and stir, and then add monoethanolamine and continue to stir to clarify, obtaining solution A; Wherein, the Bi (NO in deionized water is dissolved in 3) 35H 2the mol ratio of O and Citric Acid Mono is 1.200:1.799; Bi (the NO of every 0.01200mol 3) 35H 2o adds the monoethanolamine of 4.5ml;
1.2) ammonium metavanadate and Citric Acid Mono are dissolved in deionized water, obtain saffron mixing material, then at 70 DEG C, mixing material constant temperature is stirred, make the color of mixing material change navy blue into by crocus and without precipitation, obtain B solution; Wherein, the mol ratio being dissolved in ammonium metavanadate in deionized water and Citric Acid Mono is 1.200:1.799;
1.3) according to the mol ratio of n (Bi): n (V)=1:1, solution A and B solution are mixed, stir 30min, obtain BiVO 4precursor aqueous solution;
2) electrostatic spinning liquid is prepared:
By BiVO 4precursor aqueous solution mixes with polyvinylpyrrolidone ethanolic solution, obtains electrostatic spinning liquid;
3) method of electrostatic spinning prepares BiVO 4fiber:
Electrostatic spinning liquid is loaded in the syringe with 0.5 μm of syringe needle, the voltage of 16kV is added between syringe needle and the receiving system of ground connection, start spinning, electrostatic spinning liquid ejects rear formation from syringe needle and sprays thread, form composite fibre after spraying thread solidification, composite fibre covers the surface of receiving system; Then composite fibre is at room temperature dry, then be incubated at being heated to 450 DEG C, remove remaining polyvinylpyrrolidone, obtain BiVO 4fiber; Wherein, the surface of receiving system is coated with for collecting polyvinyl alcohol BiVO 4the aluminium foil of composite fibre, the distance between syringe needle and aluminium foil is 6cm.
2. method of electrostatic spinning according to claim 1 prepares BiVO 4the method of fiber, is characterized in that: described step 1.1) in the Bi (NO of every 0.01200mol 3) 35H 2o adds the deionized water of 10mL, step 1.2) in the ammonium metavanadate of every 0.01200mol add the deionized water of 10mL; Step 1.3) BiVO 4biVO in precursor aqueous solution 4molar concentration be 0.60mol/L.
3. method of electrostatic spinning according to claim 1 prepares BiVO 4the method of fiber, is characterized in that: described step 2) in the mass concentration of polyvinylpyrrolidone in polyvinylpyrrolidone ethanolic solution be 15%-55%.
4. the method for electrostatic spinning according to claim 1 or 3 prepares BiVO 4the method of fiber, is characterized in that: described step 2) middle BiVO 4the volume ratio of precursor aqueous solution and polyvinylpyrrolidone ethanolic solution is (1:15)-(5:15).
5. method of electrostatic spinning according to claim 4 prepares BiVO 4the method of fiber, is characterized in that: described step 2) middle BiVO 4the volume ratio of precursor aqueous solution and polyvinylpyrrolidone ethanolic solution is 3:15.
6. method of electrostatic spinning according to claim 1 prepares BiVO 4the method of fiber, is characterized in that: described step 3) in composite fibre adopt Muffle furnace heating, the programming rate of Muffle furnace is 1-3 DEG C/min.
7. the method for electrostatic spinning according to claim 1 or 6 prepares BiVO 4the method of fiber, is characterized in that: described step 3) temperature retention time be 1-3h.
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