W18O49 modified polymer composite nanofiber membrane, preparation method thereof and application of W18O49 modified polymer composite nanofiber membrane in degrading organic pollutants

A technology of composite nanofibers and nanofiber membranes, applied in water pollutants, water/sludge/sewage treatment, alkali metal compounds, etc., can solve the problems of limited operability and practical application, easy agglomeration of nanoparticles, and limited photocatalysis. Degradation efficiency of organic pollutants and other issues, to achieve the effect of improving operability and practical application, easy availability of raw materials, improving adsorption effect and photocatalytic ability

Inactive Publication Date: 2019-12-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, W synthesized by the solvothermal method 18 o 49 Nanoparticles are easy to agglomerate, so their specific surface area limits their photocatalytic degradation efficiency of organic pollutants
In addition, W 18 o 49 Nanoparticles are easily suspended in water, and it is difficult to separate them from a large amount of water, which limits the operability and practical application

Method used

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  • W18O49 modified polymer composite nanofiber membrane, preparation method thereof and application of W18O49 modified polymer composite nanofiber membrane in degrading organic pollutants
  • W18O49 modified polymer composite nanofiber membrane, preparation method thereof and application of W18O49 modified polymer composite nanofiber membrane in degrading organic pollutants
  • W18O49 modified polymer composite nanofiber membrane, preparation method thereof and application of W18O49 modified polymer composite nanofiber membrane in degrading organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve polymethyl methacrylate (PMMA) in N,N-dimethylformamide, heat and stir at 70°C until completely dissolved, and prepare a polymethyl methacrylate solution with a mass fraction of 20 wt%. ,;

[0033] (2) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel needle of the syringe is 1mm, the working voltage of the electrospinning equipment is 20kV, the stainless steel needle is used as the anode, and the flat aluminum foil is used as the On the cathode receiving plate, the advancing speed of the syringe is 0.5mL / h, and the distance between the poles is 17cm; Electrospinning is carried out for 5h to obtain a polymethyl methacrylate nanofiber film on the receiving plate; then the nanofiber film is placed under vacuum at 55°C Dry to remove solvent;

[0034] (3) immerse the nanofibrous membrane that 0.1g step (2) obtains in the ethanolic solution of 60mL, 30mmol / L tungsten hexachloride,...

Embodiment 2

[0038] (1) Dissolving polyacrylonitrile (PAN) in N,N-dimethylformamide, heating and stirring at 65° C. until completely dissolved, and preparing a polymer solution with a mass fraction of 12 wt %;

[0039] (2) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel needle is 1mm, the working voltage of the electrospinning equipment is 20kV, the stainless steel needle is used as the anode, and the flat aluminum foil is used as the cathode to receive , the advancing speed was 0.5mL / h, and the distance between the poles was 17cm; electrospinning was carried out for 5h to obtain a polyacrylonitrile nanofiber membrane; then the nanofiber membrane was dried under vacuum at 55°C to remove the solvent;

[0040] (3) Immerse 0.1g nanofibrous membrane in 60mL of 25mmol / L tungsten hexachloride ethanol solution, transfer the whole system to a stainless steel reaction kettle with polytetrafluoroethylene liner, at 180...

Embodiment 3

[0044] (1) dissolving polyacrylonitrile (PAN) in N,N-dimethylformamide, heating and stirring at 50° C. until completely dissolved, and preparing a polyacrylonitrile solution with a mass fraction of 9 wt %;

[0045] (2) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel needle is 1mm, the operating voltage of the electrospinning equipment is 15kV, the stainless steel needle is used as the anode, and the plane aluminum foil is used as the receiving electrode , the propulsion speed was 0.5mL / h, and the distance between the poles was 17cm; electrospinning was carried out for 5h to obtain a PAN nanofiber membrane; then the nanofiber membrane was dried under vacuum at 55°C to remove the solvent;

[0046] (3) Immerse 0.1g nanofibrous membrane in 60mL of 15mmol / L tungsten hexachloride ethanol solution, transfer the whole system to a stainless steel reactor with polytetrafluoroethylene liner, and react at 1...

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Abstract

The invention discloses a W18O49 modified polymer composite nanofiber membrane, a preparation method thereof, and an application of the W18O49 modified polymer composite nanofiber membrane in degrading organic pollutants in water, and belongs to the technical field of nano functional materials. The preparation method comprises the following steps: firstly, preparing a flexible polymer fiber membrane through an electrostatic spinning technology, and then taking the flexible polymer fiber membrane as a precursor template to prepare the W18O49 modified polymer composite nanofiber membrane througha simple solvothermal reaction process. According to the reaction principle, electrostatic spinning nanofibers serve as heterogeneous nucleation sites, and a tungsten source solute in a solvothermalsynthesis precursor and an alcohol solvent are subjected to a hydrolysis reaction to generate a tungsten oxide of W18O49. The prepared composite nanofiber membrane has an adsorption effect on organicpollutants, and the degradation process of the composite nanofiber membrane can be attributed to the result of combined action of adsorption and photocatalysis. In addition, the problem of nanoparticle agglomeration in a use process can be avoided, and the composite nanofiber membrane can be easily separated and recycled after being used.

Description

technical field [0001] The invention belongs to the technical field of nano functional materials, in particular to a W 18 o 49 Modified polymer composite nanofiber membrane, preparation method and its application in degrading organic pollutants in water under the combined action of adsorption / photocatalysis. Background technique [0002] With the continuous development of printing and dyeing industry and pharmaceutical enterprises, the discharge and treatment of organic pollutants in wastewater have attracted extensive attention of researchers all over the world. In recent years, photocatalytic technology is considered to be a promising sewage treatment because it uses sunlight as an energy source to completely degrade organic pollutants into harmless inorganic substances without wasting resources or causing additional environmental pollution. processing technology. [0003] TiO has been reported by Fujishu and Honda since 1972 2 Since it has a better photocatalytic effe...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/30D04H1/4382D04H1/728C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J20/06B01J20/261B01J20/262B01J20/28011B01J20/28038B01J20/28059C02F1/288C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/10D04H1/4382D04H1/728
Inventor 王策马棫滢刘佳迪何大勇邱菊金昌显
Owner JILIN UNIV
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