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Preparation method of beaded carbon nanofiber-loaded titanium oxide photocatalyst

A technology of carbon nanofibers and photocatalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of easy shedding, uneven distribution, etc., and achieve sufficient exposure, large specific surface area, and circulation good stability effect

Active Publication Date: 2021-08-24
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Support TiO by different methods such as direct coating, vapor deposition, hydrolysis precipitation, etc. 2 There are problems such as easy falling off and uneven distribution, and the solvothermal method can make TiO 2 Evenly and firmly loaded on the carrier

Method used

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  • Preparation method of beaded carbon nanofiber-loaded titanium oxide photocatalyst
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  • Preparation method of beaded carbon nanofiber-loaded titanium oxide photocatalyst

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preparation example Construction

[0050] The preparation method of the beaded, carbon nanofiber-loaded, nitrogen-fluorine co-doped oxygen-deficient titanium oxide photocatalyst that the present invention proposes comprises the following steps and contents:

[0051] (1) First, dissolve 1-2.5g of analytically pure polyacrylonitrile powder with a molecular weight of 100,000-150,000 in 15mL of N,N-dimethylformamide, and magnetically stir for 10-12h at 50-60°C under heat preservation conditions. Obtain a transparent solution that is fully dissolved and uniformly dispersed;

[0052] (2) Then the solution obtained in step (1) is placed in a syringe, and a polyacrylonitrile fiber membrane is prepared by electrospinning, and it is set aside;

[0053] (3) Then mix 1.5-9.6g of analytically pure tetrabutyl titanate, 0.02-0.15g of analytically pure ammonium fluoride, and 3-5mL of analytically pure glacial acetic acid in 40-80mL of absolute ethanol, and stir magnetically at room temperature for 20- 40min to obtain a homoge...

Embodiment

[0062] Example: 1.5 g of analytically pure polyacrylonitrile powder with a molecular weight of 150,000 was dissolved in 15 mL of N,N-dimethylformamide, and magnetically stirred at 60° C. for 10 h to obtain a transparent solution. Then use a 10mL syringe to draw 10mL of the above solution, install a No. 22 flat metal needle, set the spinning parameters as follows: the spinning voltage is 16kV, the spinning temperature is 30°C, and the humidity is 50%. The spacing is 15 cm, the rotational speed of the receiving roller is 60 rpm, and the flow rate of the solution is 0.0015 mm / s; spin to obtain a white polyacrylonitrile fiber membrane for use. Then, add 60mL of absolute ethanol, 4mL of glacial acetic acid, 5.8g of tetrabutyl titanate and 0.1g of ammonium fluoride into a 100mL beaker, stir magnetically at room temperature for 40min and mix well; then transfer to a hydrothermal reaction kettle with a capacity of 100mL, Add about 0.25g of the prepared polyacrylonitrile fiber membrane...

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Abstract

The invention relates to a preparation method of a beaded carbon nanofiber-loaded titanium oxide photocatalyst, belonging to the technical field of preparation and application of photocatalytic materials. The titanium oxide photocatalyst is in a uniform bead string shape in appearance, and is formed by nitrogen-and-fluorine co-doped oxygen-deficient titanium oxide microspheres which are connected in series and loaded by carbon nanofibers; and the titanium oxide material can be directly used for simulating photocatalytic degradation of pollutants under sunlight, and is a photocatalyst with excellent performance. The method comprises the following steps: with polyacrylonitrile as a raw material, preparing polyacrylonitrile nanofibers through an electrostatic spinning technology at first; with tetrabutyl titanate as a titanium source, adding ammonium fluoride and glacial acetic acid, and preparing a polyacrylonitrile fiber-loaded titanium oxide sample through a solvothermal method; and finally, performing high-temperature heat treatment in a vacuum tube furnace in an inert atmosphere to obtain the titanium oxide photocatalyst. The method has the advantages of usage of easily available raw materials, high product yield, low cost and simple and safe production process, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a beaded carbon nanofiber loaded titanium oxide photocatalyst, which belongs to the technical field of photocatalytic material preparation and application thereof. Background technique [0002] The development and utilization of fossil energy has promoted the development of industrialization, but it has also brought enormous pressure to the environment. Since the 21st century, the problem of environmental pollution has become increasingly prominent and has become a common problem faced by all mankind. Especially in the water body environment, there are many types of pollution caused by printing and dyeing industry, agriculture and forestry, and domestic wastewater, with complex components. The treatment of various industrial and domestic wastewater has become an urgent problem to be solved. [0003] The development and utilization of semiconductor photocatalysis technology provides new ideas for alleviat...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J35/08B01J35/06C02F1/30C02F101/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/38C02F2305/10C02F2101/30B01J35/39B01J35/58B01J35/40B01J35/51Y02W10/37
Inventor 陈燕彭志坚符秀丽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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