CN113308763B - Method and device for preparing mesoporous nanotube by combining centrifugal spinning with chelating coordination reaction - Google Patents
Method and device for preparing mesoporous nanotube by combining centrifugal spinning with chelating coordination reaction Download PDFInfo
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/10—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material by decomposition of organic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
- D01D13/02—Elements of machines in combination
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D7/00—Collecting the newly-spun products
- D01D7/02—Collecting the newly-spun products in centrifugal spinning pots
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Materials Engineering (AREA)
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- Inorganic Fibers (AREA)
Abstract
The invention discloses a method and a device for preparing mesoporous nanotubes by combining centrifugal spinning with chelate coordination reaction, wherein the preparation method comprises the following steps: firstly, preparing spinning precursor solution by utilizing sodium alginate and polyethylene oxide (PEO); then adding the spinning precursor solution into a spinning sample tank of a centrifugal spinning device, carrying out centrifugal spinning operation to obtain sodium alginate/PEO spinning fibers, and drying at low temperature for later use; finally, adding the dried spinning fiber into the prepared transition metal chelating coordination reaction liquid, and keeping the temperature for 12 hours at room temperature to generate the fiber with a special egg box structure; after the reaction is finished, cleaning, drying and annealing treatment are carried out to obtain the mesoporous nanotube material. The invention adopts the centrifugal spinning technology to prepare the nanofiber precursor in large batch, thereby greatly improving the production efficiency; higher safety and lower cost; by adopting a chelating coordination reaction, the material can perform ion exchange with various metals, and can be used for preparing transition metal oxide nanotube materials with various components.
Description
Technical Field
The invention belongs to the technical field of nano material preparation, and particularly relates to a method and a device for preparing a mesoporous nanotube by combining centrifugal spinning with chelate coordination reaction.
Background
Energy is the material basis on which human beings live and develop, and in recent years, along with the rapid development of science and technology, a large amount of energy is exploited and used, but the transient utilization of energy causes serious environmental pollution, and especially the environmental pollution caused by fossil energy forms a world difficult problem to be solved urgently. Although the pollution to the environment is small, the new renewable energy sources, such as wind energy, tidal energy and the like, have great spatial non-uniformity and uncertainty of time, and are difficult to be applied efficiently. The electrochemical energy storage can flexibly configure energy supply according to different application requirements, is less restricted by external environment, and has the advantages of high response speed, stable current output and the like. At present, common electrochemical energy storage mainly refers to secondary batteries, such as lithium ion batteries, sodium ion batteries, zinc ion batteries, lithium sulfur batteries and the like.
In general, electrochemical reactions are easier to perform in nanoscale materials, and therefore, it is necessary to perform nanocrystallization treatment on an electrode material, that is, to reduce the size of the material to the nanometer level as much as possible, and form a series of reasonable material structures such as nanoparticles, nanosheets, nanospheres and the like, as well as porous, hollow, core-shell and the like. The mesoporous nanotube electrode material generally shows excellent electrochemical performance, and mainly benefits from larger specific surface area, more electrochemical active sites can be provided, the dynamic characteristic of electrochemical reaction is improved, and meanwhile, the hollow structure and the porous characteristic are favorable for relieving the volume change in the electrochemical circulation process, so that the stability of the electrode structure is maintained.
In recent years, the research on transition metal oxide nanotube materials is very extensive, and the preparation methods are also infinite, such as a hard template method, a soft template method, a hydrothermal method, a metal organic framework method, an electrostatic spinning method and the like. But all have some defects, such as the hard template method and the soft template method have the defects of lower yield, serious reagent waste, complicated preparation process and the like; the hydrothermal method has high requirements on preparation equipment, low controllability, low yield and poor safety performance; the metal organic framework method has stronger selectivity on organic ligands and metal ions or clusters, and has great technical difficulty; the electrostatic spinning method has the defects of large influence on solute concentration, large danger, low yield and the like.
