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Electrostatically spun defect-state TiO2/Fe3O4 composite nanofiber material and preparation method thereof

A technology of composite nanofibers and nanofiber membranes, applied in the field of materials, can solve the problems that limit the development of the Fenton method, achieve the effects of optimizing the electronic energy level structure, saving costs, and improving photocatalytic activity

Pending Publication Date: 2021-10-26
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the Fenton method needs to be carried out under acidic conditions, and the iron-containing sludge produced after the reaction also needs further treatment, which limits the development of the Fenton method

Method used

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  • Electrostatically spun defect-state TiO2/Fe3O4 composite nanofiber material and preparation method thereof
  • Electrostatically spun defect-state TiO2/Fe3O4 composite nanofiber material and preparation method thereof
  • Electrostatically spun defect-state TiO2/Fe3O4 composite nanofiber material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1.6 g of polyvinylpyrrolidone and 3.2 g of polymethyl methacrylate solid powder into 20 mL of dimethylformamide, and form a homogeneous solution by magnetic stirring at room temperature, then add 2 ml of acetic acid and 4 ml of tetra-n-butyl titanate Esters and 0.095 g of anhydrous ferric chloride were stirred for 2 h to obtain a homogeneous spinning solution, in which the atomic ratio of Ti and Fe was 20:1. Transfer the prepared spinning solution into a 20 ml syringe for high-voltage electrospinning. The electrospinning control voltage was 18kV, the drum speed was 400 r / min, the distance between the spinning head tip and the drum receiver was 15 cm, and the flow rate of the spinning solution was 1 mL h -1 , received by aluminum foil, and prepared nanofiber membrane; the obtained nanofiber membrane was calcined in a tube furnace with a heating rate of 10 °C min -1 , the temperature was set at 700 °C, and the calcination time was 2h; the calcined material was mixed ...

Embodiment 2

[0028]Add 1.0 g of polyvinylpyrrolidone and 2.0 g of polymethyl methacrylate solid powder into 20 mL of dimethylformamide, and form a homogeneous solution by magnetic stirring at room temperature, then add 2 ml of acetic acid and 4 ml of tetra-n-butyl titanate Esters and 0.095 g of anhydrous ferric chloride were stirred for 2 h to obtain a homogeneous spinning solution, in which the atomic ratio of Ti and Fe was 20:1. Transfer the prepared spinning solution into a 20 ml syringe for high-voltage electrospinning. The electrospinning control voltage was 15kV, the drum speed was 400 r / min, the distance between the spinning head tip and the drum receiver was 15 cm, and the flow rate of the spinning solution was 1 mL h -1 , received by aluminum foil, and prepared nanofiber membrane; the obtained nanofiber membrane was calcined in a tube furnace with a heating rate of 10 °C min -1 , the temperature was set at 350 °C, and the calcination time was 3h; the calcined material was mixed w...

Embodiment 3

[0030] Add 1.6 g of polyvinylpyrrolidone and 3.2 g of polymethyl methacrylate solid powder into 20 mL of dimethylacetamide, and form a homogeneous solution by magnetic stirring at room temperature, then add 2 ml of acetic acid and 4 ml of tetraethyl titanate and 0.04 g of anhydrous ferric chloride, and continued to stir for 0.5 h to obtain a uniform spinning solution, in which the atomic ratio of Ti and Fe was 50:1. Transfer the prepared spinning solution into a 20 ml syringe for high-voltage electrospinning. The electrospinning control voltage was 18 kV, the drum speed was 400 r / min, the distance between the spinning head tip and the drum receiver was 20 cm, and the flow rate of the spinning solution was 1 mL h -1 , received by aluminum foil, and prepared nanofiber membrane; the obtained nanofiber membrane was calcined in a tube furnace with a heating rate of 10 °C min -1 , the temperature was set at 600 °C, and the calcination time was 2.5 h; the calcined material was mixed...

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Abstract

The invention relates to a defect-state TiO2 / Fe3O4 composite nanofiber material and a preparation method thereof, and belongs to the technical field of materials. The preparation method of the material comprises the following steps: firstly, dispersing a titanium source, an iron source and a high-molecular polymer in a solvent to prepare a stable and uniform solution; then preparing the solution into a nanofiber membrane through an electrostatic spinning technology; and calcining the nanofiber membrane, grinding the calcined material and sodium borohydride, and reducing in a nitrogen atmosphere to obtain the defect-state TiO2 / Fe3O4 composite nanofiber material. The method is simple to operate, easy to control, environment-friendly and capable of realizing continuous production, and the obtained defect-state TiO2 / Fe3O4 composite nanofiber material has good crystallinity and photoresponsiveness and has excellent degradation performance on organic pollutants in a water environment.

Description

technical field [0001] The invention relates to a defect state TiO 2 / Fe 3 o 4 A composite nanofiber material and a preparation method thereof belong to the field of material technology. Background technique [0002] In the advanced oxidation process, a lot of preliminary research work is mostly focused on the degradation of pollutants by Fenton technology. However, the Fenton method needs to be carried out under acidic conditions, and the iron-containing sludge produced after the reaction also needs further treatment, which limits the development of the Fenton method. As another advanced oxidation process, photocatalytic technology has the advantages of mild reaction conditions, simple technical equipment and no secondary pollution. Introducing the Fenton reaction into the photocatalytic system to form a photo-Fenton system can effectively solve the problem of high-valent metal ions / low-valent metal ions in the Fenton process, and at the same time, it can also solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/06B01J37/16B01J37/34B01J37/08B82Y30/00B82Y40/00C01B3/04C02F1/30C02F1/72C02F101/30
CPCB01J23/745B01J23/002B01J37/16B01J37/342B01J37/08B82Y30/00B82Y40/00C01B3/042C02F1/30C02F1/725C02F2305/10C02F2101/30B01J35/58B01J35/40B01J35/39Y02E60/36
Inventor 郑煜铭周园园邵再东
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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