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Preparation method of stannic oxide/polyaniline nanowire composite photocatalyst

A technology of tin dioxide and polyaniline, which is applied in the field of material chemistry, can solve the problems of difficult control of the synthesis process of tin dioxide, difficult control of shape, and influence on the enhancement effect, so as to achieve easy control of reaction, simple equipment, and high material utilization rate Effect

Active Publication Date: 2020-11-06
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent of Shi Yuanchang et al. (Shi Yuanchang, Sun Libo, He Zhaopin, Su Shuo, Li Bo. A preparation method of tin dioxide / polyaniline composite material: China, 201210218542.7 [P]. 2012-10-03.) report, using Sol-gel method is used to prepare tin dioxide nanopowder material, and then microemulsion in-situ polymerization is used to prepare tin dioxide / polyaniline composite material, but the synthesis process of the tin dioxide is difficult to control, the stability is poor, and organic alcohol is used. Environmentally unfriendly as a solvent
In the prior art, tin dioxide is photochemically synthesized, then aniline and an oxidant are added to the acid solution in which tin dioxide is dispersed, and tin dioxide / polyaniline composites are prepared by in-situ chemical oxidation polymerization, but the morphology hard to control
At the same time, when the existing tin dioxide / polyaniline composite materials are prepared, tin dioxide is prepared first and then polyaniline is compounded, which is easy to cause polyaniline to cover the surface of tin dioxide. When the composite material is used as a photocatalytic material, the surface of tin dioxide The active site affects the enhancement effect due to non-coverage

Method used

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  • Preparation method of stannic oxide/polyaniline nanowire composite photocatalyst
  • Preparation method of stannic oxide/polyaniline nanowire composite photocatalyst
  • Preparation method of stannic oxide/polyaniline nanowire composite photocatalyst

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Embodiment 1

[0033] The preparation method of tin dioxide / polyaniline composite photocatalyst, concrete steps are as follows:

[0034] Preparation of polyaniline nanowires

[0035] First add 25mg of aniline and phosphoric acid solution in a 200ml beaker and mix. After stirring in an ice-water bath, add ammonium sulfate and continue stirring until it is dark green. The stirred solution was frozen in the refrigerator and removed after 15 hours. The solution was centrifuged, and the precipitate was washed several times with deionized water and dried in an oven at 60 °C.

[0036] Preparation of tin dioxide / polyaniline composite photocatalyst:

[0037] Dissolve stannous sulfate powder in sulfuric acid solution as a precursor solution, and pour it into a reaction vessel as a precursor solution. Sprinkle 0.05g polyaniline powder on the precursor liquid, carry out photochemical synthesis under the irradiation of 8W ultraviolet lamp, and turn off the ultraviolet lamp after 24 hours. Take out a...

Embodiment 2

[0039] The preparation of tin dioxide / polyaniline composite photocatalyst, concrete steps are as follows:

[0040] Preparation of polyaniline powder:

[0041] First add 25mg of aniline and phosphoric acid solution in a 200ml beaker and mix. After stirring in an ice-water bath, add ammonium sulfate and continue stirring until it is dark green. The stirred solution was placed in the refrigerator to freeze and removed after 24 hours. The solution was centrifuged, and the precipitate was washed several times with deionized water and dried in an oven at 60 °C.

[0042] Preparation of tin dioxide / polyaniline composite photocatalyst:

[0043] Dissolve stannous sulfate powder in sulfuric acid solution as a precursor solution, and pour it into a reaction vessel as a precursor solution. Sprinkle 0.05g polyaniline powder on the precursor liquid, carry out photochemical synthesis under the irradiation of 8W ultraviolet lamp, and turn off the ultraviolet lamp after 24 hours. Take out ...

Embodiment 3

[0045] The preparation of tin dioxide / polyaniline composite photocatalyst, concrete steps are as follows:

[0046] Preparation of polyaniline powder:

[0047] First add 25mg of aniline and phosphoric acid solution in a 200ml beaker and mix. After stirring in an ice-water bath, add ammonium sulfate and continue stirring until it is dark green. The stirred solution was frozen in the refrigerator and removed after 36 hours. The solution was centrifuged, and the precipitate was washed several times with deionized water and dried in an oven at 60 °C.

[0048] Preparation of tin dioxide / polyaniline composite photocatalyst:

[0049]Dissolve stannous sulfate powder in sulfuric acid solution as a precursor solution, and pour it into a reaction vessel as a precursor solution. Sprinkle 0.05g polyaniline powder on the precursor liquid, carry out photochemical synthesis under the irradiation of 8W ultraviolet lamp, and turn off the ultraviolet lamp after 24 hours. Take out and centrif...

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Abstract

The invention belongs to the field of material chemistry, and particularly relates to a preparation method of a stannic oxide / polyaniline nanowire composite photocatalyst. The preparation method comprises the following steps: S1, preparing polyaniline nanowires; S2, mixing the polyaniline nanowires prepared in the step S1 with a tin dioxide precursor solution, and conducting uniform stirring to obtain a mixed turbid liquid, wherein a mass ratio of Sn<2+> to the polyaniline nanowires in the mixed turbid liquid is (4-30): 1; and S3, putting the mixed suspension obtained in the step S2 under an ultraviolet lamp for radiation, reserving a precipitate and conducting purification. The prepared stannic oxide / polyaniline nanowire composite photocatalyst has the characteristics of excellent photocatalytic performance, stable performance and the like, and shows good application prospects in the aspect of degrading organic pollutants.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of a tin dioxide / polyaniline nanowire composite photocatalyst. [0002] technical background [0003] As an important chemical raw material, dyes are widely used in food, textile and papermaking and other fields. During the production and use of dyes, a large amount of wastewater will be generated, which is difficult to effectively degrade by traditional biochemical treatment methods. Photocatalytic degradation technology is an effective way to improve the environment and obtain clean energy. Photocatalysts can be effectively used in the degradation of organic matter in various wastewater and waste gases. In recent years, the development of high-efficiency photocatalysts has attracted widespread attention. [0004] Semiconductor oxide SnO 2 It is a commonly used semiconductor photocatalyst material. But it is often due to the large bandgap widt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/06C02F1/30C02F101/38
CPCB01J31/26B01J31/06C02F1/30C02F2305/10C02F2101/38B01J35/39Y02W10/37
Inventor 孙丰强杨思娴李超贤苏秋瑶何谷平
Owner SOUTH CHINA NORMAL UNIVERSITY
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