Disclosure of Invention
Aiming at the defects pointed out in the background technology, the invention provides a method and a device for preparing a mesoporous nanotube by combining centrifugal spinning with chelating coordination reaction, and aims to solve the problems in the prior art in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for preparing mesoporous nanotubes by combining centrifugal spinning with chelating coordination reaction comprises the following steps:
(1) weighing a certain amount of sodium alginate and polyethylene oxide (PEO), placing the sodium alginate and the PEO into a beaker, adding deionized water, and stirring until the sodium alginate and the PEO are completely dissolved; standing until foams are completely removed to obtain spinning precursor liquid;
(2) adding the spinning precursor solution into a spinning sample tank on a centrifugal spinning device, carrying out centrifugal spinning operation at the rotating speed of 2000-3000rpm, taking down the sodium alginate/PEO spinning fiber after the spinning process is finished, and drying at a low temperature for later use;
(3) weighing a certain amount of transition metal salt, putting the transition metal salt into a reactor, adding deionized water, and magnetically stirring to obtain a uniform solution, namely a chelating coordination reaction solution;
(4) adding the dried sodium alginate/PEO spinning fiber into the chelating coordination reaction solution, and keeping the solution at room temperature for 12 hours to generate a fiber with a specific egg box structure; after the reaction is finished, washing the fibers for multiple times by using deionized water and ethanol, and then putting the fibers into a vacuum drying oven for drying for later use;
(5) and annealing the dried fiber to obtain the mesoporous nanotube material.
Preferably, during spinning, the air around the spinning sample slot is heated and the air temperature is controlled at 45-55 ℃.
Preferably, the transition metal salt comprises nickel/cobalt acetate, zinc acetate, manganese acetate or ferric chloride.
Preferably, the annealing treatment method comprises the following steps: annealing the dried fiber at 500 ℃ for 120min in air atmosphere, and raising the temperature at 5 ℃ for min -1 The obtained mesoporous nanotube material is a transition metal oxide nanotube material.
Preferably, the annealing treatment method comprises the following steps: mixing the dried fiber and sulfur powder, annealing at 500 ℃ for 120min under the protection of inert gas, and heating at the rate of 5 ℃ for min -1 The obtained mesoporous nanotube material is a transition metal sulfide-carbon composite nanotube material.
Preferably, the mass ratio of the dried fiber to the sulfur powder is 1: 5.
The invention further provides a device for preparing the mesoporous nanotube by combining centrifugal spinning with chelate coordination reaction, which comprises a centrifugal spinning device and a chelate coordination reaction device, wherein the chelate coordination reaction device comprises a reactor; the centrifugal spinning device comprises a tray arranged on a supporting table, a collecting plate arranged on the tray and a centrifugal rotating head arranged in the collecting plate, wherein a motor is arranged below the supporting table, shaft holes are formed in the center of the tray and the center of the collecting plate, a rotating shaft is arranged in each shaft hole in a penetrating mode, the lower end of the rotating shaft is connected with an output shaft of the motor, the centrifugal rotating head is fixed to the upper end of the rotating shaft, a spinning sample groove is formed in the centrifugal rotating head, and a spinning nozzle is arranged on the side wall of the spinning sample groove.
Preferably, a heating lamp is arranged above the collecting plate.
Preferably, the collecting plate comprises a base plate and a plurality of collecting rods vertically spaced around the base plate.
Preferably, the side wall of the spinning sample groove is centrally and symmetrically provided with a plurality of groups of spinning nozzles by taking the axis of the rotating shaft as the shaft, the inner ends of the spinning nozzles are communicated with the spinning sample groove, and the outer ends of the spinning nozzles are spinning ports; and the top of the spinning sample groove is provided with a buckle cover.
Compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects:
(1) the preparation of the mesoporous nanotube material is carried out at low temperature (close to normal temperature), and has low requirements on reaction equipment, strong operability and low energy consumption.
(2) The method combines centrifugal spinning and chelating reaction, adopts a centrifugal spinning technology, can prepare nanofiber precursors in large batch, and greatly improves the production efficiency; compared with the traditional electrostatic spinning technology, the electrostatic spinning device has higher safety and lower cost, and is not disturbed by the problems of blockage of a spinning needle head and the like. The simple chelating coordination reaction is adopted, ion exchange can be carried out between the transition metal oxide nanotube and various metals, and transition metal oxide nanotube materials with various components can be prepared.
