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Preparation method of 3D ordered macroporous polyaniline (OM PANI)/TiO2 composite photocatalytic material and application thereof

A titanium dioxide, three-dimensional ordered technology, applied in the field of photocatalytic materials, can solve the problems of difficult recovery, easy agglomeration, reduction of photocatalytic efficiency, etc., and achieve the effects of easy sedimentation, high catalytic activity, and simple preparation process.

Inactive Publication Date: 2015-03-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But judging from the current reports, the synthesized PANI / TiO 2 Composite materials mainly include particles, films, etc., and the microscopic size is mainly concentrated in tens of nanometers. There are disadvantages such as easy agglomeration to reduce photocatalytic efficiency, and difficult recycling when used in water.

Method used

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  • Preparation method of 3D ordered macroporous polyaniline (OM PANI)/TiO2 composite photocatalytic material and application thereof
  • Preparation method of 3D ordered macroporous polyaniline (OM PANI)/TiO2 composite photocatalytic material and application thereof
  • Preparation method of 3D ordered macroporous polyaniline (OM PANI)/TiO2 composite photocatalytic material and application thereof

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preparation Embodiment 1

[0040] A method for preparing a three-dimensional ordered macroporous polyaniline / titanium dioxide composite material, comprising the steps of:

[0041] (1) Preparation of three-dimensional ordered macroporous titanium dioxide material

[0042] First, polystyrene (PS) microspheres were synthesized by soap-free emulsion polymerization using styrene as a monomer, and assembled into PS colloidal crystal templates by natural deposition.

[0043] Then use tetrabutyl titanate as titanium source, mix with ethanol, hydrochloric acid, glacial acetic acid and distilled water to make transparent TiO 2 Sol solution precursor. Soak the PS colloidal template in TiO 2 Sol in the sol for 30 minutes, then remove excess sol by suction filtration, dry at 75°C for 2 hours, repeat the above filling process several times. Finally, in a tubular heating furnace, slowly heat up the PS template filled with the precursor to 300°C for 2-4 hours, remove the PS template by oxidative decomposition proces...

preparation Embodiment 2

[0046] A method for preparing a three-dimensional ordered macroporous polyaniline / titanium dioxide composite material, the preparation of a three-dimensional ordered macroporous titanium dioxide material is the same as in Example 1, and the difference from Example 1 is the preparation of a three-dimensional ordered macroporous polyaniline / titanium dioxide composite material The method comprises the following steps: A. Dip and disperse 7 g of the prepared three-dimensional ordered macroporous titanium dioxide material in 20 ml of hydrochloric acid solution containing 0.25 ml of aniline monomer, and ultrasonically vibrate for 15 min; B. place the reaction system in step (A) on ice in the bath, and slowly dropwise add the monomer initiator ammonium persulfate solution with a concentration of 0.7%, and the reaction system continues to react for 2.5 hours after the dropwise addition; ; D. Dry the washed sample at a low temperature of 70° C. to obtain a three-dimensional ordered macr...

preparation Embodiment 3

[0048] A method for preparing a three-dimensional ordered macroporous polyaniline / titanium dioxide composite material, the preparation of a three-dimensional ordered macroporous titanium dioxide material is the same as in Example 1, and the difference from Example 1 is the preparation of a three-dimensional ordered macroporous polyaniline / titanium dioxide composite material The method comprises the following steps: A, immersing and dispersing 10 g of the prepared three-dimensional ordered macroporous titanium dioxide material in 20 ml of hydrochloric acid solution containing 0.5 ml of aniline monomer, and ultrasonically vibrating for 20 min; B, placing the reaction system in step (A) on ice in the bath, and slowly add the monomer initiator ammonium persulfate solution with a concentration of 1%, and the reaction system continues to react for 5 hours after the addition; ; D. Drying the washed sample at a low temperature of 80° C. to obtain a three-dimensional ordered macroporous...

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Abstract

The invention belongs to a preparation method of a 3D ordered macroporous polyaniline (OM PANI) / TiO2 composite photocatalytic material and application thereof. The preparation method comprises the following steps: A, dipping 3-10g of prepared 3D OM PANI / TiO2 material in 50ml of a hydrochloric acid containing 0.05-0.5ml of an aniline monomer, and carrying out ultrasonic oscillation for 5-20 minutes; B, putting a reaction system in the step A into ice bath, dropwise adding a monomer initiator with the concentration of 0.25-1%, and reacting for 2-5 hours; C, washing a sample by adopting ethyl alcohol and / or diethyl ether, and washing the sample with distilled water; D, drying at the low temperature of 60-80 DEG C so as to obtain the sample. The 3D OM PANI / TiO2 composite material is used for combining the favorable conducting performance of PANI as well as characteristics of the relatively low energy gap with the TiO2 catalytic performance, meanwhile improves the defects that the photoproduction electron-hole recombination rate of a single TiO2 material is high and the visible light response is poor, and achieves the effects of improving the TiO2 photocatalytic quantum efficiency and reinforcing the visible light absorption; meanwhile, the material is at hundreds of nanoscales, is difficult to reunite, is easy to settle, and is good in regeneration performance.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a preparation method and application of a three-dimensional ordered macroporous polyaniline / titanium dioxide composite photocatalytic material. Background technique [0002] Photocatalytic oxidation technology is a common method for treating organic wastewater, in which titanium dioxide (TiO 2 ) is considered to be an efficient, green, and most promising photocatalyst material. But on the other hand, due to TiO 2 Some of its own bottleneck factors, such as high photogenerated electron-hole recombination rate, low quantum efficiency; wide band gap (Eg=3.2eV), can only respond to ultraviolet light with a wavelength of less than 387nm; particle size is at the nanometer level, when applied Easy to agglomerate, resulting in reduced catalytic activity and difficult to recycle, etc., thus limiting the TiO 2 The practical process and application fields of photocatalysts. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/10C02F1/30
Inventor 李石杜聪聪赵东风郑经堂王永强刘广东刘贺峰李萌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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