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Preparation method of copper tungstate nanometer fiber photocatalyst

A nanofiber, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the unfavorable preparation, lack of copper tungstate nanofiber materials, etc. problem, to achieve the effect of uniform diameter, wide pore size distribution, and improved removal efficiency

Active Publication Date: 2019-06-25
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrospinning technology is a powerful means of synthesizing nanofiber materials, but copper tungstate nanofiber materials have not been reported, mainly because of the lack of technical solutions related to the formula of copper tungstate spinning solution and the parameters of copper tungstate spinning process. Not conducive to the preparation of copper tungstate nanofiber materials

Method used

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  • Preparation method of copper tungstate nanometer fiber photocatalyst
  • Preparation method of copper tungstate nanometer fiber photocatalyst
  • Preparation method of copper tungstate nanometer fiber photocatalyst

Examples

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Effect test

Embodiment 1

[0018] A preparation method of copper tungstate nanofiber photocatalyst, the specific steps are as follows:

[0019] 1g WCl 6 Dissolve in 10mL of DMF, stir to dissolve, then add 0.5g of copper acetate, stir to dissolve, add 1g of PAN, stir overnight to obtain the precursor spinning solution; pour the above spinning solution into a 10ml syringe, adjust the spinning process parameters The spinning voltage is 15kV, the injector advance speed is 2mm / h, the receiving distance between the needle and the drum is 10cm, the drum speed is 300r / min, and the room temperature is controlled at 25°C; put the dried composite fiber into the muffle furnace, 600 Calcining at ℃ for 1 hour, the heating rate is controlled at 1 ℃ / min, and cooled to obtain porous copper tungstate nanofibers.

[0020] figure 1 The X-ray diffraction pattern of copper tungstate nanofibers is given. It can be seen from the figure that the crystal form of copper tungstate is well matched to the triclinic system, and the...

Embodiment 2

[0022] A preparation method of copper tungstate nanofiber photocatalyst, the specific steps are as follows:

[0023] 1g WCl 6 Dissolve in 10mL of DMF, stir for 20 minutes, then add 0.5g of copper acetate, stir to dissolve, add 1g of PVP, stir overnight to obtain spinning solution; pour the above spinning solution into a 10ml syringe, adjust spinning process parameters The spinning voltage is 16kV, the injector advance speed is 3mm / h, the receiving distance between the needle and the roller is 10cm, and the roller speed is 350r / min to obtain the composite nanofiber, and the temperature is kept at 120°C for 6h; the dried composite fiber is put into the muffle In the furnace, calcinate at 650°C for 1 hour, control the heating rate at 1°C / min, and cool to obtain porous copper tungstate nanofibers.

[0024] figure 2 The ultraviolet-visible diffuse reflection spectrum of the prepared copper tungstate nanofibers shows that the absorption of copper tungstate increases sharply below...

Embodiment 3

[0026] A preparation method of copper tungstate nanofiber photocatalyst, the specific steps are as follows:

[0027] Dissolve 0.61g of ammonium tungstate in 12mL of DMF, ultrasonically dissolve, then add 0.44g of copper acetate, stir to dissolve, add 1.5g of PVP, heat to dissolve, stir overnight to obtain spinning solution; pour the above spinning solution into 10ml In the injector, adjust the spinning process parameters as follows: spinning voltage 17kV, injector advance speed 6mm / h, needle and drum receiving distance 10cm, drum speed 380r / min, namely porous nanofibers, 150°C constant temperature 10h; dry The final composite fiber was put into a muffle furnace, calcined at 550°C for 1 hour, the heating rate was controlled at 5°C / min, and cooled to obtain yellow copper tungstate nanoparticles.

[0028] image 3 It is the pore size distribution diagram of copper tungstate measured by specific surface area and pore analyzer. It can be seen from the figure that the pore size dis...

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Abstract

The invention relates to a preparation method of a copper tungstate nanometer fiber photocatalyst, and belongs to the technical field of photocatalysis. According to the preparation method, adopted one-dimensional copper tungstate nanometer fiber is prepared through static spinning technology, is uniform in diameter, large in specific surface area, and short in photon-generated carrier transmission distance, and is capable of increasing visible light organic matter degradation catalytic activity effectively. The preparation method mainly comprises following steps: an inorganic tungsten salt and an inorganic copper salt are dissolved in ethanol of DMF solution, PAN or PVP is added so as to obtain a spinning solution, a static spinning device is adopted to obtain composite fiber, and high temperature sintering is carried out so as to obtain the porous copper tungstate nanometer fiber. The preparation method is simple in operation; cost is low; it is promising to realize large scale preparation of copper tungstate nanometer fiber; and the application prospect in the field of environment and energy is promising.

Description

technical field [0001] The invention relates to a method for preparing a copper tungstate nanofiber photocatalyst, which belongs to the field of photocatalysis technology. More specifically, the invention provides a copper tungstate nanofiber photocatalyst with high photocatalytic activity, large surface area and high stability. Catalyst preparation method. Background technique [0002] With the rapid growth of my country's economy and the development of global industrialization, the problem of environmental pollution is becoming more and more serious. Finding a low-cost green common technology is of great significance to the control of environmental pollutants. Semiconductor photocatalysis technology can directly use solar energy and oxygen in the air to mineralize organic pollutants in solution into non-toxic CO at normal temperature and pressure. 2 Molecules, this technology has low processing cost, simple operation, no secondary pollution, and has broad application pro...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J35/10B01J35/06C02F1/30C02F101/36C02F101/38
Inventor 熊贤强陈桂华王勇范利亚武承林
Owner TAIZHOU UNIV
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