(3) The spinning precursor solution is prepared from sodium alginate and PEO, and utilizes special functional groups of the sodium alginate and metalChelate coordination reaction between ions (M) capable of binding Na on the G unit in the alginate molecule + Replacing to generate a special egg box structure; meanwhile, as soluble PEO is added into the centrifugal spinning solution, when ion exchange occurs in the process of carrying out chelate coordination reaction, PEO can be dissolved in water to generate gaps, so that the target product nanotube has better mesoporous characteristics at the same time.
Drawings
Figure 1 is an SEM image of sodium alginate/PEO spun fibers at various magnifications provided by examples of the invention.
Fig. 2 is an SEM image of a nickel cobaltate mesoporous nanotube material at different magnifications provided by an embodiment of the invention.
FIG. 3 is an apparatus for preparing mesoporous nanotube material by centrifugal spinning combined with chelate coordination reaction according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a collecting plate according to an embodiment of the present invention.
In the figure: 1. a support table; 2. a motor; 3. a tray; 4. a rotating shaft; 5. centrifuging and rotating the head; 6. spinning a sample groove; 7. a spinning solvent; 8. a spinneret orifice; 9. spinning fibers; 10. a collection plate; 101. a chassis; 102. a collection rod; 11. a heating lamp; 12. a beaker; 13. an aqueous metal solution; 14. spinning fibers; 15. an egg box structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention adopts a centrifugal spinning technology and combines simple chelate coordination reaction to controllably prepare the mesoporous nanotube material, and the method comprises the following steps:
(1) 0.5g of sodium alginate and 0.5g of polyethylene oxide (PEO) are weighed by an analytical balance, placed in a beaker, added with 100mL of deionized water, stirred until completely dissolved, and kept stand for a period of time after being stirred uniformly until foams are completely removed, so as to obtain the spinning precursor solution.
(2) Adding the spinning precursor solution into a spinning sample tank on a centrifugal spinning device, and carrying out centrifugal spinning operation at the rotating speed of 2000-3000 rpm. The air around the spinning sample can be heated in the spinning process, so that the temperature of the air around the spinning sample is 45-55 ℃ (about 50 ℃), and the air around the spinning is heated, so that the fibers from a spinning nozzle are solidified as soon as possible, the fibers are rapidly molded, and the preparation efficiency is improved; in addition, the size of the fiber can be controlled by adjusting the rotating speed, and different process requirements are met.
(3) And after the spinning process is finished, taking down the sodium alginate/PEO spinning fiber, drying at low temperature for later use, wherein SEM images under different magnifications are shown in figure 1.
(4) Weighing 8mmol transition metal salt including nickel acetate/cobalt acetate, zinc acetate, manganese acetate or ferric chloride, etc. And (3) putting the mixture into a beaker, adding 200mL of deionized water, and magnetically stirring to obtain a uniform solution, namely the chelating coordination reaction solution.
(5) Adding the dried sodium alginate/PEO spinning fiber into a chelating coordination reaction solution, keeping the solution at room temperature for 12 hours, and carrying out chelating coordination reaction between a special functional group of the sodium alginate and metal ions (M) to obtain Na on a G unit in an alginate molecule + Replacing, and generating the fiber with a special egg box structure; meanwhile, PEO in the spinning fiber can be dissolved in water to generate gaps, which is beneficial to generating good mesoporous characteristics of final target products.
(6) After the reaction is finished, the fibers after the chelation reaction are washed for many times by deionized water and ethanol, and then are placed into a vacuum drying oven to be dried for standby.
(7) And annealing the dried fiber to obtain the mesoporous nanotube material. Adopting different return treatment methods to obtain specific mesoporous nano material, and annealing the dried fiber at 500 ℃ for 120min in air atmosphere at the heating rate of 5 ℃ for min -1 Then the obtained mesoporous nanotube material is a transition metal oxide nanotube material; if the dried fiber is mixed with 5 times of sulfur powder by mass and then annealed for 120min at 500 ℃ under the protection of inert gas, the heating rate is 5 ℃ min -1 Then the obtained mesoporous nanotube material isA transition metal sulfide-carbon composite nanotube material.
When the transition metal adopts nickel acetate/cobalt acetate, the SEM images of the finally prepared nickel cobaltate mesoporous nanotube material under different magnifications are shown in fig. 2, and the mesoporous nanotube structure can be clearly seen from the images.
The method for preparing the mesoporous nanotube material by combining centrifugal spinning with simple chelating coordination reaction has simple process, easily obtained required raw materials and high yield. The centrifugal spinning technology is adopted, the nanofiber precursor can be prepared in a large scale, the production efficiency is greatly improved, compared with the traditional electrostatic spinning technology, the safety is higher, the cost is lower, and the problems of blockage of a spinning needle and the like are avoided; the chelation reaction is simple to operate, and various metal ions can be selected for ion exchange, so that the transition metal oxide mesoporous nanotube material with various components can be prepared, and the method has a good application prospect in the field of electrochemical energy storage.
The device for preparing the mesoporous nanotube by combining centrifugal spinning with chelate coordination reaction, which is designed by the invention, is shown in figure 3, and comprises a centrifugal spinning device and a chelate coordination reaction device, wherein the chelate coordination reaction device comprises a reactor, and a beaker can be adopted in an experiment. Centrifugal spinning device includes brace table 1, motor 2, centrifugation turn round 5 and collecting board 10, sets up circular tray 3 on the brace table 1, sets up collecting board 10 (refer to fig. 4) on the tray 3, and collecting board 10 includes chassis 101 and collection pole 102, and on tray 3 was arranged in to chassis 101, the vertical interval sets up a plurality of collection poles 102 around the chassis 101. A motor 2 is fixed below a supporting table 1, shaft holes are formed in the centers of a tray 3 and a chassis 101, a rotating shaft 4 penetrates through the shaft holes, the lower end of the rotating shaft 4 is connected with an output shaft of the motor 2, the upper end of the rotating shaft 4 is located in a collecting plate 10, a centrifugal rotating head 5 is fixedly arranged at the upper end of the rotating shaft 4, a spinning sample groove 6 is formed in the centrifugal rotating head 5 and used for containing a spinning solvent 7, a plurality of groups of spinning nozzles are arranged on the side wall of the spinning sample groove 6, the plurality of groups of spinning nozzles are arranged in a centrosymmetric mode by taking the axis of the rotating shaft 4 as an axis, the inner ends of the spinning nozzles are communicated with the spinning sample groove 6, spinning nozzles 8 are arranged at the outer ends of the spinning nozzles, and an end cover can be arranged at the outer end of each spinning nozzle 8 to prevent liquid in the spinning sample groove 6 from flowing out before spinning operation; further, a heating lamp 11 is provided above the collecting plate 10. When centrifugal spinning is carried out, a spinning solvent 7 is placed in a spinning sample groove 6, a heating lamp 11 is turned on, the temperature of air around spinning is measured to be ensured to be about 50 ℃, then an end cover of a spinning nozzle 8 is opened, a motor 2 is started, the motor 2 drives a rotating shaft 4 to rotate, and further drives a centrifugal rotating head 5 to rotate, so that the spinning solvent 7 is sprayed out from the spinning nozzle 8 in the rotating process of the spinning sample groove 6 to form spinning fibers 9, the spinning fibers 9 are wound on a base plate 101 of a collecting plate 10, and the collecting rod 102 effectively prevents the spinning fibers 9 from falling out of the collecting plate 10. In order to prevent the solvent from being thrown out from the top end of the spinning sample groove 6 in the spinning process, a buckle cover is additionally arranged at the top of the spinning sample groove 6. After centrifugal spinning is finished, spinning fibers 14 dried at low temperature are added into a beaker 12, and meanwhile, a transition metal aqueous solution 13 is added for chelation reaction, so that the mesoporous nanotube material with the egg box structure 15 is obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for preparing mesoporous nanotubes by combining centrifugal spinning with chelating coordination reaction is characterized by comprising the following steps:
(1) weighing a certain amount of sodium alginate and polyethylene oxide (PEO), placing the sodium alginate and the PEO into a beaker, adding deionized water, and stirring until the sodium alginate and the PEO are completely dissolved; standing until foams are completely removed to obtain spinning precursor liquid;
(2) adding the spinning precursor solution into a spinning sample tank on a centrifugal spinning device, carrying out centrifugal spinning operation at the rotating speed of 2000-3000rpm, taking down the sodium alginate/PEO spinning fiber after the spinning process is finished, and drying at a low temperature for later use;
(3) weighing a certain amount of transition metal salt, putting the transition metal salt into a reactor, adding deionized water, and magnetically stirring to obtain a uniform solution, namely a chelating coordination reaction solution;
(4) adding the dried sodium alginate/PEO spinning fiber into the chelating coordination reaction solution, and keeping the solution at room temperature for 12 hours to generate a fiber with a specific egg box structure; after the reaction is finished, washing the fibers for multiple times by using deionized water and ethanol, and then putting the fibers into a vacuum drying oven for drying for later use;
(5) and annealing the dried fiber to obtain the mesoporous nanotube material.
2. The method for preparing mesoporous nanotubes by centrifugal spinning combined with chelate coordination reaction according to claim 1, wherein the air surrounding the spinning sample tank is heated and the temperature of the air is controlled to be 45-55 ℃ during the spinning process.
3. The method of claim 1, wherein the transition metal salt comprises nickel/cobalt acetate, zinc acetate, manganese acetate, or ferric chloride.
4. The method for preparing mesoporous nanotubes by centrifugal spinning combined with chelate coordination reaction according to claim 3, wherein the annealing treatment method comprises the following steps: annealing the dried fiber at 500 ℃ for 120min in air atmosphere, and raising the temperature at 5 ℃ for min -1 The obtained mesoporous nanotube material is a transition metal oxide nanotube material.
5. The method for preparing mesoporous nanotubes by centrifugal spinning combined with chelating and coordinating reaction according to claim 3, wherein the annealing treatment method comprises the following steps: mixing the dried fiber and sulfur powder, annealing at 500 ℃ for 120min under the protection of inert gas, and heating at the rate of 5 ℃ for min -1 The obtained mesoporous nanotube material is a transition metal sulfide-carbon composite nanotube material.
6. The method for preparing mesoporous nanotubes by combining centrifugal spinning with chelate coordination reaction according to claim 5, wherein the mass ratio of the dried fibers to the sulfur powder is 1: 5.
7. An apparatus for preparing mesoporous nanotubes by combining centrifugal spinning with chelating coordination reaction, which is used for the method for preparing mesoporous nanotubes by combining centrifugal spinning with chelating coordination reaction according to any one of claims 1 to 6, and comprises a centrifugal spinning apparatus and a chelating coordination reaction apparatus, wherein the chelating coordination reaction apparatus comprises a reactor; the centrifugal spinning device comprises a tray arranged on a supporting table, a collecting plate arranged on the tray and a centrifugal rotating head arranged in the collecting plate, wherein a motor is arranged below the supporting table, shaft holes are formed in the centers of the tray and the collecting plate, a rotating shaft is arranged in each shaft hole in a penetrating mode, the lower end of the rotating shaft is connected with an output shaft of the motor, the centrifugal rotating head is fixed at the upper end of the rotating shaft, a spinning sample groove is formed in the centrifugal rotating head, and a spinning nozzle is arranged on the side wall of the spinning sample groove.
8. The apparatus for preparing mesoporous nanotubes by centrifugal spinning combined with chelating and coordinating reaction as claimed in claim 7, wherein a heating lamp is disposed above the collecting plate.
9. The apparatus for preparing mesoporous nanotubes by centrifugal spinning combined with chelating and coordinating reaction as claimed in claim 8, wherein the collecting plate comprises a bottom plate and collecting rods, and a plurality of collecting rods are vertically spaced around the bottom plate.
10. The apparatus for preparing mesoporous nanotubes by centrifugal spinning combined with chelating and coordination reaction as claimed in claim 7, wherein the side wall of the spinning sample tank is provided with a plurality of sets of spinning nozzles symmetrically centered around the axis of the rotating shaft, the inner ends of the spinning nozzles are communicated with the spinning sample tank, the outer ends of the spinning nozzles are spinning nozzles, and the top of the spinning sample tank is provided with a buckle cover.
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