Method for preparing Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material

A composite material, polypyrrole technology, applied in the field of photocatalysis, can solve the problems of affecting the separation efficiency of electron and empty electron pairs, reducing the photocatalytic performance of composite materials, reducing the photocatalytic performance of composite materials, etc., to achieve strong photocatalytic degradation ability, Efficient photocatalytic performance and magnetic recycling performance, and the effect of improving magnetic recycling performance and catalytic performance

Pending Publication Date: 2019-05-10
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Titanium dioxide is a common photocatalytic degradation material. Although it has a high photocatalytic degradation activity for water pollutants under visible light conditions, it has shortcomings in post-treatment and recycling, such as high-speed centrifugation and the addition of precipitants. etc., which is not conducive to practical application
[0004] Ferroferric oxide is an excellent soft magnetic material, which is cheap, non-toxic, easy to prepare, and has good magnetism. The introduction of iron will reduce the photocatalytic performance of the composite material. This is because the electrons of ferroferric oxide are relatively easy to move into titanium dioxide, which affects the separation efficiency of electrons and empty electron pairs, resulting in a decrease in the photocatalytic performance of the composite material.

Method used

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  • Method for preparing Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material
  • Method for preparing Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material
  • Method for preparing Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material

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Embodiment 1

[0027] a kind of Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 The preparation method of / ZnO composite material comprises the steps:

[0028] S1, Fe 3 o 4 Preparation: Dissolve ferrous chloride, potassium sulfite, polyvinylpyrrolidone and potassium hydroxide in deionized water at a mass ratio of 1.5:0.8:0.7:0.7, and react at a constant temperature under the protection of helium at a temperature of 170°C The reaction time is 8h, and Fe is prepared after separation, washing and drying. 3 o 4 ;

[0029] figure 1 For the Fe prepared in this embodiment 3 o 4 The TEM image of the prepared Fe 3 o 4 It can be seen from the TEM image that the prepared Fe 3 o 4 It is in the shape of microspheres, with relatively uniform size distribution and high roundness.

[0030] S2, Fe 3 o 4 / Preparation of polypyrrole: Fe prepared by step S1 3 o 4 Dispersed in deionized water, Fe 3 o 4 The solid-to-liquid ratio of the mass to the volume of deionized water is 1g:200mL, and then pyrrole...

Embodiment 2

[0042] In order to examine the Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 The photocatalytic performance of / ZnO composite material, get the Fe that 5mg embodiment 1 prepares 3 o 4 / polypyrrole / polyaniline / TiO 2 / ZnO composite material was added to 100ml of methyl orange solution with a concentration of 1mg / L, stirred under dark conditions for the first 1h, and carried out photocatalytic reaction under visible light irradiation conditions for the next 1h, and the methyl orange solution was taken out every 15min. Measure the concentration of methyl orange at this time, Figure 6 For the Fe prepared in this embodiment 3 o 4 / polypyrrole / polyaniline / TiO 2 / ZnO composite photocatalytic performance line graph, by Figure 6 It can be seen that: stirring under dark conditions for the first 1h, the concentration of the methyl orange solution gradually decreases and at 60min the C / C 0 is 0.71, which is due to the fact that Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 / ZnO composite m...

Embodiment 3

[0044] In order to examine the Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 Magnetic recovery performance of / ZnO composites for Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 / ZnO composite material, the hysteresis loop is measured at 25°C as Figure 7 shown by Figure 7 It can be seen that its saturation magnetization is 25.0emu / g, Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 The remanence and coercivity of the / ZnO composite material are basically zero, and it can be magnetized and demagnetized quickly, which can ensure that Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 The magnetism of the / ZnO composite material itself disappears rapidly, which can effectively prevent its agglomeration due to its magnetism and affect its photocatalytic effect.

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method of a Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material. The preparation methodof the Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material comprises the following steps: firstly, reacting ferrous chloride, potassium sulfite, polyvinylpyrrolidone and potassium hydroxide at constant temperature to prepare Fe3O4; then adding pyrrole, ethanol and concentrated hydrochloric acid into Fe3O4 dispersion respectively to obtain Fe3O4/polypyrrole, adding an aniline monomer, hydrochloric acid and ammonium persulfate into Fe3O4/polypyrrole dispersion to prepare Fe3O4/polypyrrole/polyaniline, and coating the surface of the Fe3O4/polypyrrole/polyaniline with TiO2 by a sol-gel mode;and finally, dispersing Fe3O4/polypyrrole/polyaniline/TiO2/ZnO in acetone, adding ammonia water, carrying out ultrasonic dispersion, adding zinc gluconate for reaction, and preparing the Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material. The preparation method is simple, the composite material has high saturated magnetization and magnetic recovery rate, and the prepared Fe3O4/polypyrrole/polyaniline/TiO2/ZnO composite material has long-term and high-efficiency photocatalytic performance and magnetic recovery performance.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Fe 3 o 4 / polypyrrole / polyaniline / TiO 2 / ZnO composite preparation method. Background technique [0002] With the development of industry, environmental pollution has become a major problem that needs to be solved for human survival and development, and water pollution is a direct threat to human health. Therefore, how to efficiently degrade pollutants in water has become a topic that scientists all over the world need to overcome. Compared with traditional water pollutant treatment technologies, semiconductor photocatalysis technology has the advantages of high efficiency, low carbon, environmental protection, low toxicity, and low cost. The use of sunlight to treat environmental pollutants has great application prospects, and this type of material has also become a hot spot in the field of photocatalysis research. [0003] Titanium dioxide is a common photocatalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/00C08G73/02C08G73/06
Inventor 申芳华廖梓龙
Owner DONGGUAN UNIV OF TECH
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