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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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 soluti

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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Example Embodiment

[0017] Example 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 copper acetate, stir to dissolve, add 1g PAN, stir overnight to obtain precursor spinning solution; pour the above spinning solution into a 10ml syringe, adjust the spinning process parameters As follows: the spinning voltage is 15kV, the injection speed of the syringe is 2mm / h, the receiving distance between the needle and the drum is 10cm, the rotation speed of the drum is 300r / min, and the indoor temperature is controlled to 25°C; put the dried composite fibers into the muffle furnace, 600 calcined at ℃ for 1 h, the heating rate was 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...

Example Embodiment

[0021] Embodiment 2

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

[0023] 1g WCl 6 Dissolve in 10 mL of DMF, stir for 20 minutes, then add 0.5 g of copper acetate, stir to dissolve, add 1 g of PVP, and stir overnight to obtain a spinning solution; pour the spinning solution into a 10 ml syringe to adjust the spinning process parameters are: the spinning voltage is 16kV, the injection speed of the syringe is 3mm / h, the receiving distance between the needle and the drum is 10cm, and the drum rotation speed is 350r / min, that is, the composite nanofibers are obtained, and the temperature is kept at 120 °C for 6h; the dried composite fibers are put into the muffle In a furnace, calcined at 650 °C for 1 h, the heating rate was controlled to be 1 °C / min, and cooled to obtain porous copper tungstate nanofibers.

[0024] figure 2 For the UV-Vis diffuse reflectance spectra of the prepared copper tungstate nanofibers, t...

Example Embodiment

[0025] 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, dissolve by ultrasonic, 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 syringe, the spinning process parameters are adjusted as follows: the spinning voltage is 17kV, the advancing speed of the syringe is 6mm / h, the receiving distance between the needle and the drum is 10cm, and the drum rotation speed is 380r / min, that is, porous nanofibers are obtained, and the temperature is kept at 150°C for 10h; The resulting composite fibers were placed in a muffle furnace, calcined at 550 °C for 1 h, the heating rate was controlled at 5 °C / min, and cooled to obtain yellow copper tungstate nanoparticles.

[0028] image 3 The pore size distribution diagram of copper...

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